Zilog Z86193 Uživatelský manuál stáhnout pdf (Strana 253)

CPU

User Manual

UM001604-0108 Instruction Description

246

Example 1

If Working Register R3 contains 45h (01000101b) and Working Register R7 contains the

value

02h (00000010b) (bit 1 is being tested if it is 0), the statement:

TM R3, R7

Op Code: 72 37

sets the Z Flag indicating bit 1 in the destination operand is 0. The V and S Flags are

cleared.

Example 2

Working Register R14 contains the value F3h (11110011b), Working Register R5 con-

tains

CBh, and Register CBh contains 88h (10001000b) (bit 7 a bit 3 are being tested if

they are 0), the statement:

TM R14, @R5

Op Code: 73 E5

resets the Z Flag, because bit 7 in the destination operand is not a 0. The S Flag is set, and

the V Flag is cleared.

Example 3

If Register D4h contains the value 08h (00001000b), and Working Register R0 contains

the value

04h (00000100b) (bit 2 is being tested if it is 0), the statement:

TM D4h, R0

Op Code: 74 E0 D4

sets the Z Flag, because bit 2 in the destination operand is a 0. The S and V Flags is

cleared.

Example 4

If Register DFh contains the value ← (00000000b), Register 07h contains the value 1Fh,

and Register

1Fh contains the value BDh (10111101b) (bit 7, bit 5, bit 4, bit 3, bit 2, and

bit 0 are being tested if they are 0), the statement:

TM DFh, @07h

Op Code: 75 07 DF

sets the Z Flag indicating the tested bits in the destination operand are 0. The S is set, and

the V Flag is cleared.

Example 5

If Working Register R13 contains the value F1h (11110001b), the statement:

TM R13, #02h

Op Code: 76 ED, 02

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Zilog Z86193 Uživatelský manuál Strana 253