Opcode

hexcode

P1

P2

P3

description

Operation

Flags

bcall

addr

Call routine

bjump

addr

Unconditional jump

Pc ß addr

bjeq

addr

Jump if equal

bjne

addr

Jump if not equal

bjlo

addr

Jump if lower (unsigned)

bjless

addr

Jump if less (signed)

bjumpx

addr

b

Jump to (addr + b) where b is signed.

bclr

var

Clear variable

*a ß 0

binc

a

Increment variable

*a ß *a + 1

Z,C,N

bdec

a

Decrement variable

*a ß *a � 1

Z,C,N

bneg

a

Negate variable

*a ß 0 - *a

Z,C,N

bcomp

a

Ones Complement varialbe

*a ß 0xffff - *a

Z,C,N

bxchag

a

Xchange a�s high and low nibble.

bpush

a

Push a to stack

bpop

a

Pop a from stack

bpushi

imm

Push imm to stack

bldi

a

imm

Loads imm into a

*a ß imm

baddi

a

imm

Adds imm to a

*a ß *a + imm

Z,C,N

bsubi

a

imm

Subtracts imm from a

*a ß *a - imm

Z,C,N

bandi

a

imm

Logical �AND� imm to a

*a ß *a & imm

Z

bori

a

imm

Logical �OR� imm to a

*a ß *a | imm

Z

bxori

a

imm

Logical �XOR� imm to a

*a ß *a ^ imm

Z

bbitti

a

imm

Bit test imm and a

*a & imm

Z

bmov

a

b

Copies b to a

*a ß *b

blea

a

b

Loads address of b into a

*a ß &b

bswap

a

b

Swaps b with a

i = *a ; *a = *b; *b=i

badd

a

b

Adds b to a

*a ß *a + *b

Z,C,N

baddc

a

b

Adds b and carry to a

*a ß *a + *b + C

Z,C,N

bsub

a

b

Subtracts b from a

*a ß *a - *b

Z,C,N

bsubc

a

b

Subtracts b+C from a

*a ß *a � (*b + C)

Z,C,N

band

a

b

Logical and a and b

*a ß *a & *b

Z

bor

a

b

Logical or a and b

*a ß *a | *b

Z

bxor

a

b

Logical xor a and b

*a ß *a ^ *b

Z

bbitt

a

b

Bit test a and b

*a & *b

Z

bload

a

b

Loads a with contents of address b

bstore

a

b

Stores b at address a

bloadx

a

b

c

bstorex

a

b

c

bdiv

a

b

c

bmult

a

b

c

bcopy

a

b

c

Copies buffer b of length c to a

bcmpn

a

b

c

Compairs buffer b of length c to a