8085a instruction set summary (cont’d) – Elenco MicroMaster ® Computer Training Kit User Manual
Page 74
8-19
8085A INSTRUCTION SET SUMMARY (Cont’d)
Instruction Code (1)
Mnemonic
Description
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
INCREMENT AND DECREMENT (cont’d)
DCX B
Decrement B & C
0
0
0
0
1
0
1
1
DCX D
Decrement D & E
0
0
0
1
1
0
1
1
DCX H
Decrement H & L
0
0
1
0
1
0
1
1
ADD
ADD r
Add register to A
1
0
0
0
0
S
S
S
ADC r
Add register to A with carry
1
0
0
0
1
S
S
S
ADD M
Add memory to A
1
0
0
0
0
1
1
0
ADC M
Add memory to A with carry
1
0
0
0
1
1
1
0
ADI
Add immediate to A
1
1
0
0
0
1
1
0
ACI
Add immediate to A with carry
1
1
0
0
1
1
1
0
DAD B
Add B & C to H & L
0
0
0
0
1
0
0
1
DAD D
Add D & E to H & L
0
0
0
1
1
0
0
1
DAD H
Add H & L to H & L
0
0
1
0
1
0
0
1
DAD SP
Add stack pointer to H & L
0
0
1
1
1
0
0
1
SUBTRACT
SUB r
Subtract register from A
1
0
0
1
0
S
S
S
SBB r
Subtract register from A with borrow
1
0
0
1
1
S
S
S
SUB M
Subtract memory from A
1
0
0
1
0
1
1
0
SBB M
Subtract memory from A with borrow
1
0
0
1
1
1
1
0
SUI
Subtract immediate from A
1
1
0
1
0
1
1
0
SBI
Subtract immediate from A with borrow
1
1
0
1
1
1
1
0
LOGICAL
ANA r
And register with A
1
0
1
0
0
S
S
S
XRA r
Exclusive OR register with A
1
0
1
0
1
S
S
S
ORA r
OR register with A
1
0
1
1
0
S
S
S
CMP r
Compare register with A
1
0
1
1
1
S
S
S
ANA M
And memory with A
1
0
1
0
0
1
1
0
XRA M
Exclusive OR memory with A
1
0
1
0
1
1
1
0
ORA M
OR memory with A
1
0
1
1
0
1
1
0
CMP M
Compare memory with A
1
0
1
1
1
1
1
0
ANI
And immediate with A
1
1
1
0
0
1
1
0
XRI
Exclusive OR immediate with A
1
1
1
0
1
1
1
0
ORI
OR immediate with A
1
1
1
1
0
1
1
0
CPI
Compare immediate with A
1
1
1
1
1
1
1
0
ROTATE
RLC
Rotate A left
0
0
0
0
0
1
1
1
RRC
Rotate A right
0
0
0
0
1
1
1
1
RAL
Rotate A left through carry
0
0
0
1
0
1
1
1
RAR
Rotate A right through carry
0
0
0
1
1
1
1
1
SPECIALS
CMA
Complement A
0
0
1
0
1
1
1
1
STC
Set carry
0
0
1
1
0
1
1
1
CMC
Complement carry
0
0
1
1
1
1
1
1
DAA
Decimal adjust A
0
0
1
0
0
1
1
1
CONTROL
EI
Enable interrupts
1
1
1
1
1
0
1
1
DI
Disable interrupt
1
1
1
1
0
0
1
1
NOP
No-operation
0
0
0
0
0
0
0
0
HLT
Halt
0
1
1
1
0
1
1
0
NEW 8085A INSTRUCTIONS
RIM
Read Interrupt Mask
0
0
1
0
0
0
0
0
SIM
Set Interrupt Mask
0
0
1
1
0
0
0
0
NOTES: 1 - DDS or SSS B 000, C 001, D 010, E011, H 100, L 101, Memory 110, A 111
2 - Two possible cycle times. (6/12) indicate instruction cycles dependent on condition flags.