Rabbit 2000 - 11. Timers

Instruction Reference Manual 113
Description
If the condition f is false, then the instruction is ignored. If the condition f is true, then the instruction loads the
low order byte of PC with the data at the memory address in SP then loads the high order byte of PC with the
data at the memory address immediately following the one held in SP and the data in SP is then incremented
twice.
The condition f is one of the following:
• NZ Z flag not set
• Z Z flag set
• NC Cflagnotset
• C C flag set
• LZ/NV L/V flag is not set
• LO/V L/V flag is set
• P S flag not set
• M Sflagset.
RET f
Opcode Instruction Operation
——
C0
C8
D0
D8
E0
E8
F0
F8
RET f
RET NZ
RET Z
RET NC
RET C
RET LZ
RET LO
RET P
RET M
If {f}PC
(low)
= (SP); PC
(high)
= (SP + 1); SP = SP + 2
If {NZ} PC
(low)
= (SP); PC
(high)
= (SP + 1); SP = SP + 2
If {Z} PC
(low)
= (SP); PC
(high)
= (SP + 1); SP = SP + 2
If {NC} PC
(low)
= (SP); PC
(high)
= (SP + 1); SP = SP + 2
If {C} PC
(low)
= (SP); PC
(high)
= (SP + 1); SP = SP + 2
If {LZ} PC
(low)
= (SP); PC
(high)
= (SP + 1); SP = SP + 2
If {LO} PC
(low)
= (SP); PC
(high)
= (SP + 1); SP = SP + 2
If {P} PC
(low)
= (SP); PC
(high)
= (SP + 1); SP = SP + 2
If {M} PC
(low)
= (SP); PC
(high)
= (SP + 1); SP = SP + 2
Clocking: 2; 8 (2,1,2,2,1)
Flags ALTD I/O
S Z L/V C F R SP S D
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