MCS-51單片機實用子程序庫
;片內RAM初始化子程序
IBCLR: MOV A,R0
MOV R1,A
CLR A
IBC1 : MOV @R1,A
INC R1
DJNZ R7,IBC1
RET
;片外RAM初始化子程序
EBCLR1: MOV A,ADDPL
MOV DPL,A
MOV A,ADDPH
MOV DPH,A
CLR C
EBC11: MOVX @DPTR,A
INC DPTR
DJNZ R7,EBC11
RET
;片外RAM初始化子程序(雙字節個單元)
EBCLR2: MOV A,ADDPL
MOV DPL,A
MOV A,ADDPH
MOV DPH,A
MOV A,R7
JZ EBC21
INC R6
EBC21: CLR A
MOVX @DPTR,A
INC DPTR
DJNZ R7,EBC21
DJNZ R6,EBC21
RET
;內部RAM數據復制程序
;入口: R0,R7
;占用資源: A
;堆棧需求: 2字節
