SD6830 datasheet(23/34 Pages) AUK

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KSI-W002-000

CLRB K

Binary code

: 00101110

Syntax

: [<label>] CLRB K

Operation

: (K) ← 0

Flags

: CY: Unaffected

SF: Unaffected

Words/Cycles

1/1

Description

: Clears the port K to zero.

Example

: CLRB K

; Clear K to zero.

IF0 @HL.b

Binary code

: 000001xx

Syntax

: [<label>] IF0 @HL.b

Operation

: M[(HL)b] = 0

Flags

: CY: Unaffected

SF: Set to one if equal, cleared otherwise

Words/Cycles

1/1

Description

: Compares the specified bit of data memory addressed by registers H

and L with zero.

Example

: SETB H

;

Set H to one

LDL

;

Load 4 to L

IF0 @HL.3 ; Compare the bit 3 of M[(14)] with zero

JMP

020

; Jump to 020 if not equal

JMP

030

; Jump to 030 if equal

IF0 CY

Binary code

00011100

Syntax

[<label>] IF0 CY

Operation

(CY) = 0

Flags

CY : Unaffected

SF : Set to one if equal, cleared otherwise

Words/Cycles

1/1

Description

Compares the carry flag with zero.

Example

IF0 CY

;

Compare the content of CY to zero

JMP 030

;

Jump to 030 if not equal

JMP 040

;

Jump to 040 if equal

SD6830

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