mirror of
https://github.com/uffejakobsen/acme.git
synced 2024-12-11 04:50:36 +00:00
131 lines
5.1 KiB
Plaintext
131 lines
5.1 KiB
Plaintext
|
|
||
|
|
65c02 opcode table
|
||
|
|
|
||
|
|
All empty entries are undocumented opcodes.
|
||
|
|
Notice there are still no documented opcodes in the fourth column.
|
||
|
|
All differences to the original 6502 are marked using a '+' sign.
|
||
|
|
|
||
|
|
|
||
|
|
00 brk 01 ora (zp, x) 02 03
|
||
|
|
04+ tsb zp 05 ora zp 06 asl zp 07
|
||
|
|
08 php 09 ora #imm8 0a asl 0b
|
||
|
|
0c+ tsb abs16 0d ora abs16 0e asl abs16 0f
|
||
|
|
10 bpl rel8 11 ora (zp), y 12+ ora (zp) 13
|
||
|
|
14+ trb zp 15 ora zp, x 16 asl zp, x 17
|
||
|
|
18 clc 19 ora abs16, y 1a+ inc 1b
|
||
|
|
1c+ trb abs16 1d ora abs16, x 1e asl abs16, x 1f
|
||
|
|
|
||
|
|
20 jsr abs16 21 and (zp, x) 22 23
|
||
|
|
24 bit zp 25 and zp 26 rol zp 27
|
||
|
|
28 plp 29 and #imm8 2a rol 2b
|
||
|
|
2c bit abs16 2d and abs16 2e rol abs16 2f
|
||
|
|
30 bmi rel8 31 and (zp), y 32+ and (zp) 33
|
||
|
|
34+ bit zp, x 35 and zp, x 36 rol zp, x 37
|
||
|
|
38 sec 39 and abs16, y 3a+ dec 3b
|
||
|
|
3c+ bit abs16, x 3d and abs16, x 3e rol abs16, x 3f
|
||
|
|
|
||
|
|
40 rti 41 eor (zp, x) 42 43
|
||
|
|
44 45 eor zp 46 lsr zp 47
|
||
|
|
48 pha 49 eor #imm8 4a lsr 4b
|
||
|
|
4c jmp abs16 4d eor abs16 4e lsr abs16 4f
|
||
|
|
50 bvc rel8 51 eor (zp), y 52+ eor (zp) 53
|
||
|
|
54 55 eor zp, x 56 lsr zp, x 57
|
||
|
|
58 cli 59 eor abs16, y 5a+ phy 5b
|
||
|
|
5c 5d eor abs16, x 5e lsr abs16, x 5f
|
||
|
|
|
||
|
|
60 rts 61 adc (zp, x) 62 63
|
||
|
|
64+ stz zp 65 adc zp 66 ror zp 67
|
||
|
|
68 pla 69 adc #imm8 6a ror 6b
|
||
|
|
6c jmp (abs16) 6d adc abs16 6e ror abs16 6f
|
||
|
|
70 bvs rel8 71 adc (zp), y 72+ adc (zp) 73
|
||
|
|
74+ stz zp, x 75 adc zp, x 76 ror zp, x 77
|
||
|
|
78 sei 79 adc abs16, y 7a+ ply 7b
|
||
|
|
7c+ jmp (abs16, x) 7d adc abs16, x 7e ror abs16, x 7f
|
||
|
|
|
||
|
|
80+ bra rel8 81 sta (zp, x) 82 83
|
||
|
|
84 sty zp 85 sta zp 86 stx zp 87
|
||
|
|
88 dey 89+ bit #imm8 8a txa 8b
|
||
|
|
8c sty abs16 8d sta abs16 8e stx abs16 8f
|
||
|
|
90 bcc rel8 91 sta (zp), y 92+ sta (zp) 93
|
||
|
|
94 sty zp, x 95 sta zp, x 96 stx zp, y 97
|
||
|
|
98 tya 99 sta abs16, y 9a txs 9b
|
||
|
|
9c+ stz abs16 9d sta abs16, x 9e+ stz abs16, x 9f
|
||
|
|
|
||
|
|
a0 ldy #imm8 a1 lda (zp, x) a2 ldx #imm8 a3
|
||
|
|
a4 ldy zp a5 lda zp a6 ldx zp a7
|
||
|
|
a8 tay a9 lda #imm8 aa tax ab
|
||
|
|
ac ldy abs16 ad lda abs16 ae ldx abs16 af
|
||
|
|
b0 bcs rel8 b1 lda (zp), y b2+ lda (zp) b3
|
||
|
|
b4 ldy zp, x b5 lda zp, x b6 ldx zp, y b7
|
||
|
|
b8 clv b9 lda abs16, y ba tsx bb
|
||
|
|
bc ldy abs16, x bd lda abs16, x be ldx abs16, y bf
|
||
|
|
|
||
|
|
c0 cpy #imm8 c1 cmp (zp, x) c2 c3
|
||
|
|
c4 cpy zp c5 cmp zp c6 dec zp c7
|
||
|
|
c8 iny c9 cmp #imm8 ca dex cb
|
||
|
|
cc cpy abs16 cd cmp abs16 ce dec abs16 cf
|
||
|
|
d0 bne rel8 d1 cmp (zp), y d2+ cmp (zp) d3
|
||
|
|
d4 d5 cmp zp, x d6 dec zp, x d7
|
||
|
|
d8 cld d9 cmp abs16, y da+ phx db
|
||
|
|
dc dd cmp abs16, x de dec abs16, x df
|
||
|
|
|
||
|
|
e0 cpx #imm8 e1 sbc (zp, x) e2 e3
|
||
|
|
e4 cpx zp e5 sbc zp e6 inc zp e7
|
||
|
|
e8 inx e9 sbc #imm8 ea nop eb
|
||
|
|
ec cpx abs16 ed sbc abs16 ee inc abs16 ef
|
||
|
|
f0 beq rel8 f1 sbc (zp), y f2+ sbc (zp) f3
|
||
|
|
f4 f5 sbc zp, x f6 inc zp, x f7
|
||
|
|
f8 sed f9 sbc abs16, y fa+ plx fb
|
||
|
|
fc fd sbc abs16, x fe inc abs16, x ff
|
||
|
|
|
||
|
|
|
||
|
|
#imm8: 8-bit immediate value
|
||
|
|
zp: 8-bit zeropage address
|
||
|
|
abs16: 16-bit absolute address
|
||
|
|
rel8: 8-bit relative address offset
|
||
|
|
|
||
|
|
|
||
|
|
The 65c02 is the CMOS re-design of the 6502. It has a few
|
||
|
|
improvements:
|
||
|
|
|
||
|
|
New mnemonics
|
||
|
|
-------------
|
||
|
|
test and (re-)set bits against accumulator:
|
||
|
|
04 tsb zp
|
||
|
|
0c tsb abs16
|
||
|
|
14 trb zp
|
||
|
|
1c trb abs16
|
||
|
|
push/pull x/y:
|
||
|
|
5a phy
|
||
|
|
7a ply
|
||
|
|
da phx
|
||
|
|
fa plx
|
||
|
|
store zero:
|
||
|
|
64 stz zp
|
||
|
|
74 stz zp, x
|
||
|
|
9c stz abs16
|
||
|
|
9e stz abs16, x
|
||
|
|
branch always:
|
||
|
|
80 bra rel8
|
||
|
|
|
||
|
|
New addressing modes for existing mnemonics
|
||
|
|
-------------------------------------------
|
||
|
|
zp indirect addressing without indexing:
|
||
|
|
12 ora (zp)
|
||
|
|
32 and (zp)
|
||
|
|
52 eor (zp)
|
||
|
|
72 adc (zp)
|
||
|
|
92 sta (zp)
|
||
|
|
b2 lda (zp)
|
||
|
|
d2 cmp (zp)
|
||
|
|
f2 sbc (zp)
|
||
|
|
implied ("accumulator") addressing:
|
||
|
|
1a inc
|
||
|
|
3a dec
|
||
|
|
x-indexed indirect addressing:
|
||
|
|
7c jmp (abs16, x)
|
||
|
|
three more addressing modes for BIT:
|
||
|
|
34 bit zp, x
|
||
|
|
3c bit abs16, x
|
||
|
|
89 bit #imm8
|