zheng.asm

汇编计数器实例

data segment
source_buffer db 40 dup('a')
data ends
;***********
extra segment
dest_buffer db 40 dup(?)
extra ends
;***********
code segment
main proc far
assume cs:code,ds:data,es:extra
start:
push ds
sub ax,ax
push ax
mov ax,data
mov ds,ax
mov ax,extra
mov es,ax
lea si,source_buffer
lea di,dest_buffer
cld
mov cx,40
rep movsb
ret
main endp
code ends
end start