![background image](http://html1.mh-extra.com/html/rabbit/2000/2000_instruction-and-reference-manual_3112735045.webp)
Instruction Reference Manual
41
Description
Decrements the data in ss (any of BC, DE, HL, or SP).
DEC
ss
Opcode
Instruction
Clocks
Operation
——
0B
1B
2B
3B
DEC
ss
DEC BC
DEC DE
DEC HL
DEC SP
2
2
2
2
2
ss
=
ss
- 1
BC = BC - 1
DE = DE - 1
HL = HL - 1
SP = SP - 1
Flags
ALTD
I/O
S
Z
L/V
C
F
R
SP
S
D
-
-
-
-
•
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...