ZiLOG eZ80 User Manual page 141

DEC (HL)
Decrement
Operation
(HL) ← (HL)–1
Description:
The (HL) operand is an 8-bit value stored at the memory location specified by the contents
of the multibyte register HL. This 8-bit value is decremented by 1.
Condition Bits Affected
S
Z
H
P/V
N
C
Attributes
Mnemonic
DEC
DEC.S
DEC.L
UM007714-0908
Set if result is negative; reset otherwise.
Set if result is 0; reset otherwise.
Set is borrowed from bit 4; reset otherwise.
Set if operand was 80h before operation; reset otherwise.
Set.
Not affected.
Operand ADL Mode
(HL) X
(HL) 1
(HL) 0
Cycle Opcode (hex)
4
35
5
52, 35
5
49, 35
®
eZ80 CPU
User Manual
132
CPU Instruction Set