Microprocessor - 8085 Branching Instructions
The following table shows the list of Branching instructions with their meanings.
| Opcode |
Operand |
Meaning |
Explanation |
| JMP |
16-bit address |
Jump unconditionally |
The program sequence is transferred to the memory address given in the operand. |
| Opcode |
Description |
Flag Status |
| JC |
Jump on Carry |
CY=1 |
| JNC |
Jump on no Carry |
CY=0 |
| JP |
Jump on positive |
S=0 |
| JM |
Jump on minus |
S=1 |
| JZ |
Jump on zero |
Z=1 |
| JNZ |
Jump on no zero |
Z=0 |
| JPE |
Jump on parity even |
P=1 |
| JPO |
Jump on parity odd |
P=0 |
|
16-bit address |
Jump conditionally |
The program sequence is transferred to the memory address given in the operand based on the specified flag of the PSW. |
| Opcode |
Description |
Flag Status |
| CC |
Call on Carry |
CY=1 |
| CNC |
Call on no Carry |
CY=0 |
| CP |
Call on positive |
S=0 |
| CM |
Call on minus |
S=1 |
| CZ |
Call on zero |
Z=1 |
| CNZ |
Call on no zero |
Z=0 |
| CPE |
Call on parity even |
P=1 |
| CPO |
Call on parity odd |
P=0 |
|
16-bit address |
Unconditional subroutine call |
The program sequence is transferred to the memory address given in the operand. Before transferring, the address of the next instruction after CALL is pushed onto the stack. |
| RET |
None |
Return from subroutine unconditionally |
The program sequence is transferred from the subroutine to the calling program. |
| Opcode |
Description |
Flag Status |
| RC |
Return on Carry |
CY=1 |
| RNC |
Return on no Carry |
CY=0 |
| RP |
Return on positive |
S=0 |
| RM |
Return on minus |
S=1 |
| RZ |
Return on zero |
Z=1 |
| RNZ |
Return on no zero |
Z=0 |
| RPE |
Return on parity even |
P=1 |
| RPO |
Return on parity odd |
P=0 |
|
None |
Return from subroutine conditionally |
The program sequence is transferred from the subroutine to the calling program based on the specified flag of the PSW and the program execution begins at the new address. |
| PCHL |
None |
Load the program counter with HL contents |
The contents of registers H & L are copied into the program counter. The contents of H are placed as the high-order byte and the contents of L as the loworder byte. |
| RST |
0-7 |
Restart |
The RST instruction is used as software instructions in a program to transfer the program execution to one of the following eight locations.
| Instruction |
Restart Address |
| RST 0 |
0000H |
| RST 1 |
0008H |
| RST 2 |
0010H |
| RST 3 |
0018H |
| RST 4 |
0020H |
| RST 5 |
0028H |
| RST 6 |
0030H |
| RST 7 |
0038H |
| Interrupt |
Restart Address |
| TRAP |
0024H |
| RST 5.5 |
002CH |
| RST 6.5 |
0034H |
| RST 7.5 |
003CH |
|
microprocessor_8085_instruction_sets.htm
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