spcpy.asm

MCS-51的一个小型操作系统,在KeilC中大模式下编译工作

?PR?_spcopy?SPCOPY   SEGMENT CODE 
?DT?_spcopy?SPCOPY   SEGMENT DATA OVERLAYABLE 
	PUBLIC	_spcopy

	RSEG  ?DT?_spcopy?SPCOPY
?_spcopy?BYTE:
          d?040:   DS   1
	ORG  1
          s?041:   DS   1
	ORG  2
        len?042:   DS   1
	ORG  3
          i?043:   DS   1
; 
; 
; #include "os.h"
; void spcopy(uchar data *d,uchar data *s,uchar len)

	RSEG  ?PR?_spcopy?SPCOPY
_spcopy:
			; SOURCE LINE # 4
	 USING   0
	 PUSH    AR0
	 PUSH    AR1
	 MOV  	 R1,AR7
	 MOV  	 R0,AR5
LOOP:MOV     A,@R0
	 MOV     @R1,A
	 INC     R0
	 INC     R1
	 DJNZ    R3,LOOP
	 POP     AR1
	 POP     AR0

; {
			; SOURCE LINE # 5
;  uchar i;
; }			; SOURCE LINE # 7
	RET  	
; END OF _spcopy

	END