ZiLOG Z8 Series

Z8
®
CPU
User Manual
UM001604-0108 Instruction Set
151
CP dst, src
dst − src
† A[ ] [[[[––
DA dst R 40 [[[X––
dst ← DA dst IR 41
DEC dst R 00 – [ [ [ – –
dst ← dst–1 IR 01
DECW dst R R 80 – [ [ [ – –
dst ← dst–1 IR 81
DI dst
IMR(7) ← 0
8 F ––––––
DJNZr, dst RA rA ––––––
r ← r–1
if r ≠ 0
PC ← PC + dst
Range:+127, –128
r = 0-F
EI 9 F ––––––
IMR(7) ← 1
HALT 7 F ––––––
INC dst
dst ← dst + 1
rrE–[[[––
r = 0-F
R20
IR 21
INCW dst RR A0 – [ [ [ – –
dst ← dst + 1 IR A1
Instruction
and Operation
Address
Mode
Op Code
Byte (Hex)
Flags Affected
dst src C Z S V D H
IRET
FLAGS←@SP;
SP ← SP + 1
PC ← @SP;
SP ← SP + 2;
and IMR(7)–1
B F [[[[[[
Table 39. Summary of Z8 Instruction Set (Continued)
Instruction and Operation
Address Mode
Op Code
Byte (Hex)
Flags Affected
dst src C Z S V D H