To Next Page

To Previous Page

CPU

User Manual

UM001604-0108 Instruction Description

208

Example 1

If Working Register R1 contains 34h (00111000b) and Working Register R14 contains

4Dh (10001101), the statement:

OR R1, R14

Op Code: 42 1E

leaves the value BDh (10111101b) in Working Register R1. The S Flag is set, and the Z

and V Flags are cleared.

Example 2

If Working Register R4 contains F9h (11111001b), Working Register R13 contains 7Bh,

and Register 7B contains

6Ah (01101010b), the statement:

OR R4, @R13

Op Code: 43 4D

leaves the value FBh (11111011b) in Working Register R4. The S Flag is set, and the Z

and V Flags are cleared.

Example 3

If Register 3Ah contains the value F5h (11110101b) and Register 42h contains the value

0Ah (00001010), the statement:

OR 3Ah, 42h

Op Code: 44 42 3A

leaves the value FFh (11111111b) in Register 3Ah. The S Flag is set, and the Z and V

Flags are cleared.

Example 4

If Working Register R5 contains 70h (01110000b), Register 45h contains 3Ah, and Reg-

ister

3Ah contains 7Fh (01111111b), the statement:

OR R5, @45h

Op Code: 45 45 E5

leaves the value 7Fh (01111111b) in Working Register R5. The Z, V, and S Flags are

cleared.

Example 5

If Register 7Ah contains the value F3h (11110111b), the statement:

OR 7Ah, #F0h

Op Code: 46 7A F0

leaves the value F3h (11110111b) in Register 7Ah. The S Flag is set, and the Z and V

Flags are cleared.

ZiLOG Z8 Series User Manual

Questions and Answers: