Intel mcs-48 manual MOVP3 A,@A Move Page 3 Data to Accumulator Not in 8021,8022

INSTRUCTION SET

Example: MOV128: MOV A,#128 ;MOVE '128'DEC TO ACC

MOVPA,@A ;CONTENTS OF 129th LOCATION

;IN CURRENT PAGE ARE MOVED TO

;ACC

MOVP3 A,@A Move Page 3 Data to Accumulator (Not in 8021,8022)

11110100111

This is a 2-cycle instruction. The contents of the program memory location (within page 3) addressed by the accumulator are moved to the accumulator. The program counter is restored following this operation.

(PCo-7)+(A) (PCS_11)+0011 (A)+«PC))

Example: Look up ASCII equivalent of hexadecimal code in table contained at the beginning of page 3. Note that ASCII characters are designated by a 7-bit code; the eighth bit is always reset.

TABSCH: MOV A,#OB8H ;MOVE 'B8'HEX TO ACC (10111000) ANL A,#7FH ;LOGICAL AND ACC TO MASK BIT

;7 (00111000)

MOVP3 A,@A ;MOVE CONTENTS OF LOCATION ;'38'HEX IN PAGE 3 TO ACC ;(ASCII '8')

Access contents of location in page 3 labelled TAB1. Assume current program location is not in page 3.

TABSCH: MOV A,#LOW TAB1 ;ISOLATE BITS 0-7 OF LABEL ;ADDRESS VALUE

MOVP3 A,@A ;MOVE CONTENTS OF PAGE 3 ;LOCATION LABELED 'TAB1' ;TO ACC

MOVX A,@Rr Move External-Data-Memory Contents to Accumulator

11 000 I000 r I (Not in 8021, 8022)

This is a 2-cycle instruction. The contents of the external data memory location addressed by register 'r'are moved to the accumulator. Register 'r'contents are unaffected.

(A)..- «Rr))r=0-1

Example: Assume R1 contains 01110110.

MAXDM: MOVX A,@R1	;MOVE CONTENTS OF LOCATION
	;118 TO ACC

Mnemonics copyright Intel Corporation 1976.

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