8051 Program - exchange r6r7 and dptr

; Description:

; Exchange R6/7 And DPTR

;

; Entry Requirements:

; DPTR Has 1st Value

; R6/7 Has 2nd Value

;

; On Exit:

; DPTR <-> R6/7

;

; Affected:

; DPTR, R6, R7

;

; Stack:

; 1 Bytes, Not Including Space Used By Called Routines

;

; Comments:

; None

UTIL_DPTRR67:
	push acc	; Save Acc
	mov a,dpl	; Get DPL
	mov dpl,r7	; Move R7 To DPL
	mov r7,a	; Move DPL To R7
	mov a,dph	; Get DPL
	mov dph,r6	; Move R6 To DPH
	mov r6,a	; Move DPH To R6
	pop acc	; Recover Acc
	ret	; Return To Caller

Source: Assorted Utilities, John C. Wren 11/23/96

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List of topics: 8051

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