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
|
Published on 27-Dec-2018 17:24:56
