mirror of
https://github.com/uffejakobsen/acme.git
synced 2024-06-01 13:41:29 +00:00
70b9ee222d
git-svn-id: https://svn.code.sf.net/p/acme-crossass/code-0/trunk@273 4df02467-bbd4-4a76-a152-e7ce94205b78
119 lines
5.9 KiB
Plaintext
119 lines
5.9 KiB
Plaintext
|
|
m65 opcode table(s)
|
|
|
|
The m65 instruction set extends the 4502 instruction set using prefix bytes.
|
|
Therefore, the "normal" opcode table is the same as for the 4502 cpu (see that
|
|
file), so this file only contains information about the extensions.
|
|
|
|
|
|
"quad mode" allows 32-bit data operations using a virtual register called 'Q'.
|
|
The mnemonics aslq/lsrq/rolq/rorq/inq/deq have five addressing modes.
|
|
The mnemonics ldq/stq have nine addressing modes in quad mode, and a tenth
|
|
when combined with long mode.
|
|
The mnemonics cpq/adcq/sbcq/andq/eorq/orq have eight addressing modes in quad
|
|
mode, and a ninth when combined with long mode.
|
|
This mode is entered after a NEG:NEG (42 42) prefix, the following opcode is
|
|
then taken from this table:
|
|
|
|
00 01 orq (zp, x) 02 03
|
|
04 05 orq zp 06 aslq zp 07
|
|
08 09 0a aslq 0b
|
|
0c 0d orq abs16 0e aslq abs16 0f
|
|
10 11 orq (zp), y 12 orq (zp) 13
|
|
14 15 orq zp, x 16 aslq zp, x 17
|
|
18 19 orq abs16, y 1a inq 1b
|
|
1c 1d orq abs16, x 1e aslq abs16, x 1f
|
|
|
|
20 21 andq (zp, x) 22 23
|
|
24 25 andq zp 26 rolq zp 27
|
|
28 29 2a rolq 2b
|
|
2c 2d andq abs16 2e rolq abs16 2f
|
|
30 31 andq (zp), y 32 andq (zp) 33
|
|
34 35 andq zp, x 36 rolq zp, x 37
|
|
38 39 andq abs16, y 3a deq 3b
|
|
3c 3d andq abs16, x 3e rolq abs16, x 3f
|
|
|
|
40 41 eorq (zp, x) 42 43
|
|
44 45 eorq zp 46 lsrq zp 47
|
|
48 49 4a lsrq 4b
|
|
4c 4d eorq abs16 4e lsrq abs16 4f
|
|
50 51 eorq (zp), y 52 eorq (zp) 53
|
|
54 55 eorq zp, x 56 lsrq zp, x 57
|
|
58 59 eorq abs16, y 5a 5b
|
|
5c 5d eorq abs16, x 5e lsrq abs16, x 5f
|
|
|
|
60 61 adcq (zp, x) 62 63
|
|
64 65 adcq zp 66 rorq zp 67
|
|
68 69 6a rorq 6b
|
|
6c 6d adcq abs16 6e rorq abs16 6f
|
|
70 71 adcq (zp), y 72 adcq (zp) 73
|
|
74 75 adcq zp, x 76 rorq zp, x 77
|
|
78 79 adcq abs16, y 7a 7b
|
|
7c 7d adcq abs16, x 7e rorq abs16, x 7f
|
|
|
|
80 81 stq (zp, x) 82 stq (zp, s), y 83
|
|
84 85 stq zp 86 87
|
|
88 89 8a 8b
|
|
8c 8d stq abs16 8e 8f
|
|
90 91 stq (zp), y 92 stq (zp) 93
|
|
94 95 stq zp, x 96 97
|
|
98 99 stq abs16, y 9a 9b
|
|
9c 9d stq abs16, x 9e 9f
|
|
|
|
a0 a1 ldq (zp, x) a2 a3
|
|
a4 a5 ldq zp a6 a7
|
|
a8 a9 aa ab
|
|
ac ad ldq abs16 ae af
|
|
b0 b1 ldq (zp), y b2 ldq (zp) b3
|
|
b4 b5 ldq zp, x b6 b7
|
|
b8 b9 ldq abs16, y ba bb
|
|
bc bd ldq abs16, x be bf
|
|
|
|
c0 c1 cpq (zp, x) c2 c3
|
|
c4 c5 cpq zp c6 deq zp c7
|
|
c8 c9 ca cb
|
|
cc cd cpq abs16 ce deq abs16 cf
|
|
d0 d1 cpq (zp), y d2 cpq (zp) d3
|
|
d4 d5 cpq zp, x d6 deq zp, x d7
|
|
d8 d9 cpq abs16, y da db
|
|
dc dd cpq abs16, x de deq abs16, x df
|
|
|
|
e0 e1 sbcq (zp, x) e2 ldq (zp, s), y e3
|
|
e4 e5 sbcq zp e6 inq zp e7
|
|
e8 e9 ea eb
|
|
ec ed sbcq abs16 ee inq abs16 ef
|
|
f0 f1 sbcq (zp), y f2 sbcq (zp) f3
|
|
f4 f5 sbcq zp, x f6 inq zp, x f7
|
|
f8 f9 sbcq abs16, y fa fb
|
|
fc fd sbcq abs16, x fe inq abs16, x ff
|
|
|
|
zp: 8-bit zeropage address
|
|
abs16: 16-bit absolute address
|
|
|
|
|
|
"long mode" adds an addressing mode using 32-bit pointers for eight existing
|
|
mnemonics. This mode is entered after a NOP (ea) prefix, the following opcode
|
|
should then be one of these:
|
|
|
|
12 ora [zp], z 32 and [zp], z 52 eor [zp], z 72 adc [zp], z
|
|
92 sta [zp], z b2 lda [zp], z d2 cmp [zp], z f2 sbc [zp], z
|
|
|
|
|
|
"quad" and "long" modes can be combined to have 32-bit data access using a
|
|
32-bit pointer. This adds another addressing mode for eight of the new
|
|
mnemonics. This mode is entered after a NEG:NEG:NOP (42 42 ea) prefix, the
|
|
following opcode should then be one of these:
|
|
|
|
12 orq [zp] 32 andq [zp] 52 eorq [zp] 72 adcq [zp]
|
|
92 stq [zp] b2 ldq [zp] d2 cpq [zp] f2 sbcq [zp]
|
|
|
|
|
|
Because the addressing modes are changed a bit by the prefix codes, here are
|
|
some of the unsupported combinations just for comparison (these result in
|
|
"Illegal combination of command and addressing mode"):
|
|
lda (zp) ; 65c02 knew this, but 65ce02 added z index!
|
|
lda [zp] ; long mode also expects z index!
|
|
ldq #imm ; quad mode has no immediate addressing!
|
|
ldq (zp), z ; quad mode does not use z index!
|
|
ldq [zp], z ; quad and long modes combined do not use z index!
|