ZiLOG Z80 Handbook page 283

Table C-9. Jump Group
Flags OpCode
No. No. No.
Symbolic % of
of m of T
Mnemonic
Operation C Z V S N H 76 543 210 Bytes
Cycles States Comments
JP nn PC - nn 000 011 3 3
10
n
cc Condition
JP cc, nn
If condition cc
•
I I cc 010
3 3 10 000 NZ non zero
is true PC -nn,
001 Z zero
otherwise
010 NC non carry
continue
01l C carry
100 PO parity odd
101 PE parity even
110 P sign positive
JR a PC - PC + e • 00 01 1 000
2 3 12 1 I I M sign negative
JR C, a If C = 0, 00 111 000 2
2 7 If condition not met
continue
e-2
If C = 2
3 12 If condition is met
PC PC+e
JR NC, c IfC = I, 00 110 000
2
2 7 If condition not met
continue
a-2
If C = 0,
2
3 12 If condition is me
PC-PC+e
JR Z, a If Z 0
00 101 000
2
2 7 It condition not met
continue
e-2
IfZ=1,
2 3 2 Ifcondition is met
PCPC+e
JR NZ, a If Z 1, 00 100 000
2
2 7
If condition not me
continue
a-2
If Z = 0, 2
3 12 If condition met
PC-PC+e
JP(HL) PC - HL II 101 001 1 1 4
JP (IX)
PC - IX
I I Ol 1 101
2
2 8
Il 101 001
JP(IY) PC-IY
II 111 101 2 2 8
11 101 001
DJNZ,e B-B-I
00 010 000 2 2 8 1fB=0
If B = 0,
a-2
continue
IfB*0,
2 3 13 IFBS0
PC - PC+e
Notes : e represents the extension in the relative addressing mode,
e is a signed two's complement number in the range <-126, 129>
e-2 in the op-code provides an effective address of pc +e as PC is
incremented by 2 prior to the addition of e.
Flag Notation : • = flag not affected, 0 = flag reset , I = flag set, X = flag is unknown,
flag is affected according to the result of the operation.
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