DS80C320-ECD DALLAS [Dallas Semiconductor], DS80C320-ECD Datasheet - Page 86

• Manufacturer Part Number: DS80C320-ECD
• Description: High-Speed Microcontroller User Guide
• Manufacturer: DALLAS [Dallas Semiconductor]

64 BYTE BLOCK MOVE WITH DUAL DATA POINTER
; SH and SL are high and low byte source address.
; DH and DL are high and low byte of destination address.
; DPS is the data pointer select. Reset condition DPTR0.
DPS
MOV
MOV
INC
MOV
MOVE:
; THIS LOOP IS PERFORMED R5 TIMES, IN THIS EXAMPLE 64
MOVX
INC
MOVX
INC
INC
INC
DJNZ
64 BYTE BLOCK MOVE WITHOUT DUAL DATA POINTER
; SH and SL are high and low byte source address.
; DH and DL are high and low byte of destination address.
MOV
MOV
MOV
MOV
MOV
MOV
MOVE:
; THIS LOOP IS PERFORMED R5 TIMES, IN THIS EXAMPLE 64
MOVX
MOV
MOV
MOV
MOV
MOVX
INC
MOV
MOV
MOV
MOV
INC
DJNZ
EQU 86h
R5, #64
DPTR, #DHDL
DPS
DPTR, #SHSL
A, @DPTR
DPS
@DPTR, A
DPTR
DPS
DPTR
R5, MOVE
R5, #64d
DPTR, #SHSL
R1, #SL
R2, #SH
R3, #DL
R4, #DH
A, @DPTR
R1, DPL
R2, DPH
DPL, R3
DPH, R4
@DPTR, A
DPTR
R3, DPL
R4, DPH
DPL, R1
DPH, R2
DPTR
R5, MOVE
; TELL ASSEMBLER ABOUT DPS
; NUMBER OF BYTES TO MOVE
; LOAD DESTINATION ADDRESS
; CHANGE ACTIVE DPTR
; LOAD SOURCE ADDRESS
; READ SOURCE DATA BYTE
; CHANGE DPTR TO DESTINATION
; WRITE DATA TO DESTINATION
; NEXT DESTINATION ADDRESS
; CHANGE DATA POINTER TO SOURCE
; NEXT SOURCE ADDRESS
; FINISHED WITH TABLE?
; NUMBER OF BYTES TO MOVE
; LOAD SOURCE ADDRESS
; SAVE LOW BYTE OF SOURCE
; SAVE HIGH BYTE OF SOURCE
; SAVE LOW BYTE OF DESTINATION
; SAVE HIGH BYTE OF DESTINATION
; READ SOURCE DATA BYTE
; SAVE NEW SOURCE POINTER
;
; LOAD NEW DESTINATION
;
; WRITE DATA TO DESTINATION
; NEXT DESTINATION ADDRESS
; SAVE NEW DESTINATION POINTER
;
; GET NEW SOURCE POINTER
;
; NEXT SOURCE ADDRESS
; FINISHED WITH TABLE?
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High-Speed Microcontroller User’s Guide
# CYCLES
2
3
2
2
2
2
2
3
2
3
3
# CYCLES
2
3
2
2
2
2
2
2
2
2
2
2
3
2
2
2
3
3
2