Instruction Codes; Description Of Instruction Code Table - NEC 78K/0 Series User Manual

4.2 Instruction Codes

4.2.1 Description of instruction code table

r
R R R
2 1
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
Bn:
Data:
Low/High byte: 16-bit immediate data corresponding to word
Saddr-offset:
Sfr-offset:
Low/High addr: 16-bit immediate data corresponding to addr16
jdisp:
fa to fa :
10 0
ta to ta :
4 0
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CHAPTER 4 INSTRUCTION SET
rp
reg P
0
0 R0 X
1 R1 A
0 R2 C
1 R3 B
0 R4 E
1 R5 D
0 R6 L
1 R7 H
Immediate data corresponding to bit
8-bit immediate data corresponding to byte
16-bit address lower 8-bit offset data corresponding to saddr
sfr 16-bit address lower 8-bit offset data
Signed two's complement data (8 bits) of relative address distance between the start
and branch addresses of the next instruction
11 bits of immediate data corresponding to addr11
5 bits of immediate data corresponding to addr5
User's Manual U12326EJ4V0UM
P reg-pair
1 0
0 0 RP0 AX
0 1 RP1 BC
1 0 RP2 DE
1 1 RP3 HL
RB
RB RB reg-bank
1 0
0 0 RB0
0 1 RB1
1 0 RB2
1 1 RB3