汇编学习（十二）8086汇编拾遗 (11)-蒲公英云

汇编学习（十二）8086汇编拾遗 (11)

灰太狼 2022-08-23 00:39 294阅读 0赞

《汇编语言》最后一章，键盘和磁盘的读取
一个键盘读写程序：
assume cs:code code segment charstack: jmp short charstart ;字符串及栈处理 table dw charpush,charpop,charshow top dw 0 charstart: push bx push dx push di push es cmp ah,2 ;功能大与2直接返回 ja sret mov bl,ah mov bh,0 add bx,bx jmp word ptr table[bx] ;跳转字符串功能选择函数 charpush: mov bx,top mov [si][bx],al ;按照top 的位置入栈 inc top jmp sret charpop: cmp top,0 ;判段是否为空 je sret dec top ;弹栈元素 mov bx,top mov al,[si][bx] jmp sret charshow: ;展示字符串，设置行列 mov bx,0b800h mov es,bx mov al,160 mov ah,0 mul dh ;dh 保存行数 mov di,ax ;设置列数 add dl,dl mov dh,0 add di,dx mov bx,0 charshows: cmp bx,top jne noempty mov byte ptr es:[di],' ' jmp sret noempty: mov al,[si][bx] mov es:[di],al mov byte ptr es:[di+2],' ' inc bx add di,2 jmp charshows sret: pop es pop di pop dx pop bx ret start: getstr: push ax getstrs: mov ah,0 int 16h cmp al,20h jb nochar mov ah,0 call charstack mov ah,2 call charstack jmp getstrs nochar: cmp ah,0eh je backspace cmp ah,1ch je enter jmp getstrs backspace: mov ah,1 call charstack mov ah,2 call charstack jmp getstrs enter: mov al,0 mov ah,0 call charstack mov ah,2 call charstack pop ax ret code ends end start