Another World Byte codes

Another World Opcode List

00 FF 00 04 00 F6 00 01 00 E3 00 00 00 32 00 00 06
<bh:00><bh:ff><bh:00><bh:04><bh:00><bh:f6><bh:00><bh:01><bh:00><bh:e3><bh:00><bh:00><bh:00>2<bh:00><bh:00><bh:06>

3f9fd

Set.i	Vn, Imm16
00 DD NNNN

Set	Vd, Vs
01 DD SS

Add	Vd, Vs
02 DD SS

Add.i	Vn, Imm16
03 DD NNNN

Jsr	Address
04 AAAA

return
05

break
06

Jmp	Address
07 AAAA

SetVec	Nb, Address
08 VV AAAA

dbra	Vn, Address
09 VV AAAA


Si(Vn,Vn):
Si Vn = Vn	Jmp Address
0A 80 VV WW AAAA

Si Vn <> Vn	Jmp Address
0A 81 VV WW AAAA

Si Vn > Vn	Jmp Address
0A 82 VV WW AAAA

Si Vn => Vn	Jmp Address
0A 83 VV WW AAAA

Si Vn < Vn	Jmp Address
0A 84 VV WW AAAA

Si Vn <= Vn	Jmp Address
0A 85 VV WW AAAA


Si(Vn,Imm8):
Si Vn = Imm8	Jmp Address
0A 00 VV WW AAAA

Si Vn <> Imm8	Jmp Address
0A 01 VV WW AAAA

Si Vn > Imm8	Jmp Address
0A 02 VV WW AAAA

Si Vn => Imm8	Jmp Address
0A 03 VV WW AAAA

Si Vn < Imm8	Jmp Address
0A 04 VV WW AAAA

Si Vn <= Imm8	Jmp Address
0A 05 VV WW AAAA


Si(Vn,Imm16):
Si Vn = Imm16	Jmp Address
0A 40 VV WWWW AAAA

Si Vn <> Imm16	Jmp Address
0A 41 VV WWWW AAAA

Si Vn > Imm16	Jmp Address
0A 42 VV WWWW AAAA

Si Vn => Imm16	Jmp Address
0A 43 VV WWWW AAAA

Si Vn < Imm16	Jmp Address
0A 44 VV WWWW AAAA

Si Vn <= Imm16	Jmp Address
0A 45 VV WWWW AAAA


Fade PalNb
0B NN 00?

Vec Start, End, Unlock
0C SS EE 00

Vec Start, End, Lock
0C SS EE 01

Vec Start, End, Clean
0C SS EE 02

SetWS Nb
0D NN

Clr Nb, Color
0E NN 0C

Copy Ss Sd
0F SS DD

Show NN
10 NN

Bigend
11

Text TxtNb, X, Y, Color
12 TTTT XX YY 0C

Sub Vd, Vs
13 DD SS

And.i Vn,Imm16
14 VV IIII

Or.i Vn,Imm16
15 VV IIII

Lsl Vn, Imm16
16 VV IIII

Lsr Vn, Imm16
17 VV IIII

Play FileNb, Note, Volume, Channel
18 FFFF NN VV CC

Load FileNb
19 FFFF

Song FileNb, Tempo, Position
1A FFFF TTTT PP


Spr.s Addr, X, Y
(80 || AA) AA XX YY


Spr.l Addr, X, Y, (Z)
01XXYYZZb AAAA (XX)XX (YY)YY (ZZZZ)
0=00=Imm16
1=01=Variable
2=10=Imm8
3=11=No Z or X||100


Spr.l Addr, X16, Y16, Z16
40 AAAA XXXX YYYY ZZZZ

Spr.l Addr, X8, Y8, Z8
6B AAAA XX YY ZZ

Spr.l Addr, VX, VY, VX
55 AAAA VX VY VX


Polygon Format:
[C0||Color] LL HH PP
XX YY [...*PP]

GM Format:
02 RX RY NN
CHHHHHHHb HH RX RY (MCCCCCCCb MM)

Screen Buffers:
0=Plain Color
1=Double Buffer
2=Double Buffer
3=Background
254=Visible Screen
255=Invisible Screen

Palette Format:
0000RRRRGGGGBBBBb

Compression:
Backwards.
[18:51] <@Seru-kun> https://github.com/fabiensanglard/Another-World-Bytecode-Interpreter/blob/master/bank.cpp
[18:56] <@hcs> wow, yeah, that's pretty hard to read
[18:57] <@hcs> but it looks like the whole getCode, nextChunk, rcr thing is just pulling off bits
[18:58] <@hcs> everything is run backwards, for whatever reason
[18:59] <@hcs> storage mode is indicated by two or three bit prefixes, these are what the ifs starting at 93 do
[19:01] <@hcs> 00 is a string of literal bytes, the next three bits give the number-1, (that's the meaning of decUnk(8,0)
[19:01] <@hcs> er, decUnk1(3,0)
[19:02] <@hcs> decUnk2 looks like LZ77, with decUnk2(8) (prefix 01) you have a 8 bit backreference length
[19:03] <@hcs> backref distance, rather
[19:04] <@hcs> prefix 01 only does 2 bytes, but it can be 1 to 256 bytes back
[19:05] <@hcs> notice how line 77 adds i, the backref distance, whereas most processing is done with decrements, so we're reaching back in the already decompressed data
[19:06] <@hcs> The other prefixes are just different variations on the same theme, 111 is literals, 8 bit length + 8 + 1 (the second arg in decUnk1(8, 8) indicates an additional to the count)
[19:06] <@hcs> *an addition
[19:07] <@hcs> this nicely complements the decUnk1(3,0), which can give you up to 8, decUnk1(8,8) can give you from 9 to 255+9
[19:08] <@hcs> 110 is followed by an 8 bit backreference length (-1) with is used by decUnk(12), so there's also a 12 bit backreference distance
[19:09] <@hcs> 100 and 101 have a fixed length (3 and 4 respectively) and 9 or 10 bit backreference dists



Source Codes:
code0:

start	jsr	init
	setvec	60	flip10
	seti	v255	4
	seti	v246	1
	seti	v227	0
	seti	v50	0
	break
	play	106	20	0	2
	play	106	20	0	3
	play	106	20	0	1
	play	106	20	0	0
	jsr	initiz
	jsr	setmar
	jsr	inic
	jsr	mun1
	setvec	20	nag1
	setvec	21	nag2
	setvec	20	mard1a
	seti	v99	2
	si	v4	=	48	suit


code1:

snes1	setvec	1	fdera1
zic01	song	4025	0	1
	setvec	2	derape
	setvec	3	plan1
	setvec	60	flip10
	bigend
stopv	bigend
flip1	addi	v199	1
	show	255
	setws	255
	si	v250	<>	0	exit
	copy	64	255
	break
	jmp	flip1
flip10	addi	v199	1
	show	255
	setws	255
	copy	0	255
	break
	addi	v199	1


code2:

room	draw.s	screen	228	85
	draw.s	lester	110	101
	draw.s	lines	160	100
	draw.s	light	136	35
	color	17	255
	bigend


code3:

step	draw.s	shoe1	229	98
	break
	draw.s	shoe3	230	97
	break
	draw.s	shoe5	230	97
	break
	draw.s	shoe7	230	98
	break
	draw.s	shoe9	229	97
	break
	draw.s	shoe11	229	97
	sound	60	20	63	0
	break
	draw.s	shoe13	230	97
	break
	draw.s	shoe15	229	98
	break
	draw.s	shoe17	230	97
	break
	draw.s	shoe19	231	98


code4:

	load	45
	jmp	snes1
	load	137
	load	2
	load	129
	load	3
snes1	play	48	0	0	0
	play	48	0	0	1
	play	48	0	0	2
	play	48	0	0	3
	setvec	60	flip1
	seti	v12	0
	seti	v4	0
	seti	v254	0
	seti	v1	0
	seti	v255	7
	break
	jsr	prot1
	si	v0	=	12	dessus
	si	v0	>	12	start3


code5:

fpis	spr.s	pis24	160	100
	spr.s	pis1	160	100
	spr.s	pis25	160	100
	spr.s	pis11	160	100
	spr.s	pis10	160	100
	spr.s	pis2	160	100
	spr.s	pis3	160	100
	spr.s	pis7	160	100
	spr.s	pis8	160	100
	spr.s	pis9	160	100
	spr.s	pis12	160	100
	spr.s	pis13	160	100
	spr.s	pis17	160	100
	spr.s	pis18	160	100
	spr.s	pis19	160	100
	spr.s	pis20	160	100
	spr.s	pis21	160	100
	spr.s	pis26	160	100
	return
	bigend


code6:

start	jsr	init
zic01	song 	4001	0	3
	seti	v227	0
	si	v219	=	0	snes2
	load	2002
	jmp	snes1
snes2	load	48
	load	50
	load	57
	load	62
	load	16
	load	8
	load	81
	load	49
	load	50
	load	53
	load	57
	load	58


code7:

start	jsr	init
	seti	v227	0
	seti	v255	4
	seti	v246	1
	seti	v50	0
	seti	v182	0
	seti	v10	0
	seti	v239	0
	si	v191	=	1	hard
	seti	v239	105
hard	jsr	son1
	play	85	20	0	1
	play	85	20	0	2
	play	85	20	0	3
	play	85	20	0	0
	si	v0	=	24	start2
	si	v0	=	26	start3
	setvec	60	flip10
	???
	jsr	snes3


code8:

desa	setvec	34	desa2
	setvec	35	desa1
	setvec	20	joy2
	setvec	21	bal4
	setvec	0	first1
	seti	v0	21
	jsr	snes4
	jsr	fond1
	bigend
prot1	return
	set	v248	v188
	andi	v248	16
	return
	si	v248	=	0	prot1a
	si	v242	<>	4000	prot1a
	return
prot1a	vec	0	63	2
	setvec	60	stopv
	bigend
dead1	break