NEC PD754144 - Manual (Page 248)

CHAPTER 11 INSTRUCTION SET
248 User’s Manual U10676EJ3V0UM
11.3 Opcode of Each Instruction
(1) Description of symbol of opcode
R 2 R 1 R 0 reg
0 0 0 A
0 0 1 X
0 1 0 L
0 1 1 H
1 0 0 E
1 0 1 D
1 1 0 C
1 1 1 B
reg reg1
P
2
P
1
P
0
reg-pair
0 0 0 XA
0 0 1 XA'
0 1 0 HL
0 1 1 HL'
1 0 0 DE
1 0 1 DE'
1 1 0 BC
1 1 1 BC'
rp' rp'1
Q 2 Q 1 Q 0 addressing
0 0 0 @HL
0 1 0 @HL+
0 1 1 @HL–
1 0 0 @DE
1 0 1 @DL
P 2 P 1 reg-pair
0 0 XA
0 1 HL
1 0 DE
1 1 BC
rp2
rp1
rp
N
5
N
2
N
1
N
0
IE ×××
0 0 0 0 IEBT
0 1 0 0 IET0
0 1 1 0 IE0
0 1 1 1 IE2
1 0 0 1 IEEE
1 1 0 0 IET1
1 1 0 1 IET2
@rpa
@rpa1
I n : Immediate data for n4 or n8
D n : Immediate data for mem
B n : Immediate data for bit
N n : Immediate data for n or IE
×××
T
n
: Immediate data for taddr × 1/2
A
n
: Immediate data for [relative address distance from branch destination address (2-16)] – 1
S n : Immediate data for 1’s complement of [relative address distance from branch destination address (15-1)]