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µPD750008 USER'S MANUAL
11.3 INSTRUCTION CODES OF EACH INSTRUCTION
(1) Explanations of the symbols for the instruction codes
R
2
0
0
0
0
1
1
1
1
Q
2
0
0
0
1
1
N
5
0
0
0
0
0
0
1
1
1
I
: Immediate data for n4 or n8
n
D
: Immediate data for mem
n
B
: Immediate data for bit
n
N
: Immediate data for n or IExxx
n
T
: Immediate data for taddr x 1/2
n
A
: Immediate data for the address (2 to 16) relative to branch destination address minus one
n
S
: Immediate data for the one's complement of the address (15 to 1) relative to the branch destination
n
address
258
R
R
reg
1
0
0
0
A
0
1
X
1
0
L
1
1
H
reg
0
0
E
0
1
D
1
0
C
1
1
B
Q
Q
addressing
1
0
0
1
@HL
1
0
@HL+
1
1
@HL–
@rpa
0
0
@DE
0
1
@DL
N
N
N
IExxx
2
1
0
0
0
0
IEBT
0
1
0
IEW
1
0
0
IET0
1
0
1
IECSI
1
1
0
IE0
1
1
1
IE2
0
0
0
IE4
1
0
0
IET1
1
1
0
IE1
P
P
P
2
1
0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
reg1
1
0
1
1
1
0
1
1
1
P
P
2
1
0
0
0
1
1
0
1
1
@rpa1
reg-pair
XA
XA'
HL
HL'
rp'
DE
rp'1
DE'
BC
BC'
reg-pair
XA
HL
rp1
DE
rp2
BC
rp
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