ZiLOG eZ80 User Manual page 367

SUB A, ir
Subtract without Carry
Operation
A ← A – ir
Description
The ir operand is any of the 8-bit registers IXH, IXL, IYH, or IYL. The ir operand is sub-
tracted from the contents of the accumulator, A. The result is written to the accumulator.
Condition Bits Affected
S
Z
H
P/V
N
C
Attributes
Mnemonic Operand
SUB
SUB
SUB
SUB
UM007714-0908
Set if result is negative; reset otherwise.
Set if result is 0; reset otherwise.
Set if borrow from bit 4; reset otherwise.
Set if overflow; reset otherwise.
Set.
Set if borrow; reset otherwise.
ADL Mode Cycle Opcode (hex)
A,IXH X
A,IXL X
A,IYH X
A,IYL X
2
DD, 94
2
DD, 95
2
FD, 94
2
FD, 95
®
eZ80 CPU
User Manual
358
CPU Instruction Set