ZiLOG Z80-CPU Technical Manual page 55

Flags Op-<:ode
Symbolic
Mnemonic Operation C
Z
r"
S N H 76 543 210
ADD HL, ss HL-HL+ss
~
• •
•
0 X 00 ssl 001
ADCHL, ss HL-HL+ss+CY
~
~ V ~
0 X 11 101 101
01 551 010
SBC HL,
SS
HL-HL- 55 -<:Y ~ ~ V ~
I X 11 101 101
01 ssO 010
ADD IX, pp IX-IX+pp
~
•
• •
0 X 11 011 101
00 ppl 001
ADD IY,n IY-IY+rr
~
• • •
0 X II III 101
00 rrl 001
INC 55 55-55+1
• • •
• • •
00 550 011
INC IX
IX - IX + I
•
• • • • •
II Oil 101
00 100 Oil
INC IY IY -IY + I
• • • • • •
II III 101
00 100 011
DEC ss ss
+-
ss - 1
•
•
• • •
•
00 551 011
DEC IX IX-lX-I
•
• •
•
• •
II 011 101
00 101 011
DECIY IY-IY-I
• • • • • •
11 III 101
00 101 Oil
Notes: ss
is
any of lhe register pairs BC, DE, HI., SP
pp is any of the register pairs BC, DE, IX, SP
rr is any of the register pairs BC, DE,IY. SP.
No. No.
of ofM
Bytes Cycles
I 3
2 4
2
4
2
4
2 4
1
1
2 2
2 2
I I
2 2
2 2
Flag Notation: •
=
nag not affected, 0
=
tlag reset, I
=
flag set. X
=
flag is unknown.
~ = nag is affected according to the result of the operation.
16-BIT ARITHMETIC GROUP
TABLE 7.0-6
49
No.
ofT
States Comments
11 ss
Reg.
00 DC
15
01 DE
10 HL
II SP
15
15
pp
Reg.
00
BC
01 DE
10 IX
II SP
15 rr Reg.
00 BC
01
DE
10 IY
11 SP
6
10
10
6
10
10