ZiLOG Z8 Technical Manual

JP
Jump
JP cc,dst
Instruction For.at:
OPC
Address Mode
Conditional
Cycles
(Hex)
dst
~ __ c_c __ ~ ___ O_p_C __ ~11 ~ ___________ d_s_t __________ ~
12 if jump taken ccO
OA
10
if jump
not taken
Unconditional cc=O
to
F
~ ______ OP_C ______ ~II ~ _______ d_s_t ______ ~
8 30
IRR
Operation:
Flags:
Example:
Note:
If cc is true, PC <-- dst
A conditional jump transfers Program Control to the destination address if the
condi tion specified by "cc" is true; otherwise, the instruction following the JP
instruction is executed. See Section 6.4 for a list of condition codes.
The unconditional jump simply replsces the contents of the Program Counter with the
contents of the specified register pair. Control then passes to the statement
addressed by the PC, decremented by one.
No flags affected
If the carry flag is set, the statement
JP C,%1520
replaces the contents of the Program Counter with %1520 and transfers control to that
location. Had the carry flag not been set, control would have fallen through to the
statement following the JP.
When used to specify a 4-bit working-register pair address, address mode IRR uses the
format:
E
dst
5-25

ZiLOG Z8 Specifications

General

Brand	ZiLOG
Model	Z8
Category	Desktop
Language	English