Zilog Z86193 Bedienungsanleitung PDF herunterladen (Seite 245)

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

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

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Zilog Z86193 Bedienungsanleitung Seite 245