+++ /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
-! Copyright (C) 2006 Chris Double.
-! See http://factorcode.org/license.txt for BSD license.
-!
-USING: accessors kernel math sequences words arrays io io.files
-math.parser assocs quotations parser lexer
-peg peg.ebnf peg.parsers tools.time io.encodings.binary sequences.deep
-symbols combinators fry namespaces ;
-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 ;
-
-: carry-flag HEX: 01 ; inline
-: parity-flag HEX: 04 ; inline
-: half-carry-flag HEX: 10 ; inline
-: interrupt-flag HEX: 20 ; inline
-: zero-flag HEX: 40 ; inline
-: sign-flag HEX: 80 ; inline
-
-: >word< ( word -- byte byte )
- #! Explode a word into its two 8 bit values.
- dup HEX: FF bitand swap -8 shift HEX: FF bitand swap ;
-
-: cpu-af ( cpu -- word )
- #! Return the 16-bit pseudo register AF.
- [ cpu-a 8 shift ] keep cpu-f bitor ;
-
-: set-cpu-af ( value cpu -- )
- #! Set the value of the 16-bit pseudo register AF
- >r >word< r> tuck set-cpu-f set-cpu-a ;
-
-: cpu-bc ( cpu -- word )
- #! Return the 16-bit pseudo register BC.
- [ cpu-b 8 shift ] keep cpu-c bitor ;
-
-: set-cpu-bc ( value cpu -- )
- #! Set the value of the 16-bit pseudo register BC
- >r >word< r> tuck set-cpu-c set-cpu-b ;
-
-: cpu-de ( cpu -- word )
- #! Return the 16-bit pseudo register DE.
- [ cpu-d 8 shift ] keep cpu-e bitor ;
-
-: set-cpu-de ( value cpu -- )
- #! Set the value of the 16-bit pseudo register DE
- >r >word< r> tuck set-cpu-e set-cpu-d ;
-
-: cpu-hl ( cpu -- word )
- #! Return the 16-bit pseudo register HL.
- [ cpu-h 8 shift ] keep cpu-l bitor ;
-
-: set-cpu-hl ( value cpu -- )
- #! Set the value of the 16-bit pseudo register HL
- >r >word< r> tuck set-cpu-l set-cpu-h ;
-
-: flag-set? ( flag cpu -- bool )
- cpu-f bitand 0 = not ;
-
-: flag-clear? ( flag cpu -- bool )
- cpu-f bitand 0 = ;
-
-: flag-nz? ( cpu -- bool )
- #! Test flag status
- cpu-f zero-flag bitand 0 = ;
-
-: flag-z? ( cpu -- bool )
- #! Test flag status
- cpu-f zero-flag bitand 0 = not ;
-
-: flag-nc? ( cpu -- bool )
- #! Test flag status
- cpu-f carry-flag bitand 0 = ;
-
-: flag-c? ( cpu -- bool )
- #! Test flag status
- cpu-f carry-flag bitand 0 = not ;
-
-: flag-po? ( cpu -- bool )
- #! Test flag status
- cpu-f parity-flag bitand 0 = ;
-
-: flag-pe? ( cpu -- bool )
- #! Test flag status
- cpu-f parity-flag bitand 0 = not ;
-
-: flag-p? ( cpu -- bool )
- #! Test flag status
- cpu-f sign-flag bitand 0 = ;
-
-: flag-m? ( cpu -- bool )
- #! Test flag status
- cpu-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 <= [
- cpu-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 >r 1 + r> read-byte 8 shift bitor ;
-
-: next-byte ( cpu -- byte )
- #! Return the value of the byte at PC, and increment PC.
- [ cpu-pc ] keep
- [ read-byte ] keep
- [ cpu-pc 1 + ] keep
- set-cpu-pc ;
-
-: next-word ( cpu -- word )
- #! Return the value of the word at PC, and increment PC.
- [ cpu-pc ] keep
- [ read-word ] keep
- [ cpu-pc 2 + ] keep
- set-cpu-pc ;
-
-
-: write-byte ( value addr cpu -- )
- #! Write a byte to the specified memory address.
- over dup HEX: 2000 < swap HEX: FFFF > or [
- 3drop
- ] [
- 3dup cpu-ram set-nth
- update-video
- ] if ;
-
-
-: write-word ( value addr cpu -- )
- #! Write a 16-bit word to the specified memory address.
- >r >r >word< r> r> [ write-byte ] 2keep >r 1 + r> write-byte ;
-
-: cpu-a-bitand ( quot cpu -- )
- #! A &= quot call
- [ cpu-a swap call bitand ] keep set-cpu-a ; inline
-
-: cpu-a-bitor ( quot cpu -- )
- #! A |= quot call
- [ cpu-a swap call bitor ] keep set-cpu-a ; inline
-
-: cpu-a-bitxor ( quot cpu -- )
- #! A ^= quot call
- [ cpu-a swap call bitxor ] keep set-cpu-a ; inline
-
-: cpu-a-bitxor= ( value cpu -- )
- #! cpu-a ^= value
- [ cpu-a bitxor ] keep set-cpu-a ;
-
-: cpu-f-bitand ( quot cpu -- )
- #! F &= quot call
- [ cpu-f swap call bitand ] keep set-cpu-f ; inline
-
-: cpu-f-bitor ( quot cpu -- )
- #! F |= quot call
- [ cpu-f swap call bitor ] keep set-cpu-f ; inline
-
-: cpu-f-bitxor ( quot cpu -- )
- #! F |= quot call
- [ cpu-f swap call bitxor ] keep set-cpu-f ; inline
-
-: cpu-f-bitor= ( value cpu -- )
- #! cpu-f |= value
- [ cpu-f bitor ] keep set-cpu-f ;
-
-: cpu-f-bitand= ( value cpu -- )
- #! cpu-f &= value
- [ cpu-f bitand ] keep set-cpu-f ;
-
-: cpu-f-bitxor= ( value cpu -- )
- #! cpu-f ^= value
- [ cpu-f bitxor ] keep set-cpu-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.
- >r bitxor bitxor HEX: 10 bitand 0 = not r>
- 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
- >r 2dup + r> ! lhs rhs result cpu
- [ 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 + >r 1 + r> ] when ;
-
-: add-byte-with-carry ( lhs rhs cpu -- result )
- #! Add rhs to lhs plus carry.
- >r 2dup + r> ! lhs rhs result cpu
- [ 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 - >r 1 - r> ] when ;
-
-: sub-byte ( lhs rhs cpu -- result )
- #! Subtract rhs from lhs
- >r 2dup - r>
- [ 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
- >r 2dup - r>
- [ 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.
- >r 1 2dup + r> ! lhs rhs result cpu
- [ 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.
- >r 1 2dup - r> ! lhs rhs result cpu
- [ 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.
- >r + r> 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 >r
- BIN: 00001000 bitand -3 shift r>
- 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
- >r bitand r> [ 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.
- >r bitxor r> [ 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.
- >r bitor r> [ update-flags ] 2keep
- [ half-carry-flag carry-flag bitor clear-flag ] keep
- drop HEX: FF bitand ;
-
-: flags ( seq -- seq )
- [ 0 [ execute bitor ] reduce ] map ;
-
-: decrement-sp ( n cpu -- )
- #! Decrement the stackpointer by n.
- [ cpu-sp ] keep
- >r swap - r> set-cpu-sp ;
-
-: save-pc ( cpu -- )
- #! Save the value of the PC on the stack.
- [ cpu-pc ] keep ! pc cpu
- [ 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.
- [ cpu-sp ] keep
- [ read-word ] keep
- -2 swap decrement-sp ;
-
-: push-sp ( value cpu -- )
- [ 2 swap decrement-sp ] keep
- [ cpu-sp ] keep
- write-word ;
-
-: pop-sp ( cpu -- value )
- [ cpu-sp ] keep
- [ read-word ] keep
- -2 swap decrement-sp ;
-
-: call-sub ( addr cpu -- )
- #! Call the address as a subroutine.
- dup push-pc
- >r HEX: FFFF bitand r> set-cpu-pc ;
-
-: ret-from-sub ( cpu -- )
- [ pop-pc ] keep set-cpu-pc ;
-
-: interrupt ( number cpu -- )
- #! Perform a hardware interrupt
-! "***Interrupt: " write over 16 >base print
- dup cpu-f interrupt-flag bitand 0 = not [
- dup push-pc
- set-cpu-pc
- ] [
- 2drop
- ] if ;
-
-: inc-cycles ( n cpu -- )
- #! Increment the number of cpu cycles
- [ cpu-cycles + ] keep set-cpu-cycles ;
-
-: instruction-cycles ( -- vector )
- #! Return a 256 element vector containing the cycles for
- #! each opcode in the 8080 instruction set.
- << 256 f <array> parsed >> ;
-
-: not-implemented ( <cpu> -- )
- drop ;
-
-: instructions ( -- vector )
- #! Return a 256 element vector containing the emulation words for
- #! each opcode in the 8080 instruction set.
- << 256 [ [ not-implemented ] 2array ] map parsed >> ; inline
-
-: set-instruction ( quot n -- )
- tuck >r 2array r> instructions set-nth ;
-
-M: cpu reset ( cpu -- )
- #! Reset the CPU to its poweron state
- [ 0 swap set-cpu-b ] keep
- [ 0 swap set-cpu-c ] keep
- [ 0 swap set-cpu-d ] keep
- [ 0 swap set-cpu-e ] keep
- [ 0 swap set-cpu-h ] keep
- [ 0 swap set-cpu-l ] keep
- [ 0 swap set-cpu-a ] keep
- [ 0 swap set-cpu-f ] keep
- [ 0 swap set-cpu-pc ] keep
- [ HEX: F000 swap set-cpu-sp ] keep
- [ HEX: FFFF 0 <array> swap set-cpu-ram ] keep
- [ f swap set-cpu-halted? ] keep
- [ HEX: 10 swap set-cpu-last-interrupt ] keep
- 0 swap set-cpu-cycles ;
-
-: <cpu> ( -- cpu ) cpu new dup reset ;
-
-: (load-rom) ( n ram -- )
- read1 [ ! n ram ch
- -rot [ set-nth ] 2keep >r 1 + r> (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).
- cpu-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 [
- cpu-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.
- [ cpu-pc ] keep ! pc cpu
- [ over 1 + swap set-cpu-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
- [ cpu-cycles ] keep
- over 16667 < [
- 2drop
- ] [
- [ >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 ;
-
-: peek-instruction ( cpu -- word )
- #! Return the next instruction from the cpu's program
- #! counter, but don't increment the counter.
- [ cpu-pc ] keep read-byte instructions nth first ;
-
-: cpu. ( cpu -- )
- [ " PC: " write cpu-pc 16 >base 4 CHAR: \s pad-left write ] keep
- [ " B: " write cpu-b 16 >base 2 CHAR: \s pad-left write ] keep
- [ " C: " write cpu-c 16 >base 2 CHAR: \s pad-left write ] keep
- [ " D: " write cpu-d 16 >base 2 CHAR: \s pad-left write ] keep
- [ " E: " write cpu-e 16 >base 2 CHAR: \s pad-left write ] keep
- [ " F: " write cpu-f 16 >base 2 CHAR: \s pad-left write ] keep
- [ " H: " write cpu-h 16 >base 2 CHAR: \s pad-left write ] keep
- [ " L: " write cpu-l 16 >base 2 CHAR: \s pad-left write ] keep
- [ " A: " write cpu-a 16 >base 2 CHAR: \s pad-left write ] keep
- [ " SP: " write cpu-sp 16 >base 4 CHAR: \s pad-left write ] keep
- [ " cycles: " write cpu-cycles number>string 5 CHAR: \s pad-left write ] keep
- [ " " write peek-instruction name>> write " " write ] keep
- nl drop ;
-
-: cpu*. ( cpu -- )
- [ " PC: " write cpu-pc 16 >base 4 CHAR: \s pad-left write ] keep
- [ " B: " write cpu-b 16 >base 2 CHAR: \s pad-left write ] keep
- [ " C: " write cpu-c 16 >base 2 CHAR: \s pad-left write ] keep
- [ " D: " write cpu-d 16 >base 2 CHAR: \s pad-left write ] keep
- [ " E: " write cpu-e 16 >base 2 CHAR: \s pad-left write ] keep
- [ " F: " write cpu-f 16 >base 2 CHAR: \s pad-left write ] keep
- [ " H: " write cpu-h 16 >base 2 CHAR: \s pad-left write ] keep
- [ " L: " write cpu-l 16 >base 2 CHAR: \s pad-left write ] keep
- [ " A: " write cpu-a 16 >base 2 CHAR: \s pad-left write ] keep
- [ " SP: " write cpu-sp 16 >base 4 CHAR: \s pad-left write ] keep
- [ " cycles: " write cpu-cycles number>string 5 CHAR: \s pad-left 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" { cpu-a set-cpu-a } }
- { "B" { cpu-b set-cpu-b } }
- { "C" { cpu-c set-cpu-c } }
- { "D" { cpu-d set-cpu-d } }
- { "E" { cpu-e set-cpu-e } }
- { "H" { cpu-h set-cpu-h } }
- { "L" { cpu-l set-cpu-l } }
- { "AF" { cpu-af set-cpu-af } }
- { "BC" { cpu-bc set-cpu-bc } }
- { "DE" { cpu-de set-cpu-de } }
- { "HL" { cpu-hl set-cpu-hl } }
- { "SP" { cpu-sp set-cpu-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
- [ cpu-sp 2 - dup ] keep ! sp sp cpu
- [ set-cpu-sp ] keep ! sp cpu
- [ cpu-pc ] keep ! sp pc cpu
- swapd [ write-word ] keep ! cpu
- >r 8 * r> set-cpu-pc ;
-
-: (emulate-CALL) ( cpu -- )
- #! 205 - CALL nn
- [ next-word HEX: FFFF bitand ] keep ! addr cpu
- [ cpu-sp 2 - dup ] keep ! addr sp sp cpu
- [ set-cpu-sp ] keep ! addr sp cpu
- [ cpu-pc ] keep ! addr sp pc cpu
- swapd [ write-word ] keep ! addr cpu
- set-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.
- [ cpu-a -7 shift ] keep
- over 0 = [ dup carry-flag clear-flag ] [ dup carry-flag set-flag ] if
- [ cpu-a 1 shift HEX: FF bitand ] keep
- >r bitor r> set-cpu-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.
- [ cpu-a 1 bitand 7 shift ] keep
- over 0 = [ dup carry-flag clear-flag ] [ dup carry-flag set-flag ] if
- [ cpu-a 254 bitand -1 shift ] keep
- >r bitor r> set-cpu-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
- [ cpu-a 127 bitand 7 shift ] keep
- dup cpu-a 128 bitand 0 = [ dup carry-flag clear-flag ] [ dup carry-flag set-flag ] if
- >r bitor r> set-cpu-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
- [ cpu-a 254 bitand -1 shift ] keep
- dup cpu-a 1 bitand 0 = [ dup carry-flag clear-flag ] [ dup carry-flag set-flag ] if
- >r bitor r> set-cpu-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
- cpu-a BIN: 1111 bitand 9 > or [ 6 ] [ 0 ] if
- ] keep
- [ cpu-a + ] keep
- [ update-flags ] 2keep
- [ swap HEX: FF bitand swap set-cpu-a ] keep
- [
- dup carry-flag swap flag-set? swap
- cpu-a -4 shift BIN: 1111 bitand 9 > or [ 96 ] [ 0 ] if
- ] keep
- [ cpu-a + ] keep
- [ update-flags ] 2keep
- swap HEX: FF bitand swap set-cpu-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" [ [ cpu-a ] keep [ next-byte ] keep sub-byte drop ] }
- { "CP-R" [ [ cpu-a ] keep [ $1 ] keep sub-byte drop ] }
- { "CP-(RR)" [ [ cpu-a ] keep [ $1 ] keep [ read-byte ] keep sub-byte drop ] }
- { "OR-N" [ [ cpu-a ] keep [ next-byte ] keep [ or-byte ] keep set-cpu-a ] }
- { "OR-R" [ [ cpu-a ] keep [ $1 ] keep [ or-byte ] keep set-cpu-a ] }
- { "OR-(RR)" [ [ cpu-a ] keep [ $1 ] keep [ read-byte ] keep [ or-byte ] keep set-cpu-a ] }
- { "XOR-N" [ [ cpu-a ] keep [ next-byte ] keep [ xor-byte ] keep set-cpu-a ] }
- { "XOR-R" [ [ cpu-a ] keep [ $1 ] keep [ xor-byte ] keep set-cpu-a ] }
- { "XOR-(RR)" [ [ cpu-a ] keep [ $1 ] keep [ read-byte ] keep [ xor-byte ] keep set-cpu-a ] }
- { "AND-N" [ [ cpu-a ] keep [ next-byte ] keep [ and-byte ] keep set-cpu-a ] }
- { "AND-R" [ [ cpu-a ] keep [ $1 ] keep [ and-byte ] keep set-cpu-a ] }
- { "AND-(RR)" [ [ cpu-a ] keep [ $1 ] keep [ read-byte ] keep [ and-byte ] keep set-cpu-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" [ [ cpu-a ] keep [ $1 ] keep [ sub-byte ] keep set-cpu-a ] }
- { "SUB-(RR)" [ [ cpu-a ] keep [ $1 ] keep [ read-byte ] keep [ sub-byte ] keep set-cpu-a ] }
- { "SUB-N" [ [ cpu-a ] keep [ next-byte ] keep [ sub-byte ] keep set-cpu-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" [ [ cpu-pc ] keep [ read-word ] keep set-cpu-pc ] }
- { "JP-F|FF,NN" [ [ $1 ] keep swap [ [ next-word ] keep [ set-cpu-pc ] keep [ cpu-cycles ] keep swap 5 + swap set-cpu-cycles ] [ [ cpu-pc 2 + ] keep set-cpu-pc ] if ] }
- { "JP-(RR)" [ [ $1 ] keep set-cpu-pc ] }
- { "CALL-NN" [ (emulate-CALL) ] }
- { "CALL-F|FF,NN" [ [ $1 ] keep swap [ 7 over inc-cycles (emulate-CALL) ] [ [ cpu-pc 2 + ] keep set-cpu-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 set-cpu-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 ] 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 -- emulate-quot )
- #! 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
- >r "_" join [ "emulate-" % % ] "" make create-in dup last-instruction global set-at
- r> (( cpu -- )) define-declared ;
-
-: INSTRUCTION: ";" parse-tokens parse-instructions ; parsing
-
-: cycles ( -- )
- #! Set the number of cycles for the last instruction that was defined.
- scan string>number last-opcode global at instruction-cycles set-nth ; parsing
-
-: 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 ; parsing
-
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