eZ80
®
CPU
User Manual
UM007714-0908 CPU Instruction Set
332
SBC A, n
Subtract with Carry
Operation
A ← A – n – C
Description
The 8-bit immediate value
n
and the Carry Flag (C) are subtracted from the contents of the
accumulator, A. The result is written to the accumulator.
Condition Bits Affected
Attributes
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)
SBC A,n X2DE, nn
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