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3db33bafb5
git-svn-id: https://svn.code.sf.net/p/acme-crossass/code-0/trunk@286 4df02467-bbd4-4a76-a152-e7ce94205b78
87 lines
5.1 KiB
Plaintext
87 lines
5.1 KiB
Plaintext
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nmos6502 opcode table
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This table includes all of the unintended ("illegal") opcodes. These are
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marked using '+' or '!' signs:
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'+' means the instruction is supported by ACME,
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'!' means ACME will use a different (but functionally equivalent) opcode.
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00 brk 01 ora (zp, x) 02+ jam 03+ slo (zp, x)
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04+ nop zp 05 ora zp 06 asl zp 07+ slo zp
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08 php 09 ora #imm8 0a asl 0b+ anc #imm8
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0c+ nop abs16 0d ora abs16 0e asl abs16 0f+ slo abs16
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10 bpl rel8 11 ora (zp), y 12! jam 13+ slo (zp), y
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14+ nop zp, x 15 ora zp, x 16 asl zp, x 17+ slo zp, x
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18 clc 19 ora abs16, y 1a! nop 1b+ slo abs16, y
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1c+ nop abs16, x 1d ora abs16, x 1e asl abs16, x 1f+ slo abs16, x
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20 jsr abs16 21 and (zp, x) 22! jam 23+ rla (zp, x)
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24 bit zp 25 and zp 26 rol zp 27+ rla zp
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28 plp 29 and #imm8 2a rol 2b! anc #imm8
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2c bit abs16 2d and abs16 2e rol abs16 2f+ rla abs16
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30 bmi rel8 31 and (zp), y 32! jam 33+ rla (zp), y
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34! nop zp, x 35 and zp, x 36 rol zp, x 37+ rla zp, x
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38 sec 39 and abs16, y 3a! nop 3b+ rla abs16, y
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3c! nop abs16, x 3d and abs16, x 3e rol abs16, x 3f+ rla abs16, x
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40 rti 41 eor (zp, x) 42! jam 43+ sre (zp, x)
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44! nop zp 45 eor zp 46 lsr zp 47+ sre zp
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48 pha 49 eor #imm8 4a lsr 4b+ alr #imm8
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4c jmp abs16 4d eor abs16 4e lsr abs16 4f+ sre abs16
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50 bvc rel8 51 eor (zp), y 52! jam 53+ sre (zp), y
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54! nop zp, x 55 eor zp, x 56 lsr zp, x 57+ sre zp, x
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58 cli 59 eor abs16, y 5a! nop 5b+ sre abs16, y
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5c! nop abs16, x 5d eor abs16, x 5e lsr abs16, x 5f+ sre abs16, x
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60 rts 61 adc (zp, x) 62! jam 63+ rra (zp, x)
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64! nop zp 65 adc zp 66 ror zp 67+ rra zp
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68 pla 69 adc #imm8 6a ror 6b+ arr #imm8
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6c jmp (abs16) 6d adc abs16 6e ror abs16 6f+ rra abs16
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70 bvs rel8 71 adc (zp), y 72! jam 73+ rra (zp), y
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74! nop zp, x 75 adc zp, x 76 ror zp, x 77+ rra zp, x
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78 sei 79 adc abs16, y 7a! nop 7b+ rra abs16, y
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7c! nop abs16, x 7d adc abs16, x 7e ror abs16, x 7f+ rra abs16, x
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80+ nop #imm8 81 sta (zp, x) 82! nop #imm8 83+ sax (zp, x)
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84 sty zp 85 sta zp 86 stx zp 87+ sax zp
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88 dey 89! nop #imm8 8a txa 8b+ ane #imm8
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8c sty abs16 8d sta abs16 8e stx abs16 8f+ sax abs16
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90 bcc rel8 91 sta (zp), y 92! jam 93+ sha (zp), y
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94 sty zp, x 95 sta zp, x 96 stx zp, y 97+ sax zp, y
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98 tya 99 sta abs16, y 9a txs 9b+ tas abs16, y
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9c+ shy abs16, x 9d sta abs16, x 9e+ shx abs16, y 9f+ sha abs16, y
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a0 ldy #imm8 a1 lda (zp, x) a2 ldx #imm8 a3+ lax (zp, x)
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a4 ldy zp a5 lda zp a6 ldx zp a7+ lax zp
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a8 tay a9 lda #imm8 aa tax ab+ lxa #imm8
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ac ldy abs16 ad lda abs16 ae ldx abs16 af+ lax abs16
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b0 bcs rel8 b1 lda (zp), y b2! jam b3+ lax (zp), y
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b4 ldy zp, x b5 lda zp, x b6 ldx zp, y b7+ lax zp, y
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b8 clv b9 lda abs16, y ba tsx bb+ las abs16, y
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bc ldy abs16, x bd lda abs16, x be ldx abs16, y bf+ lax abs16, y
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c0 cpy #imm8 c1 cmp (zp, x) c2! nop #imm8 c3+ dcp (zp, x)
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c4 cpy zp c5 cmp zp c6 dec zp c7+ dcp zp
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c8 iny c9 cmp #imm8 ca dex cb+ sbx #imm8
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cc cpy abs16 cd cmp abs16 ce dec abs16 cf+ dcp abs16
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d0 bne rel8 d1 cmp (zp), y d2! jam d3+ dcp (zp), y
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d4! nop zp, x d5 cmp zp, x d6 dec zp, x d7+ dcp zp, x
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d8 cld d9 cmp abs16, y da! nop db+ dcp abs16, y
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dc! nop abs16, x dd cmp abs16, x de dec abs16, x df+ dcp abs16, x
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e0 cpx #imm8 e1 sbc (zp, x) e2! nop #imm8 e3+ isc (zp, x)
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e4 cpx zp e5 sbc zp e6 inc zp e7+ isc zp
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e8 inx e9 sbc #imm8 ea nop eb! sbc #imm8
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ec cpx abs16 ed sbc abs16 ee inc abs16 ef+ isc abs16
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f0 beq rel8 f1 sbc (zp), y f2! jam f3+ isc (zp), y
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f4! nop zp, x f5 sbc zp, x f6 inc zp, x f7+ isc zp, x
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f8 sed f9 sbc abs16, y fa! nop fb+ isc abs16, y
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fc! nop abs16, x fd sbc abs16, x fe inc abs16, x ff+ isc abs16, x
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#imm8: 8-bit immediate value
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zp: 8-bit zeropage address
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abs16: 16-bit absolute address
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rel8: 8-bit relative address offset
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