Loading... <!-- wp:paragraph --> <p>今天看完了int指令和端口，由于这些知识和32位的有一定区别，所以知识点就不列了，我也只是粗略的看了一下，做了一下实验而已</p> <!-- /wp:paragraph --> <!-- wp:paragraph --> <p>实验13</p> <!-- /wp:paragraph --> <!-- wp:code --> <pre class="wp-block-code"><code>assume cs:code,ds:data data segment db 'welcome to masm!',0 data ends stack segment dd 8 dup(0) stack ends code segment main: ;---------------------------------setup inter7ch--------------------------------- mov ax,0 mov es,ax mov ax,cs mov ds,ax mov cx,offset end_of_inter7ch-inter7ch mov si,offset inter7ch mov di,200h cld rep movsb ;set err vector mov ax,0 mov es,ax mov es:[7ch*4+0],word ptr 200h mov es:[7ch*4+2],word ptr 0h ;---------------------------------setup inter7ch--------------------------------- mov dh,10 mov dl,10 mov cl,2 mov ax,data mov ds,ax mov ax,stack mov ss,ax mov sp,32 mov si,0 int 7ch mov ax,4c00h int 21h inter7ch: push ax push bx push di ;------------------------------clear the screen------------------------------ push cx push bx mov bx,0b800h mov es,bx mov bx,0 mov cx,2000 s_clear: mov word ptr es:[bx],0 add bx,2 loop s_clear pop bx pop cx ;------------------------------clear the screen------------------------------ ;--------------------------dispaly error information------------------------- mov ax,0b800h mov es,ax mov ax,160 mul dh add al,dl adc ah,0 add al,dl adc ah,0 mov di,ax mov ah,cl mov ch,0 mov cl,ds:[si] s0_inter7ch: jcxz end_loop_inter7ch mov al,ds:[si] mov es:[di].0,al mov es:[di].1,ah inc si add di,2 mov cl,al jmp short s0_inter7ch end_loop_inter7ch: pop di pop bx pop ax iret end_of_inter7ch:nop code ends end main</code></pre> <!-- /wp:code --> <!-- wp:paragraph --> <p>实验14</p> <!-- /wp:paragraph --> <!-- wp:code --> <pre class="wp-block-code"><code>assume cs:code code segment main: ;------------------------------clear the screen------------------------------ mov bx,0b800h mov es,bx mov bx,0 mov cx,2000 s_clear: mov word ptr es:[bx],0 add bx,2 loop s_clear ;------------------------------clear the screen------------------------------ loop_main: mov ax,0b800h mov es,ax mov di,0 ;year mov al,9 mov dx,070h;input from CMOS out dx,al mov dx,071h;input from CMOS in al,dx mov ah,al and ah,11110000b mov cl,4 shr ah,cl and al,00001111b add ah,48 add al,48 mov dx,2 mov es:[di].0,ah mov es:[di].1,dx add di,2 mov es:[di].0,al mov es:[di].1,dx add di,2 mov al,'/' mov es:[di].0,al mov ah,00000111b mov es:[di].1,ah add di,2 ;month mov al,8 mov dx,070h;input from CMOS out dx,al mov dx,071h;input from CMOS in al,dx mov ah,al and ah,11110000b mov cl,4 shr ah,cl and al,00001111b add ah,48 add al,48 mov dx,2 mov es:[di].0,ah mov es:[di].1,dx add di,2 mov es:[di].0,al mov es:[di].1,dx add di,2 mov al,'/' mov es:[di].0,al mov ah,00000111b mov es:[di].1,ah add di,2 ;day mov al,7 mov dx,070h;input from CMOS out dx,al mov dx,071h;input from CMOS in al,dx mov ah,al and ah,11110000b mov cl,4 shr ah,cl and al,00001111b add ah,48 add al,48 mov dx,2 mov es:[di].0,ah mov es:[di].1,dx add di,2 mov es:[di].0,al mov es:[di].1,dx add di,2 mov al,' ' mov es:[di].0,al mov ah,00000111b mov es:[di].1,ah add di,2 ;hour mov al,4 mov dx,070h;input from CMOS out dx,al mov dx,071h;input from CMOS in al,dx mov ah,al and ah,11110000b mov cl,4 shr ah,cl and al,00001111b add ah,48 add al,48 mov dx,2 mov es:[di].0,ah mov es:[di].1,dx add di,2 mov es:[di].0,al mov es:[di].1,dx add di,2 mov al,':' mov es:[di].0,al mov ah,00000111b mov es:[di].1,ah add di,2 ;minutes mov al,2 mov dx,070h;input from CMOS out dx,al mov dx,071h;input from CMOS in al,dx mov ah,al and ah,11110000b mov cl,4 shr ah,cl and al,00001111b add ah,48 add al,48 mov dx,2 mov es:[di].0,ah mov es:[di].1,dx add di,2 mov es:[di].0,al mov es:[di].1,dx add di,2 mov al,':' mov es:[di].0,al mov ah,00000111b mov es:[di].1,ah add di,2 ;second mov al,0 mov dx,070h;input from CMOS out dx,al mov dx,071h;input from CMOS in al,dx mov ah,al and ah,11110000b mov cl,4 shr ah,cl and al,00001111b add ah,48 add al,48 mov dx,2 mov es:[di].0,ah mov es:[di].1,dx add di,2 mov es:[di].0,al mov es:[di].1,dx add di,2 jmp near ptr loop_main ;mov ax,4c00h ;int 21h code ends end main</code></pre> <!-- /wp:code --> 最后修改：2021 年 01 月 02 日 12 : 59 PM © 允许规范转载 赞赏 如果觉得我的文章对你有用,那听听上面我喜欢的歌吧 ×Close 赞赏作者 扫一扫支付 支付宝支付 微信支付
