boot.a51

来自「税控收款机源码:拼音输入法,LCD,VFD驱动,IC卡驱动,税控国标」· A51 代码 · 共 35 行

PageReg		equ 80e0h
VmReg		equ 80e2h
 

                cseg at 0ff00h
		org  0ff00h

                mov dptr,#PageReg
                mov a,#0;
                movx @dptr,a

		 
                mov dptr,#VmReg
                movx a,@dptr
		mov a,#04h		;Code can access main, Data can access Boot 
		movx @dptr,a      	;jump to main application
                
                ljmp 0000h


 		org  0ff80h

                mov dptr ,#PageReg
                mov a,#008h;
                movx @dptr,a

                mov dptr,#VmReg
                movx a,@dptr
		mov a,#12h		;Code can access Boot , Data can access Main
		movx @dptr,a            ;jump to boot application
                
                ljmp 8000h
                
                end