eZ80
®
CPU
User Manual
UM007714-0908 CPU Instruction Set
121
CP A, n
Compare with Accumulator
Operation
A – n
Description
The 8-bit immediate value
n
is compared with (subtracted from) the contents of the accu-
mulator, A. The execution of this instruction does not affect the contents of the accumula-
tor.
Condition Bits Affected
Attributes
S Set if result is negative; reset otherwise.
Z Set if A = n; 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)
CP A,n X2FE nn
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