--- /dev/null
+! Copyright (C) 2007 Chris Double.\r
+! See http://factorcode.org/license.txt for BSD license.\r
+USING: help.markup help.syntax sequences strings cpu.8080.emulator ;\r
+IN: cpu.8080\r
+\r
+\r
+ARTICLE: { "cpu-8080" "cpu-8080" } "Intel 8080 CPU Emulator"\r
+"The cpu-8080 library provides an emulator for the Intel 8080 CPU"\r
+" instruction set. It is complete enough to emulate some 8080"\r
+" based arcade games." $nl \r
+"The emulated CPU can load 'ROM' files from disk using the "\r
+{ $link load-rom } " and " { $link load-rom* } " words. These expect "\r
+"the " { $link rom-root } " variable to be set to the path "\r
+"containing the ROM file's." ;\r
+\r
+ABOUT: { "cpu-8080" "cpu-8080" } \r
--- /dev/null
+! Copyright (C) 2006 Chris Double.
+! See http://factorcode.org/license.txt for BSD license.
+!
+USING: cpu.8080.emulator tools.time ;
+IN: cpu.8080
+
+INSTRUCTION: NOP ; opcode 00 cycles 04
+INSTRUCTION: LD BC,nn ; opcode 01 cycles 10
+INSTRUCTION: LD (BC),A ; opcode 02 cycles 07
+INSTRUCTION: INC BC ; opcode 03 cycles 06
+INSTRUCTION: INC B ; opcode 04 cycles 05
+INSTRUCTION: DEC B ; opcode 05 cycles 05
+INSTRUCTION: LD B,n ; opcode 06 cycles 07
+INSTRUCTION: RLCA ; opcode 07 cycles 04
+! INSTRUCTION: NOP ; opcode 08 cycles 04
+INSTRUCTION: ADD HL,BC ; opcode 09 cycles 11
+INSTRUCTION: LD A,(BC) ; opcode 0A cycles 07
+INSTRUCTION: DEC BC ; opcode 0B cycles 06
+INSTRUCTION: INC C ; opcode 0C cycles 05
+INSTRUCTION: DEC C ; opcode 0D cycles 05
+INSTRUCTION: LD C,n ; opcode 0E cycles 07
+INSTRUCTION: RRCA ; opcode 0F cycles 04
+INSTRUCTION: LD DE,nn ; opcode 11 cycles 10
+INSTRUCTION: LD (DE),A ; opcode 12 cycles 07
+INSTRUCTION: INC DE ; opcode 13 cycles 06
+INSTRUCTION: INC D ; opcode 14 cycles 05
+INSTRUCTION: DEC D ; opcode 15 cycles 05
+INSTRUCTION: LD D,n ; opcode 16 cycles 07
+INSTRUCTION: RLA ; opcode 17 cycles 04
+INSTRUCTION: ADD HL,DE ; opcode 19 cycles 11
+INSTRUCTION: LD A,(DE) ; opcode 1A cycles 07
+INSTRUCTION: DEC DE ; opcode 1B cycles 06
+INSTRUCTION: INC E ; opcode 1C cycles 05
+INSTRUCTION: DEC E ; opcode 1D cycles 05
+INSTRUCTION: LD E,n ; opcode 1E cycles 07
+INSTRUCTION: RRA ; opcode 1F cycles 04
+INSTRUCTION: LD HL,nn ; opcode 21 cycles 10
+INSTRUCTION: LD (nn),HL ; opcode 22 cycles 16
+INSTRUCTION: INC HL ; opcode 23 cycles 06
+INSTRUCTION: INC H ; opcode 24 cycles 05
+INSTRUCTION: DEC H ; opcode 25 cycles 05
+INSTRUCTION: LD H,n ; opcode 26 cycles 07
+INSTRUCTION: DAA ; opcode 27 cycles 04
+INSTRUCTION: ADD HL,HL ; opcode 29 cycles 11
+INSTRUCTION: LD HL,(nn) ; opcode 2A cycles 16
+INSTRUCTION: DEC HL ; opcode 2B cycles 06
+INSTRUCTION: INC L ; opcode 2C cycles 05
+INSTRUCTION: DEC L ; opcode 2D cycles 05
+INSTRUCTION: LD L,n ; opcode 2E cycles 07
+INSTRUCTION: CPL ; opcode 2F cycles 04
+INSTRUCTION: LD SP,nn ; opcode 31 cycles 10
+INSTRUCTION: LD (nn),A ; opcode 32 cycles 13
+INSTRUCTION: INC SP ; opcode 33 cycles 06
+INSTRUCTION: INC (HL) ; opcode 34 cycles 10
+INSTRUCTION: DEC (HL) ; opcode 35 cycles 10
+INSTRUCTION: LD (HL),n ; opcode 36 cycles 10
+INSTRUCTION: SCF ; opcode 37 cycles 04
+INSTRUCTION: ADD HL,SP ; opcode 39 cycles 11
+INSTRUCTION: LD A,(nn) ; opcode 3A cycles 13
+INSTRUCTION: DEC SP ; opcode 3B cycles 06
+INSTRUCTION: INC A ; opcode 3C cycles 05
+INSTRUCTION: DEC A ; opcode 3D cycles 05
+INSTRUCTION: LD A,n ; opcode 3E cycles 07
+INSTRUCTION: CCF ; opcode 3F cycles 04
+INSTRUCTION: LD B,B ; opcode 40 cycles 05
+INSTRUCTION: LD B,C ; opcode 41 cycles 05
+INSTRUCTION: LD B,D ; opcode 42 cycles 05
+INSTRUCTION: LD B,E ; opcode 43 cycles 05
+INSTRUCTION: LD B,H ; opcode 44 cycles 05
+INSTRUCTION: LD B,L ; opcode 45 cycles 05
+INSTRUCTION: LD B,(HL) ; opcode 46 cycles 07
+INSTRUCTION: LD B,A ; opcode 47 cycles 05
+INSTRUCTION: LD C,B ; opcode 48 cycles 05
+INSTRUCTION: LD C,C ; opcode 49 cycles 05
+INSTRUCTION: LD C,D ; opcode 4A cycles 05
+INSTRUCTION: LD C,E ; opcode 4B cycles 05
+INSTRUCTION: LD C,H ; opcode 4C cycles 05
+INSTRUCTION: LD C,L ; opcode 4D cycles 05
+INSTRUCTION: LD C,(HL) ; opcode 4E cycles 07
+INSTRUCTION: LD C,A ; opcode 4F cycles 05
+INSTRUCTION: LD D,B ; opcode 50 cycles 05
+INSTRUCTION: LD D,C ; opcode 51 cycles 05
+INSTRUCTION: LD D,D ; opcode 52 cycles 05
+INSTRUCTION: LD D,E ; opcode 53 cycles 05
+INSTRUCTION: LD D,H ; opcode 54 cycles 05
+INSTRUCTION: LD D,L ; opcode 55 cycles 05
+INSTRUCTION: LD D,(HL) ; opcode 56 cycles 07
+INSTRUCTION: LD D,A ; opcode 57 cycles 05
+INSTRUCTION: LD E,B ; opcode 58 cycles 05
+INSTRUCTION: LD E,C ; opcode 59 cycles 05
+INSTRUCTION: LD E,D ; opcode 5A cycles 05
+INSTRUCTION: LD E,E ; opcode 5B cycles 05
+INSTRUCTION: LD E,H ; opcode 5C cycles 05
+INSTRUCTION: LD E,L ; opcode 5D cycles 05
+INSTRUCTION: LD E,(HL) ; opcode 5E cycles 07
+INSTRUCTION: LD E,A ; opcode 5F cycles 05
+INSTRUCTION: LD H,B ; opcode 60 cycles 05
+INSTRUCTION: LD H,C ; opcode 61 cycles 05
+INSTRUCTION: LD H,D ; opcode 62 cycles 05
+INSTRUCTION: LD H,E ; opcode 63 cycles 05
+INSTRUCTION: LD H,H ; opcode 64 cycles 05
+INSTRUCTION: LD H,L ; opcode 65 cycles 05
+INSTRUCTION: LD H,(HL) ; opcode 66 cycles 07
+INSTRUCTION: LD H,A ; opcode 67 cycles 05
+INSTRUCTION: LD L,B ; opcode 68 cycles 05
+INSTRUCTION: LD L,C ; opcode 69 cycles 05
+INSTRUCTION: LD L,D ; opcode 6A cycles 05
+INSTRUCTION: LD L,E ; opcode 6B cycles 05
+INSTRUCTION: LD L,H ; opcode 6C cycles 05
+INSTRUCTION: LD L,L ; opcode 6D cycles 05
+INSTRUCTION: LD L,(HL) ; opcode 6E cycles 07
+INSTRUCTION: LD L,A ; opcode 6F cycles 05
+INSTRUCTION: LD (HL),B ; opcode 70 cycles 07
+INSTRUCTION: LD (HL),C ; opcode 71 cycles 07
+INSTRUCTION: LD (HL),D ; opcode 72 cycles 07
+INSTRUCTION: LD (HL),E ; opcode 73 cycles 07
+INSTRUCTION: LD (HL),H ; opcode 74 cycles 07
+INSTRUCTION: LD (HL),L ; opcode 75 cycles 07
+INSTRUCTION: HALT ; opcode 76 cycles 07
+INSTRUCTION: LD (HL),A ; opcode 77 cycles 07
+INSTRUCTION: LD A,B ; opcode 78 cycles 05
+INSTRUCTION: LD A,C ; opcode 79 cycles 05
+INSTRUCTION: LD A,D ; opcode 7A cycles 05
+INSTRUCTION: LD A,E ; opcode 7B cycles 05
+INSTRUCTION: LD A,H ; opcode 7C cycles 05
+INSTRUCTION: LD A,L ; opcode 7D cycles 05
+INSTRUCTION: LD A,(HL) ; opcode 7E cycles 07
+INSTRUCTION: LD A,A ; opcode 7F cycles 05
+INSTRUCTION: ADD A,B ; opcode 80 cycles 04
+INSTRUCTION: ADD A,C ; opcode 81 cycles 04
+INSTRUCTION: ADD A,D ; opcode 82 cycles 04
+INSTRUCTION: ADD A,E ; opcode 83 cycles 04
+INSTRUCTION: ADD A,H ; opcode 84 cycles 04
+INSTRUCTION: ADD A,L ; opcode 85 cycles 04
+INSTRUCTION: ADD A,(HL) ; opcode 86 cycles 07
+INSTRUCTION: ADD A,A ; opcode 87 cycles 04
+INSTRUCTION: ADC A,B ; opcode 88 cycles 04
+INSTRUCTION: ADC A,C ; opcode 89 cycles 04
+INSTRUCTION: ADC A,D ; opcode 8A cycles 04
+INSTRUCTION: ADC A,E ; opcode 8B cycles 04
+INSTRUCTION: ADC A,H ; opcode 8C cycles 04
+INSTRUCTION: ADC A,L ; opcode 8D cycles 04
+INSTRUCTION: ADC A,(HL) ; opcode 8E cycles 07
+INSTRUCTION: ADC A,A ; opcode 8F cycles 04
+INSTRUCTION: SUB B ; opcode 90 cycles 04
+INSTRUCTION: SUB C ; opcode 91 cycles 04
+INSTRUCTION: SUB D ; opcode 92 cycles 04
+INSTRUCTION: SUB E ; opcode 93 cycles 04
+INSTRUCTION: SUB H ; opcode 94 cycles 04
+INSTRUCTION: SUB L ; opcode 95 cycles 04
+INSTRUCTION: SUB (HL) ; opcode 96 cycles 07
+INSTRUCTION: SUB A ; opcode 97 cycles 04
+INSTRUCTION: SBC A,B ; opcode 98 cycles 04
+INSTRUCTION: SBC A,C ; opcode 99 cycles 04
+INSTRUCTION: SBC A,D ; opcode 9A cycles 04
+INSTRUCTION: SBC A,E ; opcode 9B cycles 04
+INSTRUCTION: SBC A,H ; opcode 9C cycles 04
+INSTRUCTION: SBC A,L ; opcode 9D cycles 04
+INSTRUCTION: SBC A,(HL) ; opcode 9E cycles 07
+INSTRUCTION: SBC A,A ; opcode 9F cycles 04
+INSTRUCTION: AND B ; opcode A0 cycles 04
+INSTRUCTION: AND C ; opcode A1 cycles 04
+INSTRUCTION: AND D ; opcode A2 cycles 04
+INSTRUCTION: AND E ; opcode A3 cycles 04
+INSTRUCTION: AND H ; opcode A4 cycles 04
+INSTRUCTION: AND L ; opcode A5 cycles 04
+INSTRUCTION: AND (HL) ; opcode A6 cycles 07
+INSTRUCTION: AND A ; opcode A7 cycles 04
+INSTRUCTION: XOR B ; opcode A8 cycles 04
+INSTRUCTION: XOR C ; opcode A9 cycles 04
+INSTRUCTION: XOR D ; opcode AA cycles 04
+INSTRUCTION: XOR E ; opcode AB cycles 04
+INSTRUCTION: XOR H ; opcode AC cycles 04
+INSTRUCTION: XOR L ; opcode AD cycles 04
+INSTRUCTION: XOR (HL) ; opcode AE cycles 07
+INSTRUCTION: XOR A ; opcode AF cycles 04
+INSTRUCTION: OR B ; opcode B0 cycles 04
+INSTRUCTION: OR C ; opcode B1 cycles 04
+INSTRUCTION: OR D ; opcode B2 cycles 04
+INSTRUCTION: OR E ; opcode B3 cycles 04
+INSTRUCTION: OR H ; opcode B4 cycles 04
+INSTRUCTION: OR L ; opcode B5 cycles 04
+INSTRUCTION: OR (HL) ; opcode B6 cycles 07
+INSTRUCTION: OR A ; opcode B7 cycles 04
+INSTRUCTION: CP B ; opcode B8 cycles 04
+INSTRUCTION: CP C ; opcode B9 cycles 04
+INSTRUCTION: CP D ; opcode BA cycles 04
+INSTRUCTION: CP E ; opcode BB cycles 04
+INSTRUCTION: CP H ; opcode BC cycles 04
+INSTRUCTION: CP L ; opcode BD cycles 04
+INSTRUCTION: CP (HL) ; opcode BE cycles 07
+INSTRUCTION: CP A ; opcode BF cycles 04
+INSTRUCTION: RET NZ ; opcode C0 cycles 05
+INSTRUCTION: POP BC ; opcode C1 cycles 10
+INSTRUCTION: JP NZ,nn ; opcode C2 cycles 10
+INSTRUCTION: JP nn ; opcode C3 cycles 10
+INSTRUCTION: CALL NZ,nn ; opcode C4 cycles 11
+INSTRUCTION: PUSH BC ; opcode C5 cycles 11
+INSTRUCTION: ADD A,n ; opcode C6 cycles 07
+INSTRUCTION: RST 0 ; opcode C7 cycles 11
+INSTRUCTION: RET Z ; opcode C8 cycles 05
+INSTRUCTION: RET nn ; opcode C9 cycles 10
+INSTRUCTION: JP Z,nn ; opcode CA cycles 10
+INSTRUCTION: CALL Z,nn ; opcode CC cycles 11
+INSTRUCTION: CALL nn ; opcode CD cycles 17
+INSTRUCTION: ADC A,n ; opcode CE cycles 07
+INSTRUCTION: RST 8 ; opcode CF cycles 11
+INSTRUCTION: RET NC ; opcode D0 cycles 05
+INSTRUCTION: POP DE ; opcode D1 cycles 10
+INSTRUCTION: JP NC,nn ; opcode D2 cycles 10
+INSTRUCTION: OUT (n),A ; opcode D3 cycles 10
+INSTRUCTION: CALL NC,nn ; opcode D4 cycles 11
+INSTRUCTION: PUSH DE ; opcode D5 cycles 11
+INSTRUCTION: SUB n ; opcode D6 cycles 07
+INSTRUCTION: RST 10H ; opcode D7 cycles 11
+INSTRUCTION: RET C ; opcode D8 cycles 05
+INSTRUCTION: JP C,nn ; opcode DA cycles 10
+INSTRUCTION: IN A,(n) ; opcode DB cycles 10
+INSTRUCTION: CALL C,nn ; opcode DC cycles 11
+INSTRUCTION: SBC A,n ; opcode DE cycles 07
+INSTRUCTION: RST 18H ; opcode DF cycles 11
+INSTRUCTION: RET PO ; opcode E0 cycles 05
+INSTRUCTION: POP HL ; opcode E1 cycles 10
+INSTRUCTION: JP PO,nn ; opcode E2 cycles 10
+INSTRUCTION: EX (SP),HL ; opcode E3 cycles 04
+INSTRUCTION: CALL PO,nn ; opcode E4 cycles 11
+INSTRUCTION: PUSH HL ; opcode E5 cycles 11
+INSTRUCTION: AND n ; opcode E6 cycles 07
+INSTRUCTION: RST 20H ; opcode E7 cycles 11
+INSTRUCTION: RET PE ; opcode E8 cycles 05
+INSTRUCTION: JP (HL) ; opcode E9 cycles 04
+INSTRUCTION: JP PE,nn ; opcode EA cycles 10
+INSTRUCTION: EX DE,HL ; opcode EB cycles 04
+INSTRUCTION: CALL PE,nn ; opcode EC cycles 11
+INSTRUCTION: XOR n ; opcode EE cycles 07
+INSTRUCTION: RST 28H ; opcode EF cycles 11
+INSTRUCTION: RET P ; opcode F0 cycles 05
+INSTRUCTION: POP AF ; opcode F1 cycles 10
+INSTRUCTION: JP P,nn ; opcode F2 cycles 10
+INSTRUCTION: DI ; opcode F3 cycles 04
+INSTRUCTION: CALL P,nn ; opcode F4 cycles 11
+INSTRUCTION: PUSH AF ; opcode F5 cycles 11
+INSTRUCTION: OR n ; opcode F6 cycles 07
+INSTRUCTION: RST 30H ; opcode F7 cycles 11
+INSTRUCTION: RET M ; opcode F8 cycles 05
+INSTRUCTION: LD SP,HL ; opcode F9 cycles 06
+INSTRUCTION: JP M,nn ; opcode FA cycles 10
+INSTRUCTION: EI ; opcode FB cycles 04
+INSTRUCTION: CALL M,nn ; opcode FC cycles 11
+INSTRUCTION: CP n ; opcode FE cycles 07
+INSTRUCTION: RST 38H ; opcode FF cycles 11
--- /dev/null
+Chris Double
--- /dev/null
+Chris Double
--- /dev/null
+! Copyright (C) 2007 Chris Double.\r
+! See http://factorcode.org/license.txt for BSD license.\r
+USING: help.markup help.syntax sequences strings ;\r
+IN: cpu.8080.emulator\r
+\r
+HELP: load-rom \r
+{ $values { "filename" string } { "cpu" cpu } }\r
+{ $description \r
+"Read the ROM file into the cpu's memory starting at address 0000. " \r
+"The filename is relative to the path stored in the " { $link rom-root }\r
+" variable. An exception is thrown if this variable is not set."\r
+}\r
+{ $see-also load-rom* } ;\r
+\r
+HELP: load-rom*\r
+{ $values { "seq" sequence } { "cpu" cpu } }\r
+{ $description \r
+"Loads one or more ROM files into the cpu's memory. Each file is "\r
+"loaded at a particular starting address. 'seq' is a sequence of "\r
+"2 element arrays. The first element is the address and the second "\r
+"element is the file to load at that address." $nl\r
+"The filenames are relative to the path stored in the " { $link rom-root }\r
+" variable. An exception is thrown if this variable is not set."\r
+}\r
+{ $examples\r
+ { $code "{ { HEX: 0000 \"invaders.rom\" } } <cpu> load-rom*" }\r
+}\r
+{ $see-also load-rom } ;\r
+\r
+HELP: rom-root\r
+{ $description \r
+"Holds the path where the ROM files are stored. Used for expanding "\r
+"the relative filenames passed to " { $link load-rom } " and "\r
+{ $link load-rom* } "."\r
+}\r
+{ $see-also load-rom load-rom* } ;\r
--- /dev/null
+! Copyright (C) 2006 Chris Double.
+! See http://factorcode.org/license.txt for BSD license.
+!
+USING:
+ accessors
+ arrays
+ assocs
+ combinators
+ fry
+ io
+ io.encodings.binary
+ io.files
+ io.pathnames
+ kernel
+ lexer
+ make
+ math
+ math.parser
+ namespaces
+ parser
+ peg
+ peg.ebnf
+ peg.parsers
+ quotations
+ sequences
+ sequences.deep
+ syntax
+ words
+;
+IN: cpu.8080.emulator
+
+TUPLE: cpu b c d e f h l a pc sp halted? last-interrupt cycles ram ;
+
+GENERIC: reset ( cpu -- )
+GENERIC: update-video ( value addr cpu -- )
+GENERIC: read-port ( port cpu -- byte )
+GENERIC: write-port ( value port cpu -- )
+
+M: cpu update-video ( value addr cpu -- )
+ 3drop ;
+
+M: cpu read-port ( port cpu -- byte )
+ #! Read a byte from the hardware port. 'port' should
+ #! be an 8-bit value.
+ 2drop 0 ;
+
+M: cpu write-port ( value port cpu -- )
+ #! Write a byte to the hardware port, where 'port' is
+ #! an 8-bit value.
+ 3drop ;
+
+CONSTANT: carry-flag HEX: 01
+CONSTANT: parity-flag HEX: 04
+CONSTANT: half-carry-flag HEX: 10
+CONSTANT: interrupt-flag HEX: 20
+CONSTANT: zero-flag HEX: 40
+CONSTANT: sign-flag HEX: 80
+
+: >word< ( word -- byte byte )
+ #! Explode a word into its two 8 bit values.
+ dup HEX: FF bitand swap -8 shift HEX: FF bitand swap ;
+
+: af>> ( cpu -- word )
+ #! Return the 16-bit pseudo register AF.
+ [ a>> 8 shift ] keep f>> bitor ;
+
+: (>>af) ( value cpu -- )
+ #! Set the value of the 16-bit pseudo register AF
+ [ >word< ] dip swap >>f swap >>a drop ;
+
+: bc>> ( cpu -- word )
+ #! Return the 16-bit pseudo register BC.
+ [ b>> 8 shift ] keep c>> bitor ;
+
+: (>>bc) ( value cpu -- )
+ #! Set the value of the 16-bit pseudo register BC
+ [ >word< ] dip swap >>c swap >>b drop ;
+
+: de>> ( cpu -- word )
+ #! Return the 16-bit pseudo register DE.
+ [ d>> 8 shift ] keep e>> bitor ;
+
+: (>>de) ( value cpu -- )
+ #! Set the value of the 16-bit pseudo register DE
+ [ >word< ] dip swap >>e swap >>d drop ;
+
+: hl>> ( cpu -- word )
+ #! Return the 16-bit pseudo register HL.
+ [ h>> 8 shift ] keep l>> bitor ;
+
+: (>>hl) ( value cpu -- )
+ #! Set the value of the 16-bit pseudo register HL
+ [ >word< ] dip swap >>l swap >>h drop ;
+
+: flag-set? ( flag cpu -- bool )
+ f>> bitand 0 = not ;
+
+: flag-clear? ( flag cpu -- bool )
+ f>> bitand 0 = ;
+
+: flag-nz? ( cpu -- bool )
+ #! Test flag status
+ f>> zero-flag bitand 0 = ;
+
+: flag-z? ( cpu -- bool )
+ #! Test flag status
+ f>> zero-flag bitand 0 = not ;
+
+: flag-nc? ( cpu -- bool )
+ #! Test flag status
+ f>> carry-flag bitand 0 = ;
+
+: flag-c? ( cpu -- bool )
+ #! Test flag status
+ f>> carry-flag bitand 0 = not ;
+
+: flag-po? ( cpu -- bool )
+ #! Test flag status
+ f>> parity-flag bitand 0 = ;
+
+: flag-pe? ( cpu -- bool )
+ #! Test flag status
+ f>> parity-flag bitand 0 = not ;
+
+: flag-p? ( cpu -- bool )
+ #! Test flag status
+ f>> sign-flag bitand 0 = ;
+
+: flag-m? ( cpu -- bool )
+ #! Test flag status
+ f>> sign-flag bitand 0 = not ;
+
+: read-byte ( addr cpu -- byte )
+ #! Read one byte from memory at the specified address.
+ #! The address is 16-bit, but if a value greater than
+ #! 0xFFFF is provided then return a default value.
+ over HEX: FFFF <= [
+ ram>> nth
+ ] [
+ 2drop HEX: FF
+ ] if ;
+
+: read-word ( addr cpu -- word )
+ #! Read a 16-bit word from memory at the specified address.
+ #! The address is 16-bit, but if a value greater than
+ #! 0xFFFF is provided then return a default value.
+ [ read-byte ] 2keep [ 1 + ] dip read-byte 8 shift bitor ;
+
+: next-byte ( cpu -- byte )
+ #! Return the value of the byte at PC, and increment PC.
+ [ pc>> ] keep
+ [ read-byte ] keep
+ [ pc>> 1 + ] keep
+ (>>pc) ;
+
+: next-word ( cpu -- word )
+ #! Return the value of the word at PC, and increment PC.
+ [ pc>> ] keep
+ [ read-word ] keep
+ [ pc>> 2 + ] keep
+ (>>pc) ;
+
+
+: write-byte ( value addr cpu -- )
+ #! Write a byte to the specified memory address.
+ over dup HEX: 2000 < swap HEX: FFFF > or [
+ 3drop
+ ] [
+ 3dup ram>> set-nth
+ update-video
+ ] if ;
+
+
+: write-word ( value addr cpu -- )
+ #! Write a 16-bit word to the specified memory address.
+ [ >word< ] 2dip [ write-byte ] 2keep [ 1 + ] dip write-byte ;
+
+: cpu-a-bitand ( quot cpu -- )
+ #! A &= quot call
+ [ a>> swap call bitand ] keep (>>a) ; inline
+
+: cpu-a-bitor ( quot cpu -- )
+ #! A |= quot call
+ [ a>> swap call bitor ] keep (>>a) ; inline
+
+: cpu-a-bitxor ( quot cpu -- )
+ #! A ^= quot call
+ [ a>> swap call bitxor ] keep (>>a) ; inline
+
+: cpu-a-bitxor= ( value cpu -- )
+ #! cpu-a ^= value
+ [ a>> bitxor ] keep (>>a) ;
+
+: cpu-f-bitand ( quot cpu -- )
+ #! F &= quot call
+ [ f>> swap call bitand ] keep (>>f) ; inline
+
+: cpu-f-bitor ( quot cpu -- )
+ #! F |= quot call
+ [ f>> swap call bitor ] keep (>>f) ; inline
+
+: cpu-f-bitxor ( quot cpu -- )
+ #! F |= quot call
+ [ f>> swap call bitxor ] keep (>>f) ; inline
+
+: cpu-f-bitor= ( value cpu -- )
+ #! cpu-f |= value
+ [ f>> bitor ] keep (>>f) ;
+
+: cpu-f-bitand= ( value cpu -- )
+ #! cpu-f &= value
+ [ f>> bitand ] keep (>>f) ;
+
+: cpu-f-bitxor= ( value cpu -- )
+ #! cpu-f ^= value
+ [ f>> bitxor ] keep (>>f) ;
+
+: set-flag ( cpu flag -- )
+ swap cpu-f-bitor= ;
+
+: clear-flag ( cpu flag -- )
+ bitnot HEX: FF bitand swap cpu-f-bitand= ;
+
+: update-zero-flag ( result cpu -- )
+ #! If the result of an instruction has the value 0, this
+ #! flag is set, otherwise it is reset.
+ swap HEX: FF bitand 0 = [ zero-flag set-flag ] [ zero-flag clear-flag ] if ;
+
+: update-sign-flag ( result cpu -- )
+ #! If the most significant bit of the result
+ #! has the value 1 then the flag is set, otherwise
+ #! it is reset.
+ swap HEX: 80 bitand 0 = [ sign-flag clear-flag ] [ sign-flag set-flag ] if ;
+
+: update-parity-flag ( result cpu -- )
+ #! If the modulo 2 sum of the bits of the result
+ #! is 0, (ie. if the result has even parity) this flag
+ #! is set, otherwise it is reset.
+ swap HEX: FF bitand 2 mod 0 = [ parity-flag set-flag ] [ parity-flag clear-flag ] if ;
+
+: update-carry-flag ( result cpu -- )
+ #! If the instruction resulted in a carry (from addition)
+ #! or a borrow (from subtraction or a comparison) out of the
+ #! higher order bit, this flag is set, otherwise it is reset.
+ swap dup HEX: 100 >= swap 0 < or [ carry-flag set-flag ] [ carry-flag clear-flag ] if ;
+
+: update-half-carry-flag ( original change-by result cpu -- )
+ #! If the instruction caused a carry out of bit 3 and into bit 4 of the
+ #! resulting value, the half carry flag is set, otherwise it is reset.
+ #! The 'original' is the original value of the register being changed.
+ #! 'change-by' is the amount it is being added or decremented by.
+ #! 'result' is the result of that change.
+ [ bitxor bitxor HEX: 10 bitand 0 = not ] dip
+ swap [ half-carry-flag set-flag ] [ half-carry-flag clear-flag ] if ;
+
+: update-flags ( result cpu -- )
+ 2dup update-carry-flag
+ 2dup update-parity-flag
+ 2dup update-sign-flag
+ update-zero-flag ;
+
+: update-flags-no-carry ( result cpu -- )
+ 2dup update-parity-flag
+ 2dup update-sign-flag
+ update-zero-flag ;
+
+: add-byte ( lhs rhs cpu -- result )
+ #! Add rhs to lhs
+ [ 2dup + ] dip
+ [ update-flags ] 2keep
+ [ update-half-carry-flag ] 2keep
+ drop HEX: FF bitand ;
+
+: add-carry ( change-by result cpu -- change-by result )
+ #! Add the effect of the carry flag to the result
+ flag-c? [ 1 + [ 1 + ] dip ] when ;
+
+: add-byte-with-carry ( lhs rhs cpu -- result )
+ #! Add rhs to lhs plus carry.
+ [ 2dup + ] dip
+ [ add-carry ] keep
+ [ update-flags ] 2keep
+ [ update-half-carry-flag ] 2keep
+ drop HEX: FF bitand ;
+
+: sub-carry ( change-by result cpu -- change-by result )
+ #! Subtract the effect of the carry flag from the result
+ flag-c? [ 1 - [ 1 - ] dip ] when ;
+
+: sub-byte ( lhs rhs cpu -- result )
+ #! Subtract rhs from lhs
+ [ 2dup - ] dip
+ [ update-flags ] 2keep
+ [ update-half-carry-flag ] 2keep
+ drop HEX: FF bitand ;
+
+: sub-byte-with-carry ( lhs rhs cpu -- result )
+ #! Subtract rhs from lhs and take carry into account
+ [ 2dup - ] dip
+ [ sub-carry ] keep
+ [ update-flags ] 2keep
+ [ update-half-carry-flag ] 2keep
+ drop HEX: FF bitand ;
+
+: inc-byte ( byte cpu -- result )
+ #! Increment byte by one. Note that carry flag is not affected
+ #! by this operation.
+ [ 1 2dup + ] dip
+ [ update-flags-no-carry ] 2keep
+ [ update-half-carry-flag ] 2keep
+ drop HEX: FF bitand ;
+
+: dec-byte ( byte cpu -- result )
+ #! Decrement byte by one. Note that carry flag is not affected
+ #! by this operation.
+ [ 1 2dup - ] dip
+ [ update-flags-no-carry ] 2keep
+ [ update-half-carry-flag ] 2keep
+ drop HEX: FF bitand ;
+
+: inc-word ( w cpu -- w )
+ #! Increment word by one. Note that no flags are modified.
+ drop 1 + HEX: FFFF bitand ;
+
+: dec-word ( w cpu -- w )
+ #! Decrement word by one. Note that no flags are modified.
+ drop 1 - HEX: FFFF bitand ;
+
+: add-word ( lhs rhs cpu -- result )
+ #! Add rhs to lhs. Note that only the carry flag is modified
+ #! and only if there is a carry out of the double precision add.
+ [ + ] dip over HEX: FFFF > [ carry-flag set-flag ] [ drop ] if HEX: FFFF bitand ;
+
+: bit3or ( lhs rhs -- 0|1 )
+ #! bitor bit 3 of the two numbers on the stack
+ BIN: 00001000 bitand -3 shift [
+ BIN: 00001000 bitand -3 shift
+ ] dip
+ bitor ;
+
+: and-byte ( lhs rhs cpu -- result )
+ #! Logically and rhs to lhs. The carry flag is cleared and
+ #! the half carry is set to the ORing of bits 3 of the operands.
+ [ drop bit3or ] 3keep ! bit3or lhs rhs cpu
+ [ bitand ] dip [ update-flags ] 2keep
+ [ carry-flag clear-flag ] keep
+ rot 0 = [ half-carry-flag set-flag ] [ half-carry-flag clear-flag ] if
+ HEX: FF bitand ;
+
+: xor-byte ( lhs rhs cpu -- result )
+ #! Logically xor rhs to lhs. The carry and half-carry flags are cleared.
+ [ bitxor ] dip [ update-flags ] 2keep
+ [ half-carry-flag carry-flag bitor clear-flag ] keep
+ drop HEX: FF bitand ;
+
+: or-byte ( lhs rhs cpu -- result )
+ #! Logically or rhs to lhs. The carry and half-carry flags are cleared.
+ [ bitor ] dip [ update-flags ] 2keep
+ [ half-carry-flag carry-flag bitor clear-flag ] keep
+ drop HEX: FF bitand ;
+
+: decrement-sp ( n cpu -- )
+ #! Decrement the stackpointer by n.
+ [ sp>> ] keep
+ [ swap - ] dip (>>sp) ;
+
+: save-pc ( cpu -- )
+ #! Save the value of the PC on the stack.
+ [ pc>> ] keep ! pc cpu
+ [ sp>> ] keep ! pc sp cpu
+ write-word ;
+
+: push-pc ( cpu -- )
+ #! Push the value of the PC on the stack.
+ 2 over decrement-sp
+ save-pc ;
+
+: pop-pc ( cpu -- pc )
+ #! Pop the value of the PC off the stack.
+ [ sp>> ] keep
+ [ read-word ] keep
+ -2 swap decrement-sp ;
+
+: push-sp ( value cpu -- )
+ [ 2 swap decrement-sp ] keep
+ [ sp>> ] keep
+ write-word ;
+
+: pop-sp ( cpu -- value )
+ [ sp>> ] keep
+ [ read-word ] keep
+ -2 swap decrement-sp ;
+
+: call-sub ( addr cpu -- )
+ #! Call the address as a subroutine.
+ dup push-pc
+ [ HEX: FFFF bitand ] dip (>>pc) ;
+
+: ret-from-sub ( cpu -- )
+ [ pop-pc ] keep (>>pc) ;
+
+: interrupt ( number cpu -- )
+ #! Perform a hardware interrupt
+! "***Interrupt: " write over 16 >base print
+ dup f>> interrupt-flag bitand 0 = not [
+ dup push-pc
+ (>>pc)
+ ] [
+ 2drop
+ ] if ;
+
+: inc-cycles ( n cpu -- )
+ #! Increment the number of cpu cycles
+ [ cycles>> + ] keep (>>cycles) ;
+
+: instruction-cycles ( -- vector )
+ #! Return a 256 element vector containing the cycles for
+ #! each opcode in the 8080 instruction set.
+ \ instruction-cycles get-global [
+ 256 f <array> \ instruction-cycles set-global
+ ] unless
+ \ instruction-cycles get-global ;
+
+: not-implemented ( <cpu> -- )
+ drop ;
+
+: instructions ( -- vector )
+ #! Return a 256 element vector containing the emulation words for
+ #! each opcode in the 8080 instruction set.
+ \ instructions get-global [
+ 256 [ not-implemented ] <array> \ instructions set-global
+ ] unless
+ \ instructions get-global ;
+
+: set-instruction ( quot n -- )
+ instructions set-nth ;
+
+M: cpu reset ( cpu -- )
+ #! Reset the CPU to its poweron state
+ 0 >>b
+ 0 >>c
+ 0 >>d
+ 0 >>e
+ 0 >>h
+ 0 >>l
+ 0 >>a
+ 0 >>f
+ 0 >>pc
+ HEX: F000 >>sp
+ HEX: FFFF 0 <array> >>ram
+ f >>halted?
+ HEX: 10 >>last-interrupt
+ 0 >>cycles
+ drop ;
+
+: <cpu> ( -- cpu ) cpu new dup reset ;
+
+: (load-rom) ( n ram -- )
+ read1 [ ! n ram ch
+ -rot [ set-nth ] 2keep [ 1 + ] dip (load-rom)
+ ] [
+ 2drop
+ ] if* ;
+
+ #! Reads the ROM from stdin and stores it in ROM from
+ #! offset n.
+: load-rom ( filename cpu -- )
+ #! Load the contents of the file into ROM.
+ #! (address 0x0000-0x1FFF).
+ ram>> swap binary [
+ 0 swap (load-rom)
+ ] with-file-reader ;
+
+SYMBOL: rom-root
+
+: rom-dir ( -- string )
+ rom-root get [ home "roms" append-path dup exists? [ drop f ] unless ] unless* ;
+
+: load-rom* ( seq cpu -- )
+ #! 'seq' is an array of arrays. Each array contains
+ #! an address and filename of a ROM file. The ROM
+ #! file will be loaded at the specified address. This
+ #! file path shoul dbe relative to the '/roms' resource path.
+ rom-dir [
+ ram>> [
+ swap first2 rom-dir prepend-path binary [
+ swap (load-rom)
+ ] with-file-reader
+ ] curry each
+ ] [
+ !
+ ! the ROM files.
+ "Set 'rom-root' to the path containing the root of the 8080 ROM files." throw
+ ] if ;
+
+: read-instruction ( cpu -- word )
+ #! Read the next instruction from the cpu's program
+ #! counter, and increment the program counter.
+ [ pc>> ] keep ! pc cpu
+ [ over 1 + swap (>>pc) ] keep
+ read-byte ;
+
+: get-cycles ( n -- opcode )
+ #! Returns the cycles for the given instruction value.
+ #! If the opcode is not defined throw an error.
+ dup instruction-cycles nth [
+ nip
+ ] [
+ [ "Undefined 8080 opcode: " % number>string % ] "" make throw
+ ] if* ;
+
+: process-interrupts ( cpu -- )
+ #! Process any hardware interrupts
+ [ cycles>> ] keep
+ over 16667 < [
+ 2drop
+ ] [
+ [ [ 16667 - ] dip (>>cycles) ] keep
+ dup last-interrupt>> HEX: 10 = [
+ HEX: 08 over (>>last-interrupt) HEX: 08 swap interrupt
+ ] [
+ HEX: 10 over (>>last-interrupt) HEX: 10 swap interrupt
+ ] if
+ ] if ;
+
+: peek-instruction ( cpu -- word )
+ #! Return the next instruction from the cpu's program
+ #! counter, but don't increment the counter.
+ [ pc>> ] keep read-byte instructions nth first ;
+
+: cpu. ( cpu -- )
+ [ " PC: " write pc>> 16 >base 4 CHAR: \s pad-head write ] keep
+ [ " B: " write b>> 16 >base 2 CHAR: \s pad-head write ] keep
+ [ " C: " write c>> 16 >base 2 CHAR: \s pad-head write ] keep
+ [ " D: " write d>> 16 >base 2 CHAR: \s pad-head write ] keep
+ [ " E: " write e>> 16 >base 2 CHAR: \s pad-head write ] keep
+ [ " F: " write f>> 16 >base 2 CHAR: \s pad-head write ] keep
+ [ " H: " write h>> 16 >base 2 CHAR: \s pad-head write ] keep
+ [ " L: " write l>> 16 >base 2 CHAR: \s pad-head write ] keep
+ [ " A: " write a>> 16 >base 2 CHAR: \s pad-head write ] keep
+ [ " SP: " write sp>> 16 >base 4 CHAR: \s pad-head write ] keep
+ [ " cycles: " write cycles>> number>string 5 CHAR: \s pad-head write ] keep
+ [ " " write peek-instruction name>> write " " write ] keep
+ nl drop ;
+
+: cpu*. ( cpu -- )
+ [ " PC: " write pc>> 16 >base 4 CHAR: \s pad-head write ] keep
+ [ " B: " write b>> 16 >base 2 CHAR: \s pad-head write ] keep
+ [ " C: " write c>> 16 >base 2 CHAR: \s pad-head write ] keep
+ [ " D: " write d>> 16 >base 2 CHAR: \s pad-head write ] keep
+ [ " E: " write e>> 16 >base 2 CHAR: \s pad-head write ] keep
+ [ " F: " write f>> 16 >base 2 CHAR: \s pad-head write ] keep
+ [ " H: " write h>> 16 >base 2 CHAR: \s pad-head write ] keep
+ [ " L: " write l>> 16 >base 2 CHAR: \s pad-head write ] keep
+ [ " A: " write a>> 16 >base 2 CHAR: \s pad-head write ] keep
+ [ " SP: " write sp>> 16 >base 4 CHAR: \s pad-head write ] keep
+ [ " cycles: " write cycles>> number>string 5 CHAR: \s pad-head write ] keep
+ nl drop ;
+
+: register-lookup ( string -- vector )
+ #! Given a string containing a register name, return a vector
+ #! where the 1st item is the getter and the 2nd is the setter
+ #! for that register.
+ H{
+ { "A" { a>> (>>a) } }
+ { "B" { b>> (>>b) } }
+ { "C" { c>> (>>c) } }
+ { "D" { d>> (>>d) } }
+ { "E" { e>> (>>e) } }
+ { "H" { h>> (>>h) } }
+ { "L" { l>> (>>l) } }
+ { "AF" { af>> (>>af) } }
+ { "BC" { bc>> (>>bc) } }
+ { "DE" { de>> (>>de) } }
+ { "HL" { hl>> (>>hl) } }
+ { "SP" { sp>> (>>sp) } }
+ } at ;
+
+
+: flag-lookup ( string -- vector )
+ #! Given a string containing a flag name, return a vector
+ #! where the 1st item is a word that tests that flag.
+ H{
+ { "NZ" { flag-nz? } }
+ { "NC" { flag-nc? } }
+ { "PO" { flag-po? } }
+ { "PE" { flag-pe? } }
+ { "Z" { flag-z? } }
+ { "C" { flag-c? } }
+ { "P" { flag-p? } }
+ { "M" { flag-m? } }
+ } at ;
+
+SYMBOLS: $1 $2 $3 $4 ;
+
+: replace-patterns ( vector tree -- tree )
+ [
+ {
+ { $1 [ first ] }
+ { $2 [ second ] }
+ { $3 [ third ] }
+ { $4 [ fourth ] }
+ [ nip ]
+ } case
+ ] with deep-map ;
+
+: (emulate-RST) ( n cpu -- )
+ #! RST nn
+ [ sp>> 2 - dup ] keep ! sp sp cpu
+ [ (>>sp) ] keep ! sp cpu
+ [ pc>> ] keep ! sp pc cpu
+ swapd [ write-word ] keep ! cpu
+ [ 8 * ] dip (>>pc) ;
+
+: (emulate-CALL) ( cpu -- )
+ #! 205 - CALL nn
+ [ next-word HEX: FFFF bitand ] keep ! addr cpu
+ [ sp>> 2 - dup ] keep ! addr sp sp cpu
+ [ (>>sp) ] keep ! addr sp cpu
+ [ pc>> ] keep ! addr sp pc cpu
+ swapd [ write-word ] keep ! addr cpu
+ (>>pc) ;
+
+: (emulate-RLCA) ( cpu -- )
+ #! The content of the accumulator is rotated left
+ #! one position. The low order bit and the carry flag
+ #! are both set to the value shifd out of the high
+ #! order bit position. Only the carry flag is affected.
+ [ a>> -7 shift ] keep
+ over 0 = [ dup carry-flag clear-flag ] [ dup carry-flag set-flag ] if
+ [ a>> 1 shift HEX: FF bitand ] keep
+ [ bitor ] dip (>>a) ;
+
+: (emulate-RRCA) ( cpu -- )
+ #! The content of the accumulator is rotated right
+ #! one position. The high order bit and the carry flag
+ #! are both set to the value shifd out of the low
+ #! order bit position. Only the carry flag is affected.
+ [ a>> 1 bitand 7 shift ] keep
+ over 0 = [ dup carry-flag clear-flag ] [ dup carry-flag set-flag ] if
+ [ a>> 254 bitand -1 shift ] keep
+ [ bitor ] dip (>>a) ;
+
+: (emulate-RLA) ( cpu -- )
+ #! The content of the accumulator is rotated left
+ #! one position through the carry flag. The low
+ #! order bit is set equal to the carry flag and
+ #! the carry flag is set to the value shifd out
+ #! of the high order bit. Only the carry flag is
+ #! affected.
+ [ carry-flag swap flag-set? [ 1 ] [ 0 ] if ] keep
+ [ a>> 127 bitand 7 shift ] keep
+ dup a>> 128 bitand 0 = [ dup carry-flag clear-flag ] [ dup carry-flag set-flag ] if
+ [ bitor ] dip (>>a) ;
+
+: (emulate-RRA) ( cpu -- )
+ #! The content of the accumulator is rotated right
+ #! one position through the carry flag. The high order
+ #! bit is set to the carry flag and the carry flag is
+ #! set to the value shifd out of the low order bit.
+ #! Only the carry flag is affected.
+ [ carry-flag swap flag-set? [ BIN: 10000000 ] [ 0 ] if ] keep
+ [ a>> 254 bitand -1 shift ] keep
+ dup a>> 1 bitand 0 = [ dup carry-flag clear-flag ] [ dup carry-flag set-flag ] if
+ [ bitor ] dip (>>a) ;
+
+: (emulate-CPL) ( cpu -- )
+ #! The contents of the accumulator are complemented
+ #! (zero bits become one, one bits becomes zero).
+ #! No flags are affected.
+ HEX: FF swap cpu-a-bitxor= ;
+
+: (emulate-DAA) ( cpu -- )
+ #! The eight bit number in the accumulator is
+ #! adjusted to form two four-bit binary-coded-decimal
+ #! digits.
+ [
+ dup half-carry-flag swap flag-set? swap
+ a>> BIN: 1111 bitand 9 > or [ 6 ] [ 0 ] if
+ ] keep
+ [ a>> + ] keep
+ [ update-flags ] 2keep
+ [ swap HEX: FF bitand swap (>>a) ] keep
+ [
+ dup carry-flag swap flag-set? swap
+ a>> -4 shift BIN: 1111 bitand 9 > or [ 96 ] [ 0 ] if
+ ] keep
+ [ a>> + ] keep
+ [ update-flags ] 2keep
+ swap HEX: FF bitand swap (>>a) ;
+
+: patterns ( -- hashtable )
+ #! table of code quotation patterns for each type of instruction.
+ H{
+ { "NOP" [ drop ] }
+ { "RET-NN" [ ret-from-sub ] }
+ { "RST-0" [ 0 swap (emulate-RST) ] }
+ { "RST-8" [ 8 swap (emulate-RST) ] }
+ { "RST-10H" [ HEX: 10 swap (emulate-RST) ] }
+ { "RST-18H" [ HEX: 18 swap (emulate-RST) ] }
+ { "RST-20H" [ HEX: 20 swap (emulate-RST) ] }
+ { "RST-28H" [ HEX: 28 swap (emulate-RST) ] }
+ { "RST-30H" [ HEX: 30 swap (emulate-RST) ] }
+ { "RST-38H" [ HEX: 38 swap (emulate-RST) ] }
+ { "RET-F|FF" [ dup $1 [ 6 over inc-cycles ret-from-sub ] [ drop ] if ] }
+ { "CP-N" [ [ a>> ] keep [ next-byte ] keep sub-byte drop ] }
+ { "CP-R" [ [ a>> ] keep [ $1 ] keep sub-byte drop ] }
+ { "CP-(RR)" [ [ a>> ] keep [ $1 ] keep [ read-byte ] keep sub-byte drop ] }
+ { "OR-N" [ [ a>> ] keep [ next-byte ] keep [ or-byte ] keep (>>a) ] }
+ { "OR-R" [ [ a>> ] keep [ $1 ] keep [ or-byte ] keep (>>a) ] }
+ { "OR-(RR)" [ [ a>> ] keep [ $1 ] keep [ read-byte ] keep [ or-byte ] keep (>>a) ] }
+ { "XOR-N" [ [ a>> ] keep [ next-byte ] keep [ xor-byte ] keep (>>a) ] }
+ { "XOR-R" [ [ a>> ] keep [ $1 ] keep [ xor-byte ] keep (>>a) ] }
+ { "XOR-(RR)" [ [ a>> ] keep [ $1 ] keep [ read-byte ] keep [ xor-byte ] keep (>>a) ] }
+ { "AND-N" [ [ a>> ] keep [ next-byte ] keep [ and-byte ] keep (>>a) ] }
+ { "AND-R" [ [ a>> ] keep [ $1 ] keep [ and-byte ] keep (>>a) ] }
+ { "AND-(RR)" [ [ a>> ] keep [ $1 ] keep [ read-byte ] keep [ and-byte ] keep (>>a) ] }
+ { "ADC-R,N" [ [ $1 ] keep [ next-byte ] keep [ add-byte-with-carry ] keep $2 ] }
+ { "ADC-R,R" [ [ $1 ] keep [ $3 ] keep [ add-byte-with-carry ] keep $2 ] }
+ { "ADC-R,(RR)" [ [ $1 ] keep [ $3 ] keep [ read-byte ] keep [ add-byte-with-carry ] keep $2 ] }
+ { "ADD-R,N" [ [ $1 ] keep [ next-byte ] keep [ add-byte ] keep $2 ] }
+ { "ADD-R,R" [ [ $1 ] keep [ $3 ] keep [ add-byte ] keep $2 ] }
+ { "ADD-RR,RR" [ [ $1 ] keep [ $3 ] keep [ add-word ] keep $2 ] }
+ { "ADD-R,(RR)" [ [ $1 ] keep [ $3 ] keep [ read-byte ] keep [ add-byte ] keep $2 ] }
+ { "SBC-R,N" [ [ $1 ] keep [ next-byte ] keep [ sub-byte-with-carry ] keep $2 ] }
+ { "SBC-R,R" [ [ $1 ] keep [ $3 ] keep [ sub-byte-with-carry ] keep $2 ] }
+ { "SBC-R,(RR)" [ [ $1 ] keep [ $3 ] keep [ read-byte ] keep [ sub-byte-with-carry ] keep $2 ] }
+ { "SUB-R" [ [ a>> ] keep [ $1 ] keep [ sub-byte ] keep (>>a) ] }
+ { "SUB-(RR)" [ [ a>> ] keep [ $1 ] keep [ read-byte ] keep [ sub-byte ] keep (>>a) ] }
+ { "SUB-N" [ [ a>> ] keep [ next-byte ] keep [ sub-byte ] keep (>>a) ] }
+ { "CPL" [ (emulate-CPL) ] }
+ { "DAA" [ (emulate-DAA) ] }
+ { "RLA" [ (emulate-RLA) ] }
+ { "RRA" [ (emulate-RRA) ] }
+ { "CCF" [ carry-flag swap cpu-f-bitxor= ] }
+ { "SCF" [ carry-flag swap cpu-f-bitor= ] }
+ { "RLCA" [ (emulate-RLCA) ] }
+ { "RRCA" [ (emulate-RRCA) ] }
+ { "HALT" [ drop ] }
+ { "DI" [ [ 255 interrupt-flag - ] swap cpu-f-bitand ] }
+ { "EI" [ [ interrupt-flag ] swap cpu-f-bitor ] }
+ { "POP-RR" [ [ pop-sp ] keep $2 ] }
+ { "PUSH-RR" [ [ $1 ] keep push-sp ] }
+ { "INC-R" [ [ $1 ] keep [ inc-byte ] keep $2 ] }
+ { "DEC-R" [ [ $1 ] keep [ dec-byte ] keep $2 ] }
+ { "INC-RR" [ [ $1 ] keep [ inc-word ] keep $2 ] }
+ { "DEC-RR" [ [ $1 ] keep [ dec-word ] keep $2 ] }
+ { "DEC-(RR)" [ [ $1 ] keep [ read-byte ] keep [ dec-byte ] keep [ $1 ] keep write-byte ] }
+ { "INC-(RR)" [ [ $1 ] keep [ read-byte ] keep [ inc-byte ] keep [ $1 ] keep write-byte ] }
+ { "JP-NN" [ [ pc>> ] keep [ read-word ] keep (>>pc) ] }
+ { "JP-F|FF,NN" [ [ $1 ] keep swap [ [ next-word ] keep [ (>>pc) ] keep [ cycles>> ] keep swap 5 + swap (>>cycles) ] [ [ pc>> 2 + ] keep (>>pc) ] if ] }
+ { "JP-(RR)" [ [ $1 ] keep (>>pc) ] }
+ { "CALL-NN" [ (emulate-CALL) ] }
+ { "CALL-F|FF,NN" [ [ $1 ] keep swap [ 7 over inc-cycles (emulate-CALL) ] [ [ pc>> 2 + ] keep (>>pc) ] if ] }
+ { "LD-RR,NN" [ [ next-word ] keep $2 ] }
+ { "LD-RR,RR" [ [ $3 ] keep $2 ] }
+ { "LD-R,N" [ [ next-byte ] keep $2 ] }
+ { "LD-(RR),N" [ [ next-byte ] keep [ $1 ] keep write-byte ] }
+ { "LD-(RR),R" [ [ $3 ] keep [ $1 ] keep write-byte ] }
+ { "LD-R,R" [ [ $3 ] keep $2 ] }
+ { "LD-R,(RR)" [ [ $3 ] keep [ read-byte ] keep $2 ] }
+ { "LD-(NN),RR" [ [ $1 ] keep [ next-word ] keep write-word ] }
+ { "LD-(NN),R" [ [ $1 ] keep [ next-word ] keep write-byte ] }
+ { "LD-RR,(NN)" [ [ next-word ] keep [ read-word ] keep $2 ] }
+ { "LD-R,(NN)" [ [ next-word ] keep [ read-byte ] keep $2 ] }
+ { "OUT-(N),R" [ [ $1 ] keep [ next-byte ] keep write-port ] }
+ { "IN-R,(N)" [ [ next-byte ] keep [ read-port ] keep (>>a) ] }
+ { "EX-(RR),RR" [ [ $1 ] keep [ read-word ] keep [ $3 ] keep [ $1 ] keep [ write-word ] keep $4 ] }
+ { "EX-RR,RR" [ [ $1 ] keep [ $3 ] keep [ $2 ] keep $4 ] }
+ } ;
+
+: 8-bit-registers ( -- parser )
+ #! A parser for 8-bit registers. On a successfull parse the
+ #! parse tree contains a vector. The first item in the vector
+ #! is the getter word for that register with stack effect
+ #! ( cpu -- value ). The second item is the setter word with
+ #! stack effect ( value cpu -- ).
+ <EBNF
+ main=("A" | "B" | "C" | "D" | "E" | "H" | "L") => [[ register-lookup ]]
+ EBNF> ;
+
+: all-flags ( -- parser )
+ #! A parser for 16-bit flags.
+ <EBNF
+ main=("NZ" | "NC" | "PO" | "PE" | "Z" | "C" | "P" | "M") => [[ flag-lookup ]]
+ EBNF> ;
+
+: 16-bit-registers ( -- parser )
+ #! A parser for 16-bit registers. On a successfull parse the
+ #! parse tree contains a vector. The first item in the vector
+ #! is the getter word for that register with stack effect
+ #! ( cpu -- value ). The second item is the setter word with
+ #! stack effect ( value cpu -- ).
+ <EBNF
+ main=("AF" | "BC" | "DE" | "HL" | "SP") => [[ register-lookup ]]
+ EBNF> ;
+
+: all-registers ( -- parser )
+ #! Return a parser that can parse the format
+ #! for 8 bit or 16 bit registers.
+ [ 16-bit-registers , 8-bit-registers , ] choice* ;
+
+: indirect ( parser -- parser )
+ #! Given a parser, return a parser which parses the original
+ #! wrapped in brackets, representing an indirect reference.
+ #! eg. BC -> (BC). The value of the original parser is left in
+ #! the parse tree.
+ "(" ")" surrounded-by ;
+
+: generate-instruction ( vector string -- quot )
+ #! Generate the quotation for an instruction, given the instruction in
+ #! the 'string' and a vector containing the arguments for that instruction.
+ patterns at replace-patterns ;
+
+: simple-instruction ( token -- parser )
+ #! Return a parser for then instruction identified by the token.
+ #! The parser return parses the token only and expects no additional
+ #! arguments to the instruction.
+ token [ '[ { } _ generate-instruction ] ] action ;
+
+: complex-instruction ( type token -- parser )
+ #! Return a parser for an instruction identified by the token.
+ #! The instruction is expected to take additional arguments by
+ #! being combined with other parsers. Then 'type' is used for a lookup
+ #! in a pattern hashtable to return the instruction quotation pattern.
+ token swap [ nip '[ _ generate-instruction ] ] curry action ;
+
+: no-params ( ast -- ast )
+ first { } swap curry ;
+
+: one-param ( ast -- ast )
+ first2 swap curry ;
+
+: two-params ( ast -- ast )
+ first3 append swap curry ;
+
+: NOP-instruction ( -- parser )
+ "NOP" simple-instruction ;
+
+: RET-NN-instruction ( -- parser )
+ [
+ "RET-NN" "RET" complex-instruction ,
+ "nn" token sp hide ,
+ ] seq* [ no-params ] action ;
+
+: RST-0-instruction ( -- parser )
+ [
+ "RST-0" "RST" complex-instruction ,
+ "0" token sp hide ,
+ ] seq* [ no-params ] action ;
+
+: RST-8-instruction ( -- parser )
+ [
+ "RST-8" "RST" complex-instruction ,
+ "8" token sp hide ,
+ ] seq* [ no-params ] action ;
+
+: RST-10H-instruction ( -- parser )
+ [
+ "RST-10H" "RST" complex-instruction ,
+ "10H" token sp hide ,
+ ] seq* [ no-params ] action ;
+
+: RST-18H-instruction ( -- parser )
+ [
+ "RST-18H" "RST" complex-instruction ,
+ "18H" token sp hide ,
+ ] seq* [ no-params ] action ;
+
+: RST-20H-instruction ( -- parser )
+ [
+ "RST-20H" "RST" complex-instruction ,
+ "20H" token sp hide ,
+ ] seq* [ no-params ] action ;
+
+: RST-28H-instruction ( -- parser )
+ [
+ "RST-28H" "RST" complex-instruction ,
+ "28H" token sp hide ,
+ ] seq* [ no-params ] action ;
+
+: RST-30H-instruction ( -- parser )
+ [
+ "RST-30H" "RST" complex-instruction ,
+ "30H" token sp hide ,
+ ] seq* [ no-params ] action ;
+
+: RST-38H-instruction ( -- parser )
+ [
+ "RST-38H" "RST" complex-instruction ,
+ "38H" token sp hide ,
+ ] seq* [ no-params ] action ;
+
+: JP-NN-instruction ( -- parser )
+ [
+ "JP-NN" "JP" complex-instruction ,
+ "nn" token sp hide ,
+ ] seq* [ no-params ] action ;
+
+: JP-F|FF,NN-instruction ( -- parser )
+ [
+ "JP-F|FF,NN" "JP" complex-instruction ,
+ all-flags sp ,
+ ",nn" token hide ,
+ ] seq* [ one-param ] action ;
+
+: JP-(RR)-instruction ( -- parser )
+ [
+ "JP-(RR)" "JP" complex-instruction ,
+ 16-bit-registers indirect sp ,
+ ] seq* [ one-param ] action ;
+
+: CALL-NN-instruction ( -- parser )
+ [
+ "CALL-NN" "CALL" complex-instruction ,
+ "nn" token sp hide ,
+ ] seq* [ no-params ] action ;
+
+: CALL-F|FF,NN-instruction ( -- parser )
+ [
+ "CALL-F|FF,NN" "CALL" complex-instruction ,
+ all-flags sp ,
+ ",nn" token hide ,
+ ] seq* [ one-param ] action ;
+
+: RLCA-instruction ( -- parser )
+ "RLCA" simple-instruction ;
+
+: RRCA-instruction ( -- parser )
+ "RRCA" simple-instruction ;
+
+: HALT-instruction ( -- parser )
+ "HALT" simple-instruction ;
+
+: DI-instruction ( -- parser )
+ "DI" simple-instruction ;
+
+: EI-instruction ( -- parser )
+ "EI" simple-instruction ;
+
+: CPL-instruction ( -- parser )
+ "CPL" simple-instruction ;
+
+: CCF-instruction ( -- parser )
+ "CCF" simple-instruction ;
+
+: SCF-instruction ( -- parser )
+ "SCF" simple-instruction ;
+
+: DAA-instruction ( -- parser )
+ "DAA" simple-instruction ;
+
+: RLA-instruction ( -- parser )
+ "RLA" simple-instruction ;
+
+: RRA-instruction ( -- parser )
+ "RRA" simple-instruction ;
+
+: DEC-R-instruction ( -- parser )
+ [
+ "DEC-R" "DEC" complex-instruction ,
+ 8-bit-registers sp ,
+ ] seq* [ one-param ] action ;
+
+: DEC-RR-instruction ( -- parser )
+ [
+ "DEC-RR" "DEC" complex-instruction ,
+ 16-bit-registers sp ,
+ ] seq* [ one-param ] action ;
+
+: DEC-(RR)-instruction ( -- parser )
+ [
+ "DEC-(RR)" "DEC" complex-instruction ,
+ 16-bit-registers indirect sp ,
+ ] seq* [ one-param ] action ;
+
+: POP-RR-instruction ( -- parser )
+ [
+ "POP-RR" "POP" complex-instruction ,
+ all-registers sp ,
+ ] seq* [ one-param ] action ;
+
+: PUSH-RR-instruction ( -- parser )
+ [
+ "PUSH-RR" "PUSH" complex-instruction ,
+ all-registers sp ,
+ ] seq* [ one-param ] action ;
+
+: INC-R-instruction ( -- parser )
+ [
+ "INC-R" "INC" complex-instruction ,
+ 8-bit-registers sp ,
+ ] seq* [ one-param ] action ;
+
+: INC-RR-instruction ( -- parser )
+ [
+ "INC-RR" "INC" complex-instruction ,
+ 16-bit-registers sp ,
+ ] seq* [ one-param ] action ;
+
+: INC-(RR)-instruction ( -- parser )
+ [
+ "INC-(RR)" "INC" complex-instruction ,
+ all-registers indirect sp ,
+ ] seq* [ one-param ] action ;
+
+: RET-F|FF-instruction ( -- parser )
+ [
+ "RET-F|FF" "RET" complex-instruction ,
+ all-flags sp ,
+ ] seq* [ one-param ] action ;
+
+: AND-N-instruction ( -- parser )
+ [
+ "AND-N" "AND" complex-instruction ,
+ "n" token sp hide ,
+ ] seq* [ no-params ] action ;
+
+: AND-R-instruction ( -- parser )
+ [
+ "AND-R" "AND" complex-instruction ,
+ 8-bit-registers sp ,
+ ] seq* [ one-param ] action ;
+
+: AND-(RR)-instruction ( -- parser )
+ [
+ "AND-(RR)" "AND" complex-instruction ,
+ 16-bit-registers indirect sp ,
+ ] seq* [ one-param ] action ;
+
+: XOR-N-instruction ( -- parser )
+ [
+ "XOR-N" "XOR" complex-instruction ,
+ "n" token sp hide ,
+ ] seq* [ no-params ] action ;
+
+: XOR-R-instruction ( -- parser )
+ [
+ "XOR-R" "XOR" complex-instruction ,
+ 8-bit-registers sp ,
+ ] seq* [ one-param ] action ;
+
+: XOR-(RR)-instruction ( -- parser )
+ [
+ "XOR-(RR)" "XOR" complex-instruction ,
+ 16-bit-registers indirect sp ,
+ ] seq* [ one-param ] action ;
+
+: OR-N-instruction ( -- parser )
+ [
+ "OR-N" "OR" complex-instruction ,
+ "n" token sp hide ,
+ ] seq* [ no-params ] action ;
+
+: OR-R-instruction ( -- parser )
+ [
+ "OR-R" "OR" complex-instruction ,
+ 8-bit-registers sp ,
+ ] seq* [ one-param ] action ;
+
+: OR-(RR)-instruction ( -- parser )
+ [
+ "OR-(RR)" "OR" complex-instruction ,
+ 16-bit-registers indirect sp ,
+ ] seq* [ one-param ] action ;
+
+: CP-N-instruction ( -- parser )
+ [
+ "CP-N" "CP" complex-instruction ,
+ "n" token sp hide ,
+ ] seq* [ no-params ] action ;
+
+: CP-R-instruction ( -- parser )
+ [
+ "CP-R" "CP" complex-instruction ,
+ 8-bit-registers sp ,
+ ] seq* [ one-param ] action ;
+
+: CP-(RR)-instruction ( -- parser )
+ [
+ "CP-(RR)" "CP" complex-instruction ,
+ 16-bit-registers indirect sp ,
+ ] seq* [ one-param ] action ;
+
+: ADC-R,N-instruction ( -- parser )
+ [
+ "ADC-R,N" "ADC" complex-instruction ,
+ 8-bit-registers sp ,
+ ",n" token hide ,
+ ] seq* [ one-param ] action ;
+
+: ADC-R,R-instruction ( -- parser )
+ [
+ "ADC-R,R" "ADC" complex-instruction ,
+ 8-bit-registers sp ,
+ "," token hide ,
+ 8-bit-registers ,
+ ] seq* [ two-params ] action ;
+
+: ADC-R,(RR)-instruction ( -- parser )
+ [
+ "ADC-R,(RR)" "ADC" complex-instruction ,
+ 8-bit-registers sp ,
+ "," token hide ,
+ 16-bit-registers indirect ,
+ ] seq* [ two-params ] action ;
+
+: SBC-R,N-instruction ( -- parser )
+ [
+ "SBC-R,N" "SBC" complex-instruction ,
+ 8-bit-registers sp ,
+ ",n" token hide ,
+ ] seq* [ one-param ] action ;
+
+: SBC-R,R-instruction ( -- parser )
+ [
+ "SBC-R,R" "SBC" complex-instruction ,
+ 8-bit-registers sp ,
+ "," token hide ,
+ 8-bit-registers ,
+ ] seq* [ two-params ] action ;
+
+: SBC-R,(RR)-instruction ( -- parser )
+ [
+ "SBC-R,(RR)" "SBC" complex-instruction ,
+ 8-bit-registers sp ,
+ "," token hide ,
+ 16-bit-registers indirect ,
+ ] seq* [ two-params ] action ;
+
+: SUB-R-instruction ( -- parser )
+ [
+ "SUB-R" "SUB" complex-instruction ,
+ 8-bit-registers sp ,
+ ] seq* [ one-param ] action ;
+
+: SUB-(RR)-instruction ( -- parser )
+ [
+ "SUB-(RR)" "SUB" complex-instruction ,
+ 16-bit-registers indirect sp ,
+ ] seq* [ one-param ] action ;
+
+: SUB-N-instruction ( -- parser )
+ [
+ "SUB-N" "SUB" complex-instruction ,
+ "n" token sp hide ,
+ ] seq* [ no-params ] action ;
+
+: ADD-R,N-instruction ( -- parser )
+ [
+ "ADD-R,N" "ADD" complex-instruction ,
+ 8-bit-registers sp ,
+ ",n" token hide ,
+ ] seq* [ one-param ] action ;
+
+: ADD-R,R-instruction ( -- parser )
+ [
+ "ADD-R,R" "ADD" complex-instruction ,
+ 8-bit-registers sp ,
+ "," token hide ,
+ 8-bit-registers ,
+ ] seq* [ two-params ] action ;
+
+: ADD-RR,RR-instruction ( -- parser )
+ [
+ "ADD-RR,RR" "ADD" complex-instruction ,
+ 16-bit-registers sp ,
+ "," token hide ,
+ 16-bit-registers ,
+ ] seq* [ two-params ] action ;
+
+: ADD-R,(RR)-instruction ( -- parser )
+ [
+ "ADD-R,(RR)" "ADD" complex-instruction ,
+ 8-bit-registers sp ,
+ "," token hide ,
+ 16-bit-registers indirect ,
+ ] seq* [ two-params ] action ;
+
+: LD-RR,NN-instruction ( -- parser )
+ #! LD BC,nn
+ [
+ "LD-RR,NN" "LD" complex-instruction ,
+ 16-bit-registers sp ,
+ ",nn" token hide ,
+ ] seq* [ one-param ] action ;
+
+: LD-R,N-instruction ( -- parser )
+ #! LD B,n
+ [
+ "LD-R,N" "LD" complex-instruction ,
+ 8-bit-registers sp ,
+ ",n" token hide ,
+ ] seq* [ one-param ] action ;
+
+: LD-(RR),N-instruction ( -- parser )
+ [
+ "LD-(RR),N" "LD" complex-instruction ,
+ 16-bit-registers indirect sp ,
+ ",n" token hide ,
+ ] seq* [ one-param ] action ;
+
+: LD-(RR),R-instruction ( -- parser )
+ #! LD (BC),A
+ [
+ "LD-(RR),R" "LD" complex-instruction ,
+ 16-bit-registers indirect sp ,
+ "," token hide ,
+ 8-bit-registers ,
+ ] seq* [ two-params ] action ;
+
+: LD-R,R-instruction ( -- parser )
+ [
+ "LD-R,R" "LD" complex-instruction ,
+ 8-bit-registers sp ,
+ "," token hide ,
+ 8-bit-registers ,
+ ] seq* [ two-params ] action ;
+
+: LD-RR,RR-instruction ( -- parser )
+ [
+ "LD-RR,RR" "LD" complex-instruction ,
+ 16-bit-registers sp ,
+ "," token hide ,
+ 16-bit-registers ,
+ ] seq* [ two-params ] action ;
+
+: LD-R,(RR)-instruction ( -- parser )
+ [
+ "LD-R,(RR)" "LD" complex-instruction ,
+ 8-bit-registers sp ,
+ "," token hide ,
+ 16-bit-registers indirect ,
+ ] seq* [ two-params ] action ;
+
+: LD-(NN),RR-instruction ( -- parser )
+ [
+ "LD-(NN),RR" "LD" complex-instruction ,
+ "nn" token indirect sp hide ,
+ "," token hide ,
+ 16-bit-registers ,
+ ] seq* [ one-param ] action ;
+
+: LD-(NN),R-instruction ( -- parser )
+ [
+ "LD-(NN),R" "LD" complex-instruction ,
+ "nn" token indirect sp hide ,
+ "," token hide ,
+ 8-bit-registers ,
+ ] seq* [ one-param ] action ;
+
+: LD-RR,(NN)-instruction ( -- parser )
+ [
+ "LD-RR,(NN)" "LD" complex-instruction ,
+ 16-bit-registers sp ,
+ "," token hide ,
+ "nn" token indirect hide ,
+ ] seq* [ one-param ] action ;
+
+: LD-R,(NN)-instruction ( -- parser )
+ [
+ "LD-R,(NN)" "LD" complex-instruction ,
+ 8-bit-registers sp ,
+ "," token hide ,
+ "nn" token indirect hide ,
+ ] seq* [ one-param ] action ;
+
+: OUT-(N),R-instruction ( -- parser )
+ [
+ "OUT-(N),R" "OUT" complex-instruction ,
+ "n" token indirect sp hide ,
+ "," token hide ,
+ 8-bit-registers ,
+ ] seq* [ one-param ] action ;
+
+: IN-R,(N)-instruction ( -- parser )
+ [
+ "IN-R,(N)" "IN" complex-instruction ,
+ 8-bit-registers sp ,
+ "," token hide ,
+ "n" token indirect hide ,
+ ] seq* [ one-param ] action ;
+
+: EX-(RR),RR-instruction ( -- parser )
+ [
+ "EX-(RR),RR" "EX" complex-instruction ,
+ 16-bit-registers indirect sp ,
+ "," token hide ,
+ 16-bit-registers ,
+ ] seq* [ two-params ] action ;
+
+: EX-RR,RR-instruction ( -- parser )
+ [
+ "EX-RR,RR" "EX" complex-instruction ,
+ 16-bit-registers sp ,
+ "," token hide ,
+ 16-bit-registers ,
+ ] seq* [ two-params ] action ;
+
+: 8080-generator-parser ( -- parser )
+ [
+ NOP-instruction ,
+ RST-0-instruction ,
+ RST-8-instruction ,
+ RST-10H-instruction ,
+ RST-18H-instruction ,
+ RST-20H-instruction ,
+ RST-28H-instruction ,
+ RST-30H-instruction ,
+ RST-38H-instruction ,
+ JP-F|FF,NN-instruction ,
+ JP-NN-instruction ,
+ JP-(RR)-instruction ,
+ CALL-F|FF,NN-instruction ,
+ CALL-NN-instruction ,
+ CPL-instruction ,
+ CCF-instruction ,
+ SCF-instruction ,
+ DAA-instruction ,
+ RLA-instruction ,
+ RRA-instruction ,
+ RLCA-instruction ,
+ RRCA-instruction ,
+ HALT-instruction ,
+ DI-instruction ,
+ EI-instruction ,
+ AND-N-instruction ,
+ AND-R-instruction ,
+ AND-(RR)-instruction ,
+ XOR-N-instruction ,
+ XOR-R-instruction ,
+ XOR-(RR)-instruction ,
+ OR-N-instruction ,
+ OR-R-instruction ,
+ OR-(RR)-instruction ,
+ CP-N-instruction ,
+ CP-R-instruction ,
+ CP-(RR)-instruction ,
+ DEC-RR-instruction ,
+ DEC-R-instruction ,
+ DEC-(RR)-instruction ,
+ POP-RR-instruction ,
+ PUSH-RR-instruction ,
+ INC-RR-instruction ,
+ INC-R-instruction ,
+ INC-(RR)-instruction ,
+ LD-RR,NN-instruction ,
+ LD-RR,RR-instruction ,
+ LD-R,N-instruction ,
+ LD-R,R-instruction ,
+ LD-(RR),N-instruction ,
+ LD-(RR),R-instruction ,
+ LD-R,(RR)-instruction ,
+ LD-(NN),RR-instruction ,
+ LD-(NN),R-instruction ,
+ LD-RR,(NN)-instruction ,
+ LD-R,(NN)-instruction ,
+ ADC-R,(RR)-instruction ,
+ ADC-R,N-instruction ,
+ ADC-R,R-instruction ,
+ ADD-R,N-instruction ,
+ ADD-R,(RR)-instruction ,
+ ADD-R,R-instruction ,
+ ADD-RR,RR-instruction ,
+ SBC-R,N-instruction ,
+ SBC-R,R-instruction ,
+ SBC-R,(RR)-instruction ,
+ SUB-R-instruction ,
+ SUB-(RR)-instruction ,
+ SUB-N-instruction ,
+ RET-F|FF-instruction ,
+ RET-NN-instruction ,
+ OUT-(N),R-instruction ,
+ IN-R,(N)-instruction ,
+ EX-(RR),RR-instruction ,
+ EX-RR,RR-instruction ,
+ ] choice* [ call( -- quot ) ] action ;
+
+: instruction-quotations ( string -- emulate-quot )
+ #! Given an instruction string, return the emulation quotation for
+ #! it. This will later be expanded to produce the disassembly and
+ #! assembly quotations.
+ 8080-generator-parser parse ;
+
+SYMBOL: last-instruction
+SYMBOL: last-opcode
+
+: parse-instructions ( list -- )
+ #! Process the list of strings, which should make
+ #! up an 8080 instruction, and output a quotation
+ #! that would implement that instruction.
+ dup " " join instruction-quotations
+ [
+ "_" join [ "emulate-" % % ] "" make create-in dup last-instruction global set-at
+ ] dip (( cpu -- )) define-declared ;
+
+SYNTAX: INSTRUCTION: ";" parse-tokens parse-instructions ;
+
+SYNTAX: cycles
+ #! Set the number of cycles for the last instruction that was defined.
+ scan string>number last-opcode global at instruction-cycles set-nth ;
+
+SYNTAX: opcode ( -- )
+ #! Set the opcode number for the last instruction that was defined.
+ last-instruction global at 1quotation scan 16 base>
+ dup last-opcode global set-at set-instruction ;
+
--- /dev/null
+Intel 8080 CPU Emulator
--- /dev/null
+Intel 8080 CPU Emulator
--- /dev/null
+USING: \r
+ accessors\r
+ combinators\r
+ cpu.8080\r
+ cpu.8080.emulator\r
+ io\r
+ io.files\r
+ io.encodings.ascii\r
+ kernel \r
+ math\r
+ math.bits\r
+ sequences\r
+ tools.time\r
+;\r
+IN: cpu.8080.test\r
+\r
+: step ( cpu -- )\r
+ #! Run a single 8080 instruction\r
+ [ read-instruction ] keep ! n cpu\r
+ over get-cycles over inc-cycles\r
+ [ swap instructions nth call( cpu -- ) ] keep\r
+ [ pc>> HEX: FFFF bitand ] keep \r
+ [ (>>pc) ] keep \r
+ process-interrupts ;\r
+\r
+: test-step ( cpu -- cpu )\r
+ [ step ] keep dup cpu. ;\r
+\r
+: invaders ( -- seq )\r
+ {\r
+ { HEX: 0000 "invaders/invaders.h" }\r
+ { HEX: 0800 "invaders/invaders.g" }\r
+ { HEX: 1000 "invaders/invaders.f" }\r
+ { HEX: 1800 "invaders/invaders.e" }\r
+ } ;\r
+\r
+: test-cpu ( -- cpu )\r
+ <cpu> invaders over load-rom* dup cpu. ;\r
+\r
+: test-n ( n -- )\r
+ test-cpu swap [ test-step ] times drop ;\r
+\r
+: run-n ( cpu n -- cpu )\r
+ [ dup step ] times ;\r
+\r
+: each-8bit ( n quot -- )\r
+ [ 8 <bits> ] dip each ; inline\r
+\r
+: >ppm ( cpu filename -- cpu )\r
+ #! Dump the current screen image to a ppm image file with the given name.\r
+ ascii [\r
+ "P3" print\r
+ "256 224" print\r
+ "1" print\r
+ 224 [\r
+ 32 [\r
+ over 32 * over + HEX: 2400 + ! cpu h w addr\r
+ [ pick ] dip swap ram>> nth [\r
+ [\r
+ " 0 0 0" write\r
+ ] [\r
+ " 1 1 1" write\r
+ ] if\r
+ ] each-8bit drop\r
+ ] each drop nl\r
+ ] each\r
+ ] with-file-writer ;\r
+\r
+: time-test ( -- )\r
+ test-cpu [ 1000000 run-n drop ] time ;\r
--- /dev/null
+Chris Double
--- /dev/null
+! Copyright (C) 2007 Chris Double.\r
+! See http://factorcode.org/license.txt for BSD license.\r
+USING: help.syntax help.markup cpu.8080.emulator ;\r
+IN: space-invaders \r
+\r
+HELP: run \r
+{ $description \r
+"Run the Space Invaders emulator in a new window." $nl\r
+{ $link rom-root } " must be set to the directory containing the "\r
+"location of the Space Invaders ROM files. See " \r
+{ $link { "space-invaders" "space-invaders" } } " for details."\r
+} ;\r
+\r
+ARTICLE: { "space-invaders" "space-invaders" } "Space Invaders Emulator"\r
+"Provides an emulation of the original 8080 Arcade Game 'Space Invaders'." $nl\r
+"More information on the arcade game can be obtained from " { $url "http://www.mameworld.net/maws/romset/invaders" } "." $nl\r
+"To play the game you need the ROM files for the arcade game. They should "\r
+"be placed in a directory called 'invaders' in the location specified by "\r
+"the variable " { $link rom-root } ". The specific files needed are:"\r
+{ $list\r
+ "invaders/invaders.e"\r
+ "invaders/invaders.f"\r
+ "invaders/invaders.g"\r
+ "invaders/invaders.h"\r
+}\r
+"These are the same ROM files as used by MAME. To run the game use the " \r
+{ $link run } " word." $nl\r
+"Keys:" \r
+{ $table\r
+ { "Backspace" "Insert Coin" }\r
+ { "1" "1 Player" }\r
+ { "2" "2 Player" }\r
+ { "Left" "Move Left" }\r
+ { "Right" "Move Right" }\r
+ { "Up" "Fire" }\r
+}\r
+"If you save the Factor image while a game is running, when you restart "\r
+"the image the game continues where it left off." ;\r
+\r
+ABOUT: { "space-invaders" "space-invaders" } \r
--- /dev/null
+! Copyright (C) 2006 Chris Double.
+! See http://factorcode.org/license.txt for BSD license.
+!
+USING:
+ accessors
+ alien.c-types
+ alien.data
+ arrays
+ byte-arrays
+ calendar
+ combinators
+ cpu.8080
+ cpu.8080.emulator
+ io.files
+ kernel
+ math
+ openal
+ opengl.gl
+ sequences
+ ui
+ ui.gadgets
+ ui.gestures
+ ui.render
+;
+QUALIFIED: threads
+QUALIFIED: system
+IN: space-invaders
+
+<<
+ "uchar" require-c-array
+>>
+
+TUPLE: space-invaders < cpu port1 port2i port2o port3o port4lo port4hi port5o bitmap sounds looping? ;
+CONSTANT: game-width 224
+CONSTANT: game-height 256
+
+: make-opengl-bitmap ( -- array )
+ game-height game-width 3 * * uchar <c-array> ;
+
+: bitmap-index ( point -- index )
+ #! Point is a {x y}.
+ first2 game-width 3 * * swap 3 * + ;
+
+: set-bitmap-pixel ( color point array -- )
+ #! 'color' is a {r g b}. Point is {x y}.
+ [ bitmap-index ] dip ! color index array
+ [ [ first ] 2dip set-nth ] 3keep
+ [ [ second ] 2dip [ 1 + ] dip set-nth ] 3keep
+ [ third ] 2dip [ 2 + ] dip set-nth ;
+
+: get-bitmap-pixel ( point array -- color )
+ #! Point is a {x y}. color is a {r g b}
+ [ bitmap-index ] dip
+ [ nth ] 2keep
+ [ [ 1 + ] dip nth ] 2keep
+ [ 2 + ] dip nth 3array ;
+
+CONSTANT: SOUND-SHOT 0
+CONSTANT: SOUND-UFO 1
+CONSTANT: SOUND-BASE-HIT 2
+CONSTANT: SOUND-INVADER-HIT 3
+CONSTANT: SOUND-WALK1 4
+CONSTANT: SOUND-WALK2 5
+CONSTANT: SOUND-WALK3 6
+CONSTANT: SOUND-WALK4 7
+CONSTANT: SOUND-UFO-HIT 8
+
+: init-sound ( index cpu filename -- )
+ swapd [ sounds>> nth AL_BUFFER ] dip
+ create-buffer-from-wav set-source-param ;
+
+: init-sounds ( cpu -- )
+ init-openal
+ [ 9 gen-sources swap (>>sounds) ] keep
+ [ SOUND-SHOT "resource:extra/space-invaders/resources/Shot.wav" init-sound ] keep
+ [ SOUND-UFO "resource:extra/space-invaders/resources/Ufo.wav" init-sound ] keep
+ [ sounds>> SOUND-UFO swap nth AL_LOOPING AL_TRUE set-source-param ] keep
+ [ SOUND-BASE-HIT "resource:extra/space-invaders/resources/BaseHit.wav" init-sound ] keep
+ [ SOUND-INVADER-HIT "resource:extra/space-invaders/resources/InvHit.wav" init-sound ] keep
+ [ SOUND-WALK1 "resource:extra/space-invaders/resources/Walk1.wav" init-sound ] keep
+ [ SOUND-WALK2 "resource:extra/space-invaders/resources/Walk2.wav" init-sound ] keep
+ [ SOUND-WALK3 "resource:extra/space-invaders/resources/Walk3.wav" init-sound ] keep
+ [ SOUND-WALK4 "resource:extra/space-invaders/resources/Walk4.wav" init-sound ] keep
+ [ SOUND-UFO-HIT "resource:extra/space-invaders/resources/UfoHit.wav" init-sound ] keep
+ f swap (>>looping?) ;
+
+: <space-invaders> ( -- cpu )
+ space-invaders new
+ make-opengl-bitmap over (>>bitmap)
+ [ init-sounds ] keep
+ [ reset ] keep ;
+
+: play-invaders-sound ( cpu sound -- )
+ swap sounds>> nth source-play ;
+
+: stop-invaders-sound ( cpu sound -- )
+ swap sounds>> nth source-stop ;
+
+: read-port1 ( cpu -- byte )
+ #! Port 1 maps the keys for space invaders
+ #! Bit 0 = coin slot
+ #! Bit 1 = two players button
+ #! Bit 2 = one player button
+ #! Bit 4 = player one fire
+ #! Bit 5 = player one left
+ #! Bit 6 = player one right
+ [ port1>> dup HEX: FE bitand ] keep
+ (>>port1) ;
+
+: read-port2 ( cpu -- byte )
+ #! Port 2 maps player 2 controls and dip switches
+ #! Bit 0,1 = number of ships
+ #! Bit 2 = mode (1=easy, 0=hard)
+ #! Bit 4 = player two fire
+ #! Bit 5 = player two left
+ #! Bit 6 = player two right
+ #! Bit 7 = show or hide coin info
+ [ port2i>> HEX: 8F bitand ] keep
+ port1>> HEX: 70 bitand bitor ;
+
+: read-port3 ( cpu -- byte )
+ #! Used to compute a special formula
+ [ port4hi>> 8 shift ] keep
+ [ port4lo>> bitor ] keep
+ port2o>> shift -8 shift HEX: FF bitand ;
+
+M: space-invaders read-port ( port cpu -- byte )
+ #! Read a byte from the hardware port. 'port' should
+ #! be an 8-bit value.
+ swap {
+ { 1 [ read-port1 ] }
+ { 2 [ read-port2 ] }
+ { 3 [ read-port3 ] }
+ [ 2drop 0 ]
+ } case ;
+
+: write-port2 ( value cpu -- )
+ #! Setting this value affects the value read from port 3
+ (>>port2o) ;
+
+: bit-newly-set? ( old-value new-value bit -- bool )
+ tuck bit? [ bit? not ] dip and ;
+
+: port3-newly-set? ( new-value cpu bit -- bool )
+ [ port3o>> swap ] dip bit-newly-set? ;
+
+: port5-newly-set? ( new-value cpu bit -- bool )
+ [ port5o>> swap ] dip bit-newly-set? ;
+
+: write-port3 ( value cpu -- )
+ #! Connected to the sound hardware
+ #! Bit 0 = spaceship sound (looped)
+ #! Bit 1 = Shot
+ #! Bit 2 = Your ship hit
+ #! Bit 3 = Invader hit
+ #! Bit 4 = Extended play sound
+ over 0 bit? over looping?>> not and [
+ dup SOUND-UFO play-invaders-sound
+ t over (>>looping?)
+ ] when
+ over 0 bit? not over looping?>> and [
+ dup SOUND-UFO stop-invaders-sound
+ f over (>>looping?)
+ ] when
+ 2dup 0 port3-newly-set? [ dup SOUND-UFO play-invaders-sound ] when
+ 2dup 1 port3-newly-set? [ dup SOUND-SHOT play-invaders-sound ] when
+ 2dup 2 port3-newly-set? [ dup SOUND-BASE-HIT play-invaders-sound ] when
+ 2dup 3 port3-newly-set? [ dup SOUND-INVADER-HIT play-invaders-sound ] when
+ (>>port3o) ;
+
+: write-port4 ( value cpu -- )
+ #! Affects the value returned by reading port 3
+ [ port4hi>> ] keep
+ [ (>>port4lo) ] keep
+ (>>port4hi) ;
+
+: write-port5 ( value cpu -- )
+ #! Plays sounds
+ #! Bit 0 = invaders sound 1
+ #! Bit 1 = invaders sound 2
+ #! Bit 2 = invaders sound 3
+ #! Bit 3 = invaders sound 4
+ #! Bit 4 = spaceship hit
+ #! Bit 5 = amplifier enabled/disabled
+ 2dup 0 port5-newly-set? [ dup SOUND-WALK1 play-invaders-sound ] when
+ 2dup 1 port5-newly-set? [ dup SOUND-WALK2 play-invaders-sound ] when
+ 2dup 2 port5-newly-set? [ dup SOUND-WALK3 play-invaders-sound ] when
+ 2dup 3 port5-newly-set? [ dup SOUND-WALK4 play-invaders-sound ] when
+ 2dup 4 port5-newly-set? [ dup SOUND-UFO-HIT play-invaders-sound ] when
+ (>>port5o) ;
+
+M: space-invaders write-port ( value port cpu -- )
+ #! Write a byte to the hardware port, where 'port' is
+ #! an 8-bit value.
+ swap {
+ { 2 [ write-port2 ] }
+ { 3 [ write-port3 ] }
+ { 4 [ write-port4 ] }
+ { 5 [ write-port5 ] }
+ [ 3drop ]
+ } case ;
+
+M: space-invaders reset ( cpu -- )
+ dup call-next-method
+ 0 >>port1
+ 0 >>port2i
+ 0 >>port2o
+ 0 >>port3o
+ 0 >>port4lo
+ 0 >>port4hi
+ 0 >>port5o
+ drop ;
+
+: gui-step ( cpu -- )
+ [ read-instruction ] keep ! n cpu
+ over get-cycles over inc-cycles
+ [ swap instructions nth call( cpu -- ) ] keep
+ [ pc>> HEX: FFFF bitand ] keep
+ (>>pc) ;
+
+: gui-frame/2 ( cpu -- )
+ [ gui-step ] keep
+ [ cycles>> ] keep
+ over 16667 < [ ! cycles cpu
+ nip gui-frame/2
+ ] [
+ [ [ 16667 - ] dip (>>cycles) ] keep
+ dup last-interrupt>> HEX: 10 = [
+ HEX: 08 over (>>last-interrupt) HEX: 08 swap interrupt
+ ] [
+ HEX: 10 over (>>last-interrupt) HEX: 10 swap interrupt
+ ] if
+ ] if ;
+
+: gui-frame ( cpu -- )
+ dup gui-frame/2 gui-frame/2 ;
+
+: coin-down ( cpu -- )
+ [ port1>> 1 bitor ] keep (>>port1) ;
+
+: coin-up ( cpu -- )
+ [ port1>> 255 1 - bitand ] keep (>>port1) ;
+
+: player1-down ( cpu -- )
+ [ port1>> 4 bitor ] keep (>>port1) ;
+
+: player1-up ( cpu -- )
+ [ port1>> 255 4 - bitand ] keep (>>port1) ;
+
+: player2-down ( cpu -- )
+ [ port1>> 2 bitor ] keep (>>port1) ;
+
+: player2-up ( cpu -- )
+ [ port1>> 255 2 - bitand ] keep (>>port1) ;
+
+: fire-down ( cpu -- )
+ [ port1>> HEX: 10 bitor ] keep (>>port1) ;
+
+: fire-up ( cpu -- )
+ [ port1>> 255 HEX: 10 - bitand ] keep (>>port1) ;
+
+: left-down ( cpu -- )
+ [ port1>> HEX: 20 bitor ] keep (>>port1) ;
+
+: left-up ( cpu -- )
+ [ port1>> 255 HEX: 20 - bitand ] keep (>>port1) ;
+
+: right-down ( cpu -- )
+ [ port1>> HEX: 40 bitor ] keep (>>port1) ;
+
+: right-up ( cpu -- )
+ [ port1>> 255 HEX: 40 - bitand ] keep (>>port1) ;
+
+
+TUPLE: invaders-gadget < gadget cpu quit? ;
+
+invaders-gadget H{
+ { T{ key-down f f "ESC" } [ t swap (>>quit?) ] }
+ { T{ key-down f f "BACKSPACE" } [ cpu>> coin-down ] }
+ { T{ key-up f f "BACKSPACE" } [ cpu>> coin-up ] }
+ { T{ key-down f f "1" } [ cpu>> player1-down ] }
+ { T{ key-up f f "1" } [ cpu>> player1-up ] }
+ { T{ key-down f f "2" } [ cpu>> player2-down ] }
+ { T{ key-up f f "2" } [ cpu>> player2-up ] }
+ { T{ key-down f f "UP" } [ cpu>> fire-down ] }
+ { T{ key-up f f "UP" } [ cpu>> fire-up ] }
+ { T{ key-down f f "LEFT" } [ cpu>> left-down ] }
+ { T{ key-up f f "LEFT" } [ cpu>> left-up ] }
+ { T{ key-down f f "RIGHT" } [ cpu>> right-down ] }
+ { T{ key-up f f "RIGHT" } [ cpu>> right-up ] }
+ } set-gestures
+
+: <invaders-gadget> ( cpu -- gadget )
+ invaders-gadget new
+ swap >>cpu
+ f >>quit? ;
+
+M: invaders-gadget pref-dim* drop { 224 256 } ;
+
+M: invaders-gadget draw-gadget* ( gadget -- )
+ 0 0 glRasterPos2i
+ 1.0 -1.0 glPixelZoom
+ [ 224 256 GL_RGB GL_UNSIGNED_BYTE ] dip
+ cpu>> bitmap>> glDrawPixels ;
+
+CONSTANT: black { 0 0 0 }
+CONSTANT: white { 255 255 255 }
+CONSTANT: green { 0 255 0 }
+CONSTANT: red { 255 0 0 }
+
+: addr>xy ( addr -- point )
+ #! Convert video RAM address to base X Y value. point is a {x y}.
+ HEX: 2400 - ! n
+ dup HEX: 1f bitand 8 * 255 swap - ! n y
+ swap -5 shift swap 2array ;
+
+: plot-bitmap-pixel ( bitmap point color -- )
+ #! point is a {x y}. color is a {r g b}.
+ spin set-bitmap-pixel ;
+
+: within ( n a b -- bool )
+ #! n >= a and n <= b
+ rot tuck swap <= [ swap >= ] dip and ;
+
+: get-point-color ( point -- color )
+ #! Return the color to use for the given x/y position.
+ first2
+ {
+ { [ dup 184 238 within pick 0 223 within and ] [ 2drop green ] }
+ { [ dup 240 247 within pick 16 133 within and ] [ 2drop green ] }
+ { [ dup 247 215 - 247 184 - within pick 0 223 within and ] [ 2drop red ] }
+ [ 2drop white ]
+ } cond ;
+
+: plot-bitmap-bits ( bitmap point byte bit -- )
+ #! point is a {x y}.
+ [ first2 ] 2dip
+ dup swapd -1 * shift 1 bitand 0 =
+ [ - 2array ] dip
+ [ black ] [ dup get-point-color ] if
+ plot-bitmap-pixel ;
+
+: do-bitmap-update ( bitmap value addr -- )
+ addr>xy swap
+ [ 0 plot-bitmap-bits ] 3keep
+ [ 1 plot-bitmap-bits ] 3keep
+ [ 2 plot-bitmap-bits ] 3keep
+ [ 3 plot-bitmap-bits ] 3keep
+ [ 4 plot-bitmap-bits ] 3keep
+ [ 5 plot-bitmap-bits ] 3keep
+ [ 6 plot-bitmap-bits ] 3keep
+ 7 plot-bitmap-bits ;
+
+M: space-invaders update-video ( value addr cpu -- )
+ over HEX: 2400 >= [
+ bitmap>> -rot do-bitmap-update
+ ] [
+ 3drop
+ ] if ;
+
+: sync-frame ( millis -- millis )
+ #! Sleep until the time for the next frame arrives.
+ 1000 60 / >fixnum + system:millis - dup 0 >
+ [ milliseconds threads:sleep ] [ drop threads:yield ] if system:millis ;
+
+: invaders-process ( millis gadget -- )
+ #! Run a space invaders gadget inside a
+ #! concurrent process. Messages can be sent to
+ #! signal key presses, etc.
+ dup quit?>> [
+ 2drop
+ ] [
+ [ sync-frame ] dip
+ [ cpu>> gui-frame ] keep
+ [ relayout-1 ] keep
+ invaders-process
+ ] if ;
+
+M: invaders-gadget graft* ( gadget -- )
+ dup cpu>> init-sounds
+ f over (>>quit?)
+ [ system:millis swap invaders-process ] curry
+ "Space invaders" threads:spawn drop ;
+
+M: invaders-gadget ungraft* ( gadget -- )
+ t swap (>>quit?) ;
+
+: (run) ( title cpu rom-info -- )
+ over load-rom* <invaders-gadget> swap open-window ;
+
+: run ( -- )
+ [
+ "Space Invaders" <space-invaders> {
+ { HEX: 0000 "invaders/invaders.h" }
+ { HEX: 0800 "invaders/invaders.g" }
+ { HEX: 1000 "invaders/invaders.f" }
+ { HEX: 1800 "invaders/invaders.e" }
+ }
+ (run)
+ ] with-ui ;
+
+MAIN: run
--- /dev/null
+Intel 8080-based Space Invaders arcade machine emulator
--- /dev/null
+demos
+games
+applications
+++ /dev/null
-Chris Double
+++ /dev/null
-! Copyright (C) 2007 Chris Double.\r
-! See http://factorcode.org/license.txt for BSD license.\r
-USING: help.syntax help.markup cpu.8080.emulator ;\r
-IN: space-invaders \r
-\r
-HELP: run \r
-{ $description \r
-"Run the Space Invaders emulator in a new window." $nl\r
-{ $link rom-root } " must be set to the directory containing the "\r
-"location of the Space Invaders ROM files. See " \r
-{ $link { "space-invaders" "space-invaders" } } " for details."\r
-} ;\r
-\r
-ARTICLE: { "space-invaders" "space-invaders" } "Space Invaders Emulator"\r
-"Provides an emulation of the original 8080 Arcade Game 'Space Invaders'." $nl\r
-"More information on the arcade game can be obtained from " { $url "http://www.mameworld.net/maws/romset/invaders" } "." $nl\r
-"To play the game you need the ROM files for the arcade game. They should "\r
-"be placed in a directory called 'invaders' in the location specified by "\r
-"the variable " { $link rom-root } ". The specific files needed are:"\r
-{ $list\r
- "invaders/invaders.e"\r
- "invaders/invaders.f"\r
- "invaders/invaders.g"\r
- "invaders/invaders.h"\r
-}\r
-"These are the same ROM files as used by MAME. To run the game use the " \r
-{ $link run } " word." $nl\r
-"Keys:" \r
-{ $table\r
- { "Backspace" "Insert Coin" }\r
- { "1" "1 Player" }\r
- { "2" "2 Player" }\r
- { "Left" "Move Left" }\r
- { "Right" "Move Right" }\r
- { "Up" "Fire" }\r
-}\r
-"If you save the Factor image while a game is running, when you restart "\r
-"the image the game continues where it left off." ;\r
-\r
-ABOUT: { "space-invaders" "space-invaders" } \r
+++ /dev/null
-! Copyright (C) 2006 Chris Double.
-! See http://factorcode.org/license.txt for BSD license.
-!
-USING: cpu.8080 cpu.8080.emulator openal math alien.c-types
-sequences kernel shuffle arrays io.files combinators ui.gestures
-ui.gadgets ui.render opengl.gl system match
-ui byte-arrays combinators.lib qualified ;
-QUALIFIED: threads
-IN: space-invaders
-
-TUPLE: space-invaders port1 port2i port2o port3o port4lo port4hi port5o bitmap sounds looping? ;
-: game-width 224 ; inline
-: game-height 256 ; inline
-
-: make-opengl-bitmap ( -- array )
- game-height game-width 3 * * <byte-array> ;
-
-: bitmap-index ( point -- index )
- #! Point is a {x y}.
- first2 game-width 3 * * swap 3 * + ;
-
-: set-bitmap-pixel ( color point array -- )
- #! 'color' is a {r g b}. Point is {x y}.
- [ bitmap-index ] dip ! color index array
- [ [ first ] 2dip set-uchar-nth ] 3keep
- [ [ second ] 2dip [ 1 + ] dip set-uchar-nth ] 3keep
- [ third ] 2dip [ 2 + ] dip set-uchar-nth ;
-
-: get-bitmap-pixel ( point array -- color )
- #! Point is a {x y}. color is a {r g b}
- [ bitmap-index ] dip
- [ uint-nth ] 2keep
- [ [ 1 + ] dip uchar-nth ] 2keep
- [ 2 + ] dip uchar-nth 3array ;
-
-: SOUND-SHOT ( -- number ) 0 ;
-: SOUND-UFO ( -- number ) 1 ;
-: SOUND-BASE-HIT ( -- number ) 2 ;
-: SOUND-INVADER-HIT ( -- number ) 3 ;
-: SOUND-WALK1 ( -- number ) 4 ;
-: SOUND-WALK2 ( -- number ) 5 ;
-: SOUND-WALK3 ( -- number ) 6 ;
-: SOUND-WALK4 ( -- number ) 7 ;
-: SOUND-UFO-HIT ( -- number ) 8 ;
-
-: init-sound ( index cpu filename -- )
- swapd >r space-invaders-sounds nth AL_BUFFER r>
- create-buffer-from-wav set-source-param ;
-
-: init-sounds ( cpu -- )
- init-openal
- [ 9 gen-sources swap set-space-invaders-sounds ] keep
- [ SOUND-SHOT "resource:extra/space-invaders/resources/Shot.wav" init-sound ] keep
- [ SOUND-UFO "resource:extra/space-invaders/resources/Ufo.wav" init-sound ] keep
- [ space-invaders-sounds SOUND-UFO swap nth AL_LOOPING AL_TRUE set-source-param ] keep
- [ SOUND-BASE-HIT "resource:extra/space-invaders/resources/BaseHit.wav" init-sound ] keep
- [ SOUND-INVADER-HIT "resource:extra/space-invaders/resources/InvHit.wav" init-sound ] keep
- [ SOUND-WALK1 "resource:extra/space-invaders/resources/Walk1.wav" init-sound ] keep
- [ SOUND-WALK2 "resource:extra/space-invaders/resources/Walk2.wav" init-sound ] keep
- [ SOUND-WALK3 "resource:extra/space-invaders/resources/Walk3.wav" init-sound ] keep
- [ SOUND-WALK4 "resource:extra/space-invaders/resources/Walk4.wav" init-sound ] keep
- [ SOUND-UFO-HIT "resource:extra/space-invaders/resources/UfoHit.wav" init-sound ] keep
- f swap set-space-invaders-looping? ;
-
-: <space-invaders> ( -- cpu )
- <cpu> space-invaders construct-delegate
- make-opengl-bitmap over set-space-invaders-bitmap
- [ init-sounds ] keep
- [ reset ] keep ;
-
-: play-invaders-sound ( cpu sound -- )
- swap space-invaders-sounds nth source-play ;
-
-: stop-invaders-sound ( cpu sound -- )
- swap space-invaders-sounds nth source-stop ;
-
-: read-port1 ( cpu -- byte )
- #! Port 1 maps the keys for space invaders
- #! Bit 0 = coin slot
- #! Bit 1 = two players button
- #! Bit 2 = one player button
- #! Bit 4 = player one fire
- #! Bit 5 = player one left
- #! Bit 6 = player one right
- [ space-invaders-port1 dup HEX: FE bitand ] keep
- set-space-invaders-port1 ;
-
-: read-port2 ( cpu -- byte )
- #! Port 2 maps player 2 controls and dip switches
- #! Bit 0,1 = number of ships
- #! Bit 2 = mode (1=easy, 0=hard)
- #! Bit 4 = player two fire
- #! Bit 5 = player two left
- #! Bit 6 = player two right
- #! Bit 7 = show or hide coin info
- [ space-invaders-port2i HEX: 8F bitand ] keep
- space-invaders-port1 HEX: 70 bitand bitor ;
-
-: read-port3 ( cpu -- byte )
- #! Used to compute a special formula
- [ space-invaders-port4hi 8 shift ] keep
- [ space-invaders-port4lo bitor ] keep
- space-invaders-port2o shift -8 shift HEX: FF bitand ;
-
-M: space-invaders read-port ( port cpu -- byte )
- #! Read a byte from the hardware port. 'port' should
- #! be an 8-bit value.
- swap {
- { 1 [ read-port1 ] }
- { 2 [ read-port2 ] }
- { 3 [ read-port3 ] }
- [ 2drop 0 ]
- } case ;
-
-: write-port2 ( value cpu -- )
- #! Setting this value affects the value read from port 3
- set-space-invaders-port2o ;
-
-: bit-newly-set? ( old-value new-value bit -- bool )
- tuck bit? >r bit? not r> and ;
-
-: port3-newly-set? ( new-value cpu bit -- bool )
- >r space-invaders-port3o swap r> bit-newly-set? ;
-
-: port5-newly-set? ( new-value cpu bit -- bool )
- >r space-invaders-port5o swap r> bit-newly-set? ;
-
-: write-port3 ( value cpu -- )
- #! Connected to the sound hardware
- #! Bit 0 = spaceship sound (looped)
- #! Bit 1 = Shot
- #! Bit 2 = Your ship hit
- #! Bit 3 = Invader hit
- #! Bit 4 = Extended play sound
- over 0 bit? over space-invaders-looping? not and [
- dup SOUND-UFO play-invaders-sound
- t over set-space-invaders-looping?
- ] when
- over 0 bit? not over space-invaders-looping? and [
- dup SOUND-UFO stop-invaders-sound
- f over set-space-invaders-looping?
- ] when
- 2dup 0 port3-newly-set? [ dup SOUND-UFO play-invaders-sound ] when
- 2dup 1 port3-newly-set? [ dup SOUND-SHOT play-invaders-sound ] when
- 2dup 2 port3-newly-set? [ dup SOUND-BASE-HIT play-invaders-sound ] when
- 2dup 3 port3-newly-set? [ dup SOUND-INVADER-HIT play-invaders-sound ] when
- set-space-invaders-port3o ;
-
-: write-port4 ( value cpu -- )
- #! Affects the value returned by reading port 3
- [ space-invaders-port4hi ] keep
- [ set-space-invaders-port4lo ] keep
- set-space-invaders-port4hi ;
-
-: write-port5 ( value cpu -- )
- #! Plays sounds
- #! Bit 0 = invaders sound 1
- #! Bit 1 = invaders sound 2
- #! Bit 2 = invaders sound 3
- #! Bit 3 = invaders sound 4
- #! Bit 4 = spaceship hit
- #! Bit 5 = amplifier enabled/disabled
- 2dup 0 port5-newly-set? [ dup SOUND-WALK1 play-invaders-sound ] when
- 2dup 1 port5-newly-set? [ dup SOUND-WALK2 play-invaders-sound ] when
- 2dup 2 port5-newly-set? [ dup SOUND-WALK3 play-invaders-sound ] when
- 2dup 3 port5-newly-set? [ dup SOUND-WALK4 play-invaders-sound ] when
- 2dup 4 port5-newly-set? [ dup SOUND-UFO-HIT play-invaders-sound ] when
- set-space-invaders-port5o ;
-
-M: space-invaders write-port ( value port cpu -- )
- #! Write a byte to the hardware port, where 'port' is
- #! an 8-bit value.
- swap {
- { 2 [ write-port2 ] }
- { 3 [ write-port3 ] }
- { 4 [ write-port4 ] }
- { 5 [ write-port5 ] }
- [ 3drop ]
- } case ;
-
-M: space-invaders reset ( cpu -- )
- [ delegate reset ] keep
- [ 0 swap set-space-invaders-port1 ] keep
- [ 0 swap set-space-invaders-port2i ] keep
- [ 0 swap set-space-invaders-port2o ] keep
- [ 0 swap set-space-invaders-port3o ] keep
- [ 0 swap set-space-invaders-port4lo ] keep
- [ 0 swap set-space-invaders-port4hi ] keep
- 0 swap set-space-invaders-port5o ;
-
-: gui-step ( cpu -- )
- [ read-instruction ] keep ! n cpu
- over get-cycles over inc-cycles
- [ swap instructions case ] keep
- [ cpu-pc HEX: FFFF bitand ] keep
- set-cpu-pc ;
-
-: gui-frame/2 ( cpu -- )
- [ gui-step ] keep
- [ cpu-cycles ] keep
- over 16667 < [ ! cycles cpu
- nip gui-frame/2
- ] [
- [ >r 16667 - r> set-cpu-cycles ] keep
- dup cpu-last-interrupt HEX: 10 = [
- HEX: 08 over set-cpu-last-interrupt HEX: 08 swap interrupt
- ] [
- HEX: 10 over set-cpu-last-interrupt HEX: 10 swap interrupt
- ] if
- ] if ;
-
-: gui-frame ( cpu -- )
- dup gui-frame/2 gui-frame/2 ;
-
-: coin-down ( cpu -- )
- [ space-invaders-port1 1 bitor ] keep set-space-invaders-port1 ;
-
-: coin-up ( cpu -- )
- [ space-invaders-port1 255 1 - bitand ] keep set-space-invaders-port1 ;
-
-: player1-down ( cpu -- )
- [ space-invaders-port1 4 bitor ] keep set-space-invaders-port1 ;
-
-: player1-up ( cpu -- )
- [ space-invaders-port1 255 4 - bitand ] keep set-space-invaders-port1 ;
-
-: player2-down ( cpu -- )
- [ space-invaders-port1 2 bitor ] keep set-space-invaders-port1 ;
-
-: player2-up ( cpu -- )
- [ space-invaders-port1 255 2 - bitand ] keep set-space-invaders-port1 ;
-
-: fire-down ( cpu -- )
- [ space-invaders-port1 HEX: 10 bitor ] keep set-space-invaders-port1 ;
-
-: fire-up ( cpu -- )
- [ space-invaders-port1 255 HEX: 10 - bitand ] keep set-space-invaders-port1 ;
-
-: left-down ( cpu -- )
- [ space-invaders-port1 HEX: 20 bitor ] keep set-space-invaders-port1 ;
-
-: left-up ( cpu -- )
- [ space-invaders-port1 255 HEX: 20 - bitand ] keep set-space-invaders-port1 ;
-
-: right-down ( cpu -- )
- [ space-invaders-port1 HEX: 40 bitor ] keep set-space-invaders-port1 ;
-
-: right-up ( cpu -- )
- [ space-invaders-port1 255 HEX: 40 - bitand ] keep set-space-invaders-port1 ;
-
-
-TUPLE: invaders-gadget cpu quit? ;
-
-invaders-gadget H{
- { T{ key-down f f "ESC" } [ t swap set-invaders-gadget-quit? ] }
- { T{ key-down f f "BACKSPACE" } [ invaders-gadget-cpu coin-down ] }
- { T{ key-up f f "BACKSPACE" } [ invaders-gadget-cpu coin-up ] }
- { T{ key-down f f "1" } [ invaders-gadget-cpu player1-down ] }
- { T{ key-up f f "1" } [ invaders-gadget-cpu player1-up ] }
- { T{ key-down f f "2" } [ invaders-gadget-cpu player2-down ] }
- { T{ key-up f f "2" } [ invaders-gadget-cpu player2-up ] }
- { T{ key-down f f "UP" } [ invaders-gadget-cpu fire-down ] }
- { T{ key-up f f "UP" } [ invaders-gadget-cpu fire-up ] }
- { T{ key-down f f "LEFT" } [ invaders-gadget-cpu left-down ] }
- { T{ key-up f f "LEFT" } [ invaders-gadget-cpu left-up ] }
- { T{ key-down f f "RIGHT" } [ invaders-gadget-cpu right-down ] }
- { T{ key-up f f "RIGHT" } [ invaders-gadget-cpu right-up ] }
- } set-gestures
-
-: <invaders-gadget> ( cpu -- gadget )
- invaders-gadget construct-gadget
- [ set-invaders-gadget-cpu ] keep
- f over set-invaders-gadget-quit? ;
-
-M: invaders-gadget pref-dim* drop { 224 256 0 } ;
-
-M: invaders-gadget draw-gadget* ( gadget -- )
- 0 0 glRasterPos2i
- 1.0 -1.0 glPixelZoom
- >r 224 256 GL_RGB GL_UNSIGNED_BYTE r>
- invaders-gadget-cpu space-invaders-bitmap glDrawPixels ;
-
-: black { 0 0 0 } ;
-: white { 255 255 255 } ;
-: green { 0 255 0 } ;
-: red { 255 0 0 } ;
-
-: addr>xy ( addr -- point )
- #! Convert video RAM address to base X Y value. point is a {x y}.
- HEX: 2400 - ! n
- dup HEX: 1f bitand 8 * 255 swap - ! n y
- swap -5 shift swap 2array ;
-
-: plot-bitmap-pixel ( bitmap point color -- )
- #! point is a {x y}. color is a {r g b}.
- spin set-bitmap-pixel ;
-
-: within ( n a b -- bool )
- #! n >= a and n <= b
- rot tuck swap <= >r swap >= r> and ;
-
-: get-point-color ( point -- color )
- #! Return the color to use for the given x/y position.
- first2
- {
- { [ dup 184 238 within pick 0 223 within and ] [ 2drop green ] }
- { [ dup 240 247 within pick 16 133 within and ] [ 2drop green ] }
- { [ dup 247 215 - 247 184 - within pick 0 223 within and ] [ 2drop red ] }
- [ 2drop white ]
- } cond ;
-
-: plot-bitmap-bits ( bitmap point byte bit -- )
- #! point is a {x y}.
- [ first2 ] 2dip
- dup swapd -1 * shift 1 bitand 0 =
- [ - 2array ] dip
- [ black ] [ dup get-point-color ] if
- plot-bitmap-pixel ;
-
-: do-bitmap-update ( bitmap value addr -- )
- addr>xy swap
- [ 0 plot-bitmap-bits ] 3keep
- [ 1 plot-bitmap-bits ] 3keep
- [ 2 plot-bitmap-bits ] 3keep
- [ 3 plot-bitmap-bits ] 3keep
- [ 4 plot-bitmap-bits ] 3keep
- [ 5 plot-bitmap-bits ] 3keep
- [ 6 plot-bitmap-bits ] 3keep
- 7 plot-bitmap-bits ;
-
-M: space-invaders update-video ( value addr cpu -- )
- over HEX: 2400 >= [
- space-invaders-bitmap -rot do-bitmap-update
- ] [
- 3drop
- ] if ;
-
-: sync-frame ( millis -- millis )
- #! Sleep until the time for the next frame arrives.
- 1000 60 / >fixnum + millis - dup 0 >
- [ threads:sleep ] [ drop threads:yield ] if millis ;
-
-: invaders-process ( millis gadget -- )
- #! Run a space invaders gadget inside a
- #! concurrent process. Messages can be sent to
- #! signal key presses, etc.
- dup invaders-gadget-quit? [
- 2drop
- ] [
- [ sync-frame ] dip
- [ invaders-gadget-cpu gui-frame ] keep
- [ relayout-1 ] keep
- invaders-process
- ] if ;
-
-M: invaders-gadget graft* ( gadget -- )
- dup invaders-gadget-cpu init-sounds
- f over set-invaders-gadget-quit?
- [ millis swap invaders-process ] curry
- "Space invaders" threads:spawn drop ;
-
-M: invaders-gadget ungraft* ( gadget -- )
- t swap set-invaders-gadget-quit? ;
-
-: (run) ( title cpu rom-info -- )
- over load-rom* <invaders-gadget> swap open-window ;
-
-: run ( -- )
- "Space Invaders" <space-invaders> {
- { HEX: 0000 "invaders/invaders.h" }
- { HEX: 0800 "invaders/invaders.g" }
- { HEX: 1000 "invaders/invaders.f" }
- { HEX: 1800 "invaders/invaders.e" }
- } [ (run) ] with-ui ;
-
-MAIN: run
+++ /dev/null
-Intel 8080-based Space Invaders arcade machine emulator
+++ /dev/null
-demos
-games
-applications
projects / factor.git / commitdiff