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Conditional call instructions in 8085 Microprocessor
In 8085 Instruction set, depending upon one of the flag bit values (excluding AC flag bit), the conditional call instructions will branch to a subroutine. The branch takes place based on the value of Cy flag, Z flag, P flag, or S flag. There is no call instruction based on the value of AC(Auxiliary Carry) flag bit. This is because generally, no one is interested in branching to a subroutine based on this flag bit value. The conditional call instructions are 3 Bytes in length, 1 Byte for the opcode, and another 2 Bytes for the subroutine address i.e.low-order Byte and high-Byte of the address values.
| Mnemonics, Operand |
Opcode(in HEX) |
Bytes |
|---|---|---|
| CC Label |
DC |
3 |
| CM Label |
FC |
3 |
| CNC Label |
D4 |
3 |
| CNZ Label |
C4 |
3 |
| CP Label |
F4 |
3 |
| CPE Label |
EC |
3 |
| CPO Label |
E4 |
3 |
| CZ Label |
CC |
3 |
Updated on: 2020-06-27T14:27:41+05:30
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