ZiLOG Z8 Series

Z8
®
CPU
User Manual
UM001604-0108 Instruction Description
238
Example 1
If Working Register R3 contains 16h, the C Flag is set to 1, and Working Register R11
contains
20h, the statement:
SBC R3, R11
Op Code: 32 3B
leaves the value F5h in Working Register R3. The C, S, and D Flags are set, and the Z, V,
and H Flags are all cleared.
Example 2
If Working Register R15 contains 16h, the C Flag is not set, Working Register R10 con-
tains
20h, and Register 20h contains 11h, the statement:
SBC R16, @R10
Op Code: 33 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 3
If Register 34h contains 2Eh, the C Flag is set, and Register 12h contains 1Bh, the state-
ment:
SBC 34h, 12h
Op Code: 34 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 4
If Register 4Bh contains 82h, the C Flag is set, Working Register R3 contains 10h, and
Register
10h contains 01h, the statement:
SBC 4Bh, @R3
Op Code: 35 E3 4B
leaves the value 80h in Register 4Bh. The D Flag is set, and the C, Z, S, V, and H flags are
cleared.
Example 5
If Register 6Ch contains 2Ah, and the C Flag is not set, the statement:
SBC 6Ch, #03h
Op Code: 36 6C 03
Esrcor Edst