VM Flow and Math Instructions

Mnemonic	Operand (Size)	Description	Opcode	Flags Affected
Program Flow
nop	-	no operation	0x00	-
brneg	ADDR (2)	branch to ADDR if N set	0x40	-
brpos	ADDR (2)	branch to ADDR if Z clear and N clear	0x41	-
brz	ADDR (2)	branch to ADDR if Z set	0x42	-
brnz	ADDR (2)	branch to ADDR if Z clear	0x43	-
brc	ADDR (2)	branch to ADDR if C set	0x44	-
brnc	ADDR (2)	branch to ADDR if C clear	0x45	-
cmpbbr	ADDR (2)	branch to ADDR if top two bytes are equal	0x46	-
cmpsbr	ADDR (2)	branch to ADDR if top two shorts are equal	0x47	-
goto	ADDR (2)	unconditional branch to ADDR	0x48	-
call	ADDR (2)	execute subroutine at ADDR	0x49	-
return	-	return from subroutine	0x4A	-
exit	-	terminate program execution	0x53	-

Mnemonic	Operand (Size)	Description	Opcode	Flags Affected
Arithmetic Operations
decb	IX (1)	decrement byte at IX	0x24	C,N,Z
decs	IX (1)	decrement short at IX	0x25	C,N,Z
incb	IX (1)	increment byte at IX	0x26	C,N,Z
incs	IX (1)	increment short at IX	0x27	C,N,Z
addb	-	pop byte A, pop byte B, push A+B	0x28	C,N,Z
adds	-	pop short A, pop short B, push A+B	0x29	C,N,Z
subb	-	pop byte A, pop byte B, push A-B	0x2A	C,N,Z
subs	-	pop short A, pop short B, push A-B	0x2B	C,N,Z
negb	-	negate top byte	0x2C	C,N,Z
negs	-	negate top short	0x2D	C,N,Z
multb	-	pop byte A, pop byte B, push A*B	0x2E	N,Z
mults	-	pop short A, pop short B, push A*B	0x2F	C,N,Z
divb	-	pop byte A, pop byte B, push A/B	0x30	N,Z
divs	-	pop short A, pop short B, push A/B	0x31	N,Z
modb	-	pop byte A, pop byte B, push A mod B	0x32	N,Z
mods	-	pop short A, pop short B, push A mod B	0x33	N,Z

Mnemonic	Operand (Size)	Description	Opcode	Flags Affected
Logical Operations
andb	-	pop byte A, pop byte B, push A&B	0x34	N,Z
ands	-	pop short A, pop short B, push A&B	0x35	N,Z
orb	-	pop byte A, pop byte B, push A\|B	0x36	N,Z
ors	-	pop short A, pop short B, push A\|B	0x37	N,Z
xorb	-	pop byte A, pop byte B, push A^B	0x38	N,Z
xors	-	pop short A, pop short B, push A^B	0x39	N,Z
compb	-	complement top byte	0x3A	N,Z
comps	-	complement top short	0x3B	N,Z
rlb	-	pop byte as N, left shift top byte N times	0x3C	C,N,Z
rls	-	pop byte as N, left shift top short N times	0x3D	C,N,Z
rrb	-	pop byte as N, right shift top byte N times	0x3E	C,N,Z
rrs	-	pop byte as N, right shift top short N times	0x3F	C,N,Z

version: 1.0, build 80903