8051 Program - exchange r0r1 and dptr

; Description:

; Exchange R0/1 And DPTR

;

; Entry Requirements:

; DPTR Has 1st Value

; R0/1 Has 2nd Value

;

; On Exit:

; DPTR <-> R0/1

;

; Affected:

; DPTR, R0, R1

;

; Stack:

; 1 Bytes, Not Including Space Used By Called Routines

;

; Comments:

; None

UTIL_DPTRR01:
	push acc	; Save Acc
	mov a,dpl	; Get DPL
	mov dpl,r1	; Move R1 To DPL
	mov r1,a	; Move DPL To R1
	mov a,dph	; Get DPL
	mov dph,r0	; Move R0 To DPH
	mov r0,a	; Move DPH To R0
	pop acc	; Recover Acc
	ret	; Return To Caller

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

---

<< Previous :: Up :: Next >>

---

Related topics:
8051 Program - increment 16bit in iram   |   8051 Program - compare dptr to 16bit iram value   |   8051 Program - compare dptr to ba   |   8051 Program - shift a 16 bit iram value 4 bits left   |   8051 Program - load dptr from (dptr) rom   |   8051 Program - load dptr from (dptr) xram   |   8051 Program - store r6r7 to dptr xram   |   8051 Program - exchange r0r1 and dptr   |   8051 Program - exchange r6r7 and dptr   |   8051 Program - memory subroutines   |   8051 Program - math subroutines   |   8051 Program - conversion subroutines

---

List of topics: 8051

---