Zilog EZ80F916 - Manual (Page 370)

eZ80
®
CPU
User Manual
UM007715-0415 CPU Instruction Set
361
SUB A, r
Subtract without Carry
Operation
A  A – r
Description
The r operand is any of the 8-bit CPU registers A, B, C, D, E, H, or L. The r operand is
subtracted from the contents of the accumulator, A. The result is written to the accumula-
tor.
Condition Bits Affected
Attributes
jj
identifies the A, B, C, D, E, H, or L register and is assembled into one of the opcodes
indicated in Table 102 .
S
Set if result is negative; reset otherwise.
Z
Set if result is 0; reset otherwise.
H
Set if borrow from bit 4; reset otherwise.
P/V
Set if overflow; reset otherwise.
N
Set.
C
Set if borrow; reset otherwise.
Mnemonic Operand ADL Mode Cycle Opcode (hex)
SUB
A,r X 1
jj