Rabbit 2000 - Page 45

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
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