IBM 5150 - Page 216

SBB = Subtract with borrow
Register/memory and register to either
o 0 0 1 1 0 d w 1 mod reg r /m
Immediate from register/memory
1 0 0 0 0 0 s w 1 mod 0 1 1 rIm data
dataifs:w=01
Immediate from accumulator
0001110w
data
data
if w = 1
DEC = Decrement
Register/memory
1111111w mod 0 0 1 rIm
Register
o 1 0 0 1 reg
NEG = Change sign
1 1 1
101 w mod 0 1 1 rIm
CMP = Compare
Register/memory and register
o 0 1 1 1 0 d w 1 mod reg rIm
Immediate
with register/memory
1 0 0 0 0 0 s w 1 mod 1 1 1 rIm data data
if s:w = 01
Immediate with accumulator
0011110wl data
data
if w = 1
AAS = ASCII adjust
for subtact
001111111
DAS = Decimal adjust
for subtact
001011111
MUL = Multiply (unsigned)
1 1 1 1 0 1 1 w 1 mod 1 0 0 rIm
IMUL = Integer multiply (signed)
1 1 1 1 0 1 1 w 1
mod 1 0 1 rIm
AAM = ASCII adjust for multiply
1101010000001010
DIV = Divide (unsigned)
1 1 1 1 0 1 1 w mod 1 1 0 r /m
Instruction Set 6-9