38
Rabbit 2000/3000 Microprocessor
Description
Decrements the byte whose address is:
•
in HL, or
•
the data in IX plus a displacement value d, or
•
the data in IY plus a displacement value d.
DEC (HL)
DEC (IX+
d
)
DEC (IY+
d
)
Opcode
Instruction
Clocks
Operation
35
DEC (HL)
8 (2,1,2,3)
(HL) = (HL) - 1
DD 35
d
DEC (IX+D)
12 (2,2,2,1,2,3)
(IX +
d
) = (IX +
d
) - 1
FD 35
d
DEC (IY+D)
12 (2,2,2,1,2,3)
(IY +
d
) = (IY +
d
) - 1
Flags
ALTD
I/O
S
Z
L/V
C
F
R
SP
S
D
•
•
V
-
•
•
•
Summary of Contents for 2000
Page 2: ...ii Rabbit 2000 3000 Microprocessor...
Page 4: ...iv Rabbit 2000 Microprocessor...
Page 16: ...12 Rabbit 2000 3000 Microprocessor...
Page 164: ...160 Instruction Reference Manual...
