Virtual Machine Instruction Set

Virtual Machine Instruction Set - broken down by value

Commands with Type 0-3 have 16 bits of Opcode and 48 bits for Parameters.
Commands with Type 4-6 have 12 bits of Opcode and 52 bits for Parameters.
Commands with Type 7 are unknown at this stage, and have never been seen in real life yet.

Opcode						Parameters
0			1			2			3			4			5			6			7	<- Byte
7-5	4	3-0	7	6-4	3-0	7-4	3-0		7-0			7-0			7-0			7-4	3-2	1-0	7-0	<- Bits
Type	Direct	SET	Dir Cmp	CMP	CMD	operand 1						operand 2						operand 3				Mnemonic	Operands
0			X	0	0																	NOP
0			X	0	1																line#	Goto	line#
0			X	0	2																	Break
0			X	0	3													0	lvl		line#	SetTmpPML	lvl, line#
0			0	1-7	0-3				cr1*						cr2*			as above				Cplus above	reg(cr1) cmp-op reg(cr2) plus above
0			1	1-7	0-3				cr1*			cval						as above				Cplus above	reg(cr1) cmp-op #cval plus above
0	X	X	X	X	4-F	X						X						X				invalid
1	0		X	0	0																	NOP
1	0		X	0	1													Link subset				Link subset
1	0		X	0	4													pgcn				LinkPGCN	pgcn
1	0		X	0	5													hl_bn		pttn		LinkPTTN	pttn [,button=hl_bn]
1	0		X	0	6													hl_bn		0	pgn	LinkPGN	pgn [,button=hl_bn]
1	0		X	0	7													hl_bn		0	cn	LinkCN	cn [,button=hl_bn]
1	0		0	1-7	0, 1, 4-7				cr1*						cr2*			as above				Cplus above	reg(cr1) cmp-op reg(cr2) plus above
1	0		1	1-7	0, 1, 4-7				cr1*			cval						as above				Cplus above	reg(cr1) cmp-op #cval plus above
1	0	X	X	X	2, 3, 8-F	X						X						X				invalid
1	1		X	0	0																	NOP
1	1		X	0	1																	Exit
1	1		X	0	2										ttn							JumpTT	ttn
1	1		X	0	3										ttn							JumpVTS_TT	ttn
1	1		X	0	5			pttn							ttn							JumpVTS_PTT	ttn pttn
1	1		X	0	6										0							JumpSS	FP
1	1		X	0	6										1		menu					JumpSS	VMGM menu
1	1		X	0	6				ttn			vts			2		menu					JumpSS	VTSM vts, ttn, menu
1	1		X	0	6	pgcn									3							JumpSS	VMGM pgcn
1	1		X	0	8							rsm_cell			0							CallSS	FP [rsm_cell]
1	1		X	0	8							rsm_cell			1		menu					CallSS	VMGM menu [, rsm_cell]
1	1		X	0	8							rsm_cell			2		menu					CallSS	VTSM menu [, rsm_cell]
1	1		X	0	8	pgcn						rsm_cell			3							CallSS	VMGM pgcn [, rsm_cell]
1	1			1-7	0-3, 5, 6, 8	as above						as above						cr1*			cr2*	Cplus above	reg(cr1) cmp-op reg(cr2) plus above
1	1	X	X	X	4, 7, 9-F	X						X						X				invalid
2	X	0	X	0	0																	NOP
2	0	1	X	0	0				af		sr1	sf		sr2	nf		sr3					SetSTN	if(af) Audio = Gsr1 if(sf) Subpicture = Gsr2 if(nf) Angle = Gsr3
2	0	2	X	0	0				srs*			pgcn										SetNVTMR	srs, pgcn
2	0	3	X	0	0				srs*						mf		srd					SetGPRMMD	Gsrd = srs [,COUNTER](mf=1)
2	0	4	X	0	0												srs					SetAMXMD	Gsrs
2	0	6	X	0	0												srs					SetHL_BTNN	Gsrs
2	1	1	X	0	0				af	aval		sf	sval		nf	nval						SetSTN	if(af) Audio = #aval if(sf) Subpicture = #sval if(nf) Angle = #nval
2	1	2	X	0	0	sval						pgcn										SetNVTMR	#sval, pgcn
2	1	3	X	0	0	sval									mf		srd					SetGPRMMD	Gsrd = #sval [,COUNTER](mf=1)
2	1	4	X	0	0							sval										SetAMXMD	#sval
2	1	6	X	0	0							sval										SetHL_BTNN	#sval
2	as above	as above		1-7	0	as above						as above						cr1*			cr2*	Cplus above	reg(cr1) cmp-op reg(cr2) plus above
2	as above	as above	X	0	1, 4-7	as above						as above						as per link				as above // as per link	as above // as per link
2	X	7-F	X	X	X	X						X						X				invalid SetSystem
2	X	X	X	0	2, 3, 8-F	X						X						X				invalid Link
2	X	X	X	1-7	1-F	X						X						X				illegal - CMP & LNK conflict
3	X	0	X	0	0																	NOP
3	0	1-B	X	0	0						srd				srs*							Set	Gsrd set-op reg(srs)
3	1	1-B	X	0	0						srd	sval										Set	Gsrd set-op #sval
3	as above	as above	0	1-7	0	cr1*			as above			as above									cr2*	Cplus above	reg(cr1) cmp-op reg(cr2), plus above
3	as above	as above	1	1-7	0	cr1*			as above			as above						cval				Cplus above	reg(cr1) cmp-op #cval, plus above
3	as above	as above	X	0	1, 4-7	as above						as above						as per link				as above // as per link	as above // as per link
3	X	C-F	X	X	X	X						X						X				invalid Set
3	X	X	X	0	2, 3, 8-F	X						X						X				invalid Link
3	X	X	X	1-7	1-F	X						X						X				illegal - CMP & LNK conflict

Opcode					Parameters
0			1			2	3	4	5	6		7		<- Byte
7-5	4	3-0	7	6-4	3-0	7-0	7-0	7-0	7-0	7-2	1-0	7-0		<- Bits
Type	SET Flag	SET	CMP Flag	CMP	operand 1			operand 2		operand 3				Mnemonic	Operands
4	0	set-op	0	cmp-op	scr		srs*		cr2*	hl_bn			Lnk	SetCLnk	Gscr set-op reg(srs), Gscr cmp-op reg(cr2) [, button=hl_bn]
4	0	set-op	1	cmp-op	scr		srs*	cval		hl_bn			Lnk	SetCLnk	Gscr set-op reg(srs), Gscr cmp-op #cval [, button=hl_bn]
4	1	set-op	0	cmp-op	scr	sval			cr2*	hl_bn			Lnk	SetCLnk	Gscr set-op #sval, Gscr cmp-op reg(cr2) [, button=hl_bn]
4	1	set-op	1	cmp-op	scr	sval		cval		hl_bn			Lnk	SetCLnk	Gscr set-op #sval, Gscr cmp-op #cval [, button=hl_bn]
5	0	set-op	0	cmp-op	sr1	sr2*	cr1*		cr2*	hl_bn			Lnk	CSetCLnk	Gscr cmp-op reg(cr2), Gscr set-op reg(srs) [, button=hl_bn]
5	0	set-op	1	cmp-op	sr1	sr2*	cr1*	cval		hl_bn			Lnk	CSetCLnk	Gscr cmp-op #cval, Gscr set-op reg(srs) [, button=hl_bn]
5	1	set-op	0	cmp-op	sr1	sval2		cr1	cr2*	hl_bn			Lnk	CSetCLnk	Gscr cmp-op reg(cr2, Gscr set-op #sval [, button=hl_bn]
5	1	X	1	X										Illegal CSetCLnk
6	0	set-op	0	cmp-op	sr1	sr2*	cr1*		cr2*	hl_bn			Lnk	CmpSetLnk	Gsr1 cmp-op reg(cr2), Gsr1 set-op reg(srs) [, button=hl_bn]
6	0	set-op	1	cmp-op	sr1	sr2*	cr1*	cval		hl_bn			Lnk	CmpSetLnk	Gsr1 cmp-op #cval, Gsr1 set-op reg(srs) [, button=hl_bn]
6	1	set-op	0	cmp-op	sr1	sval		cr1*	cr2*	hl_bn			Lnk	CmpSetLnk	Gsr1 cmp-op reg(cr2, Gsr1 set-op #sval [, button=hl_bn]
6	1	X	1	X										Illegal CmpSetLnk
7														unknown

* register values 0-15 (0x00 - 0x0f) refer to General Purpose registers (GPRM), 16-127 (0x10 - 0x7f) are invalid, 128-151 (0x80 - 0x97) refer to System Parameter registers (SPRM), 152-255 (0x98 - 0xff) are invalid.

SET and CMP operations

Instructions using values not mentioned in this table are invalid.

Code	0	1	2	3	4	5	6	7	8	9	a	b
SET op	none	mov =	swp <->	add +=	sub -=	mul *=	div /=	mod %=	rnd	and &=	or \|=	xor ^=
CMP op	none	BC &	EQ ==	NE !=	GE >=	GT >	LE <=	LT <

Link subset codes

operand 3				Mnemonic	Operands
6		7		<- Byte
7-2	1-0	7-5	4-0	<- Bits
X			00	NOP
hl_bn			01	LinkTopCell	[button=hl_bn]
hl_bn			02	LinkNextCell	[button=hl_bn]
hl_bn			03	LinkPrevCell	[button=hl_bn]
hl_bn			05	LinkTopPG	[button=hl_bn]
hl_bn			06	LinkNextPG	[button=hl_bn]
hl_bn			07	LinkPrevPG	[button=hl_bn]
hl_bn			09	LinkTopPGC	[button=hl_bn]
hl_bn			0a	LinkNextPGC	[button=hl_bn]
hl_bn			0b	LinkPrevPGC	[button=hl_bn]
hl_bn			0c	LinkGoupPGC	[button=hl_bn]
hl_bn			0d	LinkTailPGC	[button=hl_bn]
hl_bn			10	RSM	[button=hl_bn]
X	X		04, 08, 0E, 0F, 11-1F	invalid

Virtual Machine Instruction Set - broken down by value

SET and CMP operations

Link subset codes

SetCLnk:Type 4: Set then Compare & Link.

CSetCLnk:Type 5: Compare then Set & Link.

CmpSetLnk:Type 6: Compare then Set, followed by Link.