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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: 27-Jun-2020
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