ZiLOG Z8 - Page 211

Z8 Microcontrollers
ZiLOG Instruction Descriptions and Formats
UM001601-0803 12-71
SUB
SUBTRACT
Example:
If Working Register R15 contains 16H, Working Register R10 contains 20H, and Register 20H contains 11H, the
statement:
SUB R16, @R10
Op Code: 23 FA
leaves the value 05H in Working Register R15. The D Flag is set, and the C, Z, S, V, and H Flags are cleared.
Example:
If Register 34H contains 2EH, and Register 12H contains 1BH, the statement:
SUB 34H, 12H
Op Code: 24 12 34
leaves the value 13H in Register 34H. The D Flag is set, and the C, Z, S, V, and H Flags are cleared.
Example:
If Register 4BH contains 82H, Working Register R3 contains 10H, and Register 10H contains 01H, the statement:
SUB 4BH, @R3
Op Code: 25 E3 4B
leaves the value 81H in Register 4BH. The D Flag is set, and the C, Z, S, V, and H Flags are cleared.
Example:
If Register 6CH contains 2AH, the statement:
SUB 6CH, #03H
Op Code: 26 6C 03
leaves the value 27H in Register 6CH. The D Flag is set, and the C, Z, S, V, and H Flags are cleared.
Example:
If Register D4H contains 5FH, Register 5FH contains 4CH, the statement:
SUB @D4H, #02H
Op Code: 17 D4 02
leaves the value 4AH in Register 5FH. The D Flag is set, and the C, Z, S, V, and H Flags are cleared.