Question

汇编语言程序设计题：1.试编程统计由4000H开始的16K个单元中存放字符“A”的个数，并将结果存放在dx中

那位大虾帮帮忙啊，小弟感激不尽!

Answer 1

data segment
data ends
code segment
assume cs:code,ds:data
start:
mov ax,data
mov ds,ax
mov cx,4000h
mov dx,0
mov si,0
mov bx,4000h
again:
mov al,[bx+si]
cmp al,41h
jnz next
inc dx
next:
inc si
loop again
mov ah,4ch
int 21h
code ends
end start
;finish!