c65 OpCodes, Draft1
=====================================================}94/02/06/04:43p{====

This text file brought to you courtesy of TPUG via CRSo.

	by Jim Butterfield and myself, }>ug Rodger.

Additions From: Simon Laule (c900cade@w255zrz.zrz.tu-berlin.de)
	5 Feb 1994 13:17:58 GMT

System:
     c65 v0.9.910111 CBDOS v1.0, 1084 RGBa {roundy} and 1581 {device 10}.

FileName Text	      . Binary		TPUG Disk:
	   c65.opz1,s : c65dump,p		c65.1

Purpose:
     define all the csg65ce02 OpCodez. 
      -rough draft so far..

====} Ledgend {===========================================================

 ++   -LONG Branches! 2 byte operand and Relative Adressing!
 ??   -Unclear as yet, possibly hardwired to another chip.
 **   -Unclear, within in easy reach though.
 !!   -Surprisingly useful bonus!
 word -Seem to be 2_byte/word related.

  ..after working through these so long the OpCodez relating to Z register
are starting to look normal! BTW; I originaly suspected no ZeroPage
adressing for Z Register ..{honk!}  I wuz quite wrong, there are a few.
{stz zp : stz zp,x : cpz zp}  No ldz zp!!
								   }>ug..
====} OpCodez {===========================================================

				BYTES
00	 brk
01 00	 ora ($00,x)
02	 cle		 ??		Clear Emulation ???
03	 see		 ??		Set Emulation ???
04 00	 tsb  $00	 **
05 00	 ora  $00
06 00	 asl  $00
07 00	 rmb0 $00	 **
08	 php
09 00	 ora  #00
0a	 asl
0b	 tsy
0c 01 00 tsb  $0001	 **
0d 01 00 ora  $0001
0e 01 00 asl  $0001
0f 01 00 bbr0 $01,$310e  **		branch on bit reset (0.bit) bbr0-bbr7
					 ( also bbs0-7: branch on bit set)
10 00	 bpl  $3020
11 00	 ora  ($00),y
12 00	 ora  ($00),z
13 00 00 bpl  $3008	 ++	3	(just like 65c02)
14 00	 trb  $00	 ??
15 00	 ora  $00,x
16 00	 asl  $00,x
17 0a	 rmb1 $0a	 **
18	 clc
19 01 00 ora  $0001,y
1a	 inc
1b	 inz				Increment Z-Register
1c 01 00 trb  $0001	 ??
1d 01 00 ora  $0001,x
1e 01 00 asl  $0001,x
1f 01 00 bbr1 $01,$3020  **

20 01 00 jsr  $0001
21 00	 and  ($00,x)
22 01 00 jsr  ($0001)			new: JSR x-indiziert
23 01 00 jsr  ($0001,x)  !!
24 00	 bit  $00
25 00	 and  $00
26 00	 rol  $00
27 00	 rmb2 $00	 **		Reset bit 2, ZP
28	 plp
29 00	 and  #$00
2a	 rol
2b	 tys
2c 00 00 bit  $0000
2d 00 00 and  $0000
2e 00 00 rol  $0000
2f 00 00 bbr2 $00,$3047  **

30 00	 bmi  $3049
31 00	 and  ($00),y
32 00	 and  ($00),z
33 01 00 bmi  $3050	 ++
34 00	 bit  $00,x
35 00	 and  $00,x
36 00	 rol  $00,x
37 00	 rmb3 $00	 **
38	 sec
39 01 00 and  $0001,y
3a	 dec  a
3b	 dez
3c 01 00 bit  $0001,x
3d 01 00 and  $0001,x
3e 01 00 rol  $0001,x
3f 01 00 bbr3 $01,$306a **

40	 rti
41 00	 eor  ($00,x)
42	 neg		 ??		negate akku???
43	 asr  a
44 00	 asr  $00
45 00	 eor  $00
46 00	 lsr  $00
47 00	 rmb4 $00	 **
48	 pha
49 00	 eor  #$00
4a	 lsr  a
4b	 taz				transfer akku -> z-register
4c 01 00 jmp  $0001
4d 01 00 eor  $0001
4e 01 00 lsr  $0001
4f 01 00 bbr4 $01,$3088  **

50 00	 bvc  $308a
51 00	 eor  ($00),y
52 00	 eor  ($00),z
53 01 00 bvc  $3091	 ++
54 00	 asr  $00,x
55 00	 eor  $00,x
56 00	 lsr  $00,x
57 00	 rmb5 $00	 **
58	 cli
59 01 00 eor  $0001,y
5a	 phy
5b	 tab		 !!!
5c	 map		 !!!
5d 01 00 eor  $0001,x
5e 01 00 lsr  $0001,x
5f 01 00 bbr5 $01,$30a9  **

60	 rts
61 00	 adc  ($00,x)
62 00	 rts  #$00
63 01 00 bsr  $30b1	 ++
64 00	 stz  $00
65 00	 adc  $00
66 00	 ror  $00
67 00	 rmb6 $00	 **
68	 pla
69 00	 adc  #$00
6a	 ror
6b	 tza				transfer z-reg -> akku
6c 01 00 jmp  ($0001)
6d 01 00 adc  $0001
6e 01 00 ror  $0001
6f 01 00 bbr6 $01,$30ca  **

70 00	 bvc  $30cc
71 00	 adc  ($00),y
72 00	 adc  ($00),z
73 01 00 bvs  $30d3	 ++
74 00	 stz  $00,x
75 00	 adc  $00,x
76 00	 ror  $00,x
77 00	 rmb7 $00	 **
78	 sei
79 01 00 adc  $0001,y
7a	 ply				pull from stack in y-register
7b	 tba		 !!!...
7c 01 00 jmp  ($0001,x)  !!!...
7d 01 00 adc  $0001,x
7e 01 00 ror  $0001,x
7f 01 00 bbr7 $01,$30ed  **

80 00	 bra  $30ff	 ++		branch always (relativ)
81 00	 sta  ($00,x)
82 00	 sta  ($00,sp),y !!!!		SP - StackPointer, like 65c816
83 01 00 bra  $30f6	 ++!!		branch always ( direkt or relativ long)
84 00	 sty  $00
85 00	 sta  $00
86 00	 stx  $00
87 00	 smb0 $00	 **		set bit 0, ZP
88	 dey
89 00	 bit  #$00
8a	 txa
8b 01 00 sty  $0001,x
8c 01 00 sty  $0001
8d 01 00 sta  $0001
8e 01 01 stx  $0001
8f 00 00 bbs0 $00,$3111  **

90 00	 bcc  $3113
91 00	 sta  ($00),y
92 00	 sta  ($00),z
93 01 00 bcc  $311a	 ++
94 00	 sty  $00,x
95 00	 sta  $00,x
96 00	 stx  $00,y
97 00	 smb1 $00	 **
98	 tya
99 01 00 sta  $0000,y
9a	 txs
9b 01 00 stx  $0001,y
9c 01 00 stz  $0001
9d 01 00 sta  $0001,x
9e 01 00 stz  $0001,x
9f 01 00 bbs1 $01,$3136  **

a0 00	 ldy  #$00
a1 00	 lda  ($00,x)
a2 00	 ldx  #$00
a3 00	 ldz  #$00
a4 00	 ldy  $00
a5 00	 lda  $00
a6 00	 ldx  $00
a7 00	 smb2 $00	  **
a8	 tay
a9 00	 lda  #$00
aa	 tax
ab 01 00 ldz  $0001
ac 01 00 ldy  $0001
ad 01 00 lda  $0001
ae 01 00 ldx  $0001
af 01 00 bbs2 $01,$3159  **

b0 00	 bcs  $315b
b1 00	 lda  ($00),y
b2 00	 lda  ($00),z
b3 01 00 bcs  $3162	 ++
b4 00	 ldy  $00,x
b5 00	 lda  $00,x
b6 00	 ldx  $00,y
b7 00	 smb3 $00	  **
b8	 clv
b9 01 00 lda  $0001,y
ba	 tsx
bb 01 00 ldz  $0001,x
bc 01 00 ldy  $0001,x
bd 01 00 lda  $0001,x
be 01 00 ldx  $0001,y
bf 01 00 bbs3 $01,$317e  **

c0 00	 cpy  #$00
c1 00	 cmp  ($00,x)
c2 00	 cpz  #$00
c3 00	 dew  $00	 ??word
c4 00	 cpy  $00
c5 00	 cmp  $00
c6 00	 dec  $00
c7 00	 smb4 $00	 **
c8	 iny
c9 00	 cmp  #$00
ca	 dex
cb 01 00 asw  $0001	 ??word
cc 01 00 cpy  $0001
cd 01 00 cmp  $0001
ce 01 00 dec  $0001
cf 01 00 bbs4 $01,$31a1  **

d0 00	 bne  $31a3
d1 00	 cmp  ($00),y
d2 00	 cmp  ($00),z
d3 00 00 bne  $31aa	+++
d4 00	 cpz  $00
d5 00	 cmp  $00,x
d6 00	 dec  $00,x
d7 00	 smb5 $00	**
d8	 cld
d9 01 00 cmp  $0001,y
da	 phx
db	 phz
dc 01 00 cpz  $0001
dd 01 00 cmp  $0001,x
de 01 00 dec  $0001,x
df 01 00 bbs5 $01,$31c4 ** 

e0 00	 cpx  #$00
e1 00	 sbc  ($00,x)
e2 00	 lda  ($00,sp),y !!!
e3 00	 inw  $00	 ??word
e4 00	 cpx  $00
e5 00	 sbc  $00
e6 00	 inc  $00
e7 00	 smb6 $00	 **
e8	 inx
e9 00	 sbc  #$00
ea	 nop
eb 01 00 row  $0001	 ??word
ec 01 00 cpx  $0001
ed 01 00 sbc  $0001
ee 01 00 inc  $0001
ef 01 00 bbs6 $00,$31e7  **

f0 00	 beq  $31e9
f1 00	 sbc  ($00),y
f2 00	 sbc  ($00),z
f3 01 00 beq  $31f0	 ++
f4 01 00 phw  #$0001	 !!word, immediate!!
f5 00	 sbc  $00,x
f6 99	 inc  $00,x
f7 00	 smb7 $00
f8	 sed
f9 01 00 sbc  $0001,y
fa	 plx
fb	 plz
fc 01 00 phw  $0001	 !!word
fd 01 00 sbc  $0001,x
fe 01 00 inc  $0001,x
ff 01 00 bbs7 $01,$320b  **

==========================================================================

 Welp, there ya have it. A good rough draft start. As mentioned in the
header there is a binary file of this exact dump availible. So far though
the TPUG c65 disk is a myth and will be until it is _full_ but the files
for it will be avalible on the BBS's listed below. Otherz will be there
also, like a wee ML thing that showz all the text charz and
colour_code/atributez availible and MultiColour mode.

 In the next couple of dayz we'll have at the WORD OpCodes and see whatz
what. Our first attemp went for not! PHW #$bb77 : RTS ..and we couldn't
find it *anywhere*!! <PusH Word immediate?>

								}>ug..
Last minute Newz!
 The WORD opz generaly relate to the Stack and the _EXTENDED_STACK_.
ES is in at $1100, heavely used by the system. Simply amazing! Kind of
remindz one of UNIX type systemz. System/User Stack..  oh boy.

==========================================================================
}-{ighlander BBS, 416+588+0922, 3/12/24oo, C=/ascii/ansi, NISSA/Image Net.

}>ug.. @ CBM (Node28) :NISSA
TPUG SYSOP	      :CRSo
TPUG SYSOP 1:229/15.0 :Fido
tpug.sysop@canrem.com



 Ok, I know all those z-Register commands, but there are some I dont
know, like BBS0-BBS7.
Also there are the W commands (DEW,  ROW, ...). Looks like they are
WORD (16 bit) commands, working on stack and/or zeropage,.
Another question is the PC, is it true 24 Bit or not??
Could be the B commands (TRB,..) working directly on the bank
register.??

I'm still looking forward for an answer by Fred Bowen, posting the
4510 data-sheet....


Please post any changes, suggestions to this list directly to me...
I will correct and post it again. Any test programs, for bank
switching are welcome...

Bye,
Simon.


Some stuff for the c65 [sixty-FIVE] crowd, Newz and more Questionz!
						  [Suggest adding to FAQ]

Lets start with the Monitor;

    pc   sr ac xr yr ZR sp
; 000000 00 00 00 00 00 00

A new register, and opcodez to match!

LDZ $0000 : LDZ $0000,x  ..etc.

The whole family is there with it, all the branches, comparez, transferz ..etc.
[inz, dez]
What is missing for this one is Zero page stuff!

No; LDZ $aa : STZ $aa  ..etc. Assembling this in the Monitor nets the Absolute
version; LDZ $00aa.

--------------

  Also notice that the ProgramCounter has 3 bytez/6 digitz!

  Disassembling will WRAP to next BANK!

df0fffe
.f0fffe b1 fa    lda  ($fa),y
.f10000 ff ff 02 bbs7 $ff,$0005  ;gadzookx, what's this code..?!

--------------

  Next are some OpCodez we *alwayz* wanted!

 PHA : PLA
 PHX : PLX
 PHY : PLY
 PHZ : PHZ

 BRA ;BRanch Alwayz!

 TYS ;Tranzfer y to Stack
 TSY ;	 Stack to y
 TSX ;	 Stack to x
 TXS ;	 x to Stack

There are quite a few more.

--------------

There are many in the Gadzookx category!

The most baffling one I have seen is MAP! Usualy preceeded with a loading of
a, x, y and z. Then MAP. Could this be connected directly to the frankenstein
MMU? Might be nice! ..oh, possibly the DAT [Direct Adress Tranzlator]?

How about TRB, TSB, NEG, SEE, DEW, ROW, ASW, CLE, PHW, CLV,


BBS7 $00,0000
BBR7 $00,0000

SMB2 $00
RMB5 $00
   ^
   This value ranges from 0 to 7, proll'y branching on bitz ON/OFF.

Going to need Fred for this stuff!