eZ80
®
CPU
User Manual
UM007714-0908 CPU Instruction Set
357
SUB A, (HL)
Subtract without Carry
Operation
A ← A–(HL)
Description
The (HL) operand is an 8-bit value at the memory location specified by the contents of the
multibyte register (HL). This 8-bit value is subtracted from the contents of the accumula-
tor, 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)
SUB A,(HL) X 2 96
SUB.S A,(HL) 1 3 52, 96
SUB.L A,(HL) 0 3 49, 96
To Next Page
Loading...