王爽《汇编语言》课程设计二.docx

1、王爽汇编语言课程设计二先运行代码1，再运行代码2，要利用虚拟机代码1assume cs:codecode segmentNewStart1:jmp short NewStart2 db 1) reset pc ,0 db 2) start system ,0 db 3) clock ,0 db 4) set clock ,0 s5 dw 8 dup (0) s6 db aaaa/aa/aa aa:aa:aa,0NewStart2:mov bx,200h mov ds,bx mov bx,0b800h mov es,bx mov si,2 mov bp,160*10+30*2 mov cx,4

2、show:push cx mov di,0 mov cx,16 show1:mov al,ds:si mov es:bp+di,al add di,2 inc si loop show1 pop cx add bp,158 loop show mov bx,66 mov word ptr ds:bx,0 mov word ptr ds:bx+2,0ffffh ccc:mov ah,0 int 16h cmp al,1 je reset cmp al,2 je startsystem cmp al,3 je clock cmp al,4 je setclock jmp ccc reset:mov

3、 bx,200h mov ds,bx mov bx,66 jmp dword ptr ds:bx startsystem:mov bx,0 mov es,bx mov bx,7c00h mov dl,80h mov dh,0 mov ch,0 mov cl,1 mov al,1 mov ah,2 int 13h mov bx,0 push bx mov bx,7c00h push bx retfsetclock:jmp short setclock1 b db aaaaaaaaaaaaaasetclock1: push ax push si push ds push dx mov ax,200

4、h mov ds,ax mov si,offset b mov dx,0 call getstr call str pop dx pop ds pop si pop ax call cls jmp near ptr NewStart1 clock:call cls mov bx,200h mov ds,bx mov bx,0 mov es,bx mov bx,66 push es:9*4 pop ds:bx+10 push es:9*4+2 pop ds:bx+12 cli mov word ptr es:9*4,offset int9 mov es:9*4+2,ds sti s4:mov s

5、i,offset s6 mov al,32h call s mov si,ah mov si+1,al add si,2 mov al,9 mov cx,3 s1:mov bl,al call s mov si,ah mov si+1,al add si,3 mov al,bl dec al loop s1 mov si,offset s6 add si,11 mov al,4 mov cx,3 s2:mov bl,al call s mov si,ah mov si+1,al add si,3 mov al,bl sub al,2 loop s2 mov bx,0b800h mov es,b

6、x mov si,offset s6 mov di,160*6+40*2 mov cx,19 s3:mov bl,si mov es:di,bl inc si add di,2 loop s3 jmp short s4 s:push cx out 70h,al in al,71h mov ah,al mov cl,4 shr ah,cl and al,00001111b add ah,30h add al,30h pop cx retcls:push es push bx push cx mov bx,0b800h mov es,bx mov bx,0 mov cx,2000 s10:mov

7、byte ptr es:bx, add bx,2 loop s10 pop cx pop bx pop es retint9:push ax push bx push es push cx mov bx,200h mov ds,bx mov ax,0b800h mov es,ax mov bx,66 in al,60h pushf call dword ptr ds:bx+10 cmp al,3bh jne ok1 mov bx,160*6+40*2+1 mov cx,19 s7:inc byte ptr es:bx add bx,2 loop s7 ok2:pop cx pop es pop

8、 bx pop ax iret ok1:cmp al,01 jne ok2 mov ax,0 mov es,ax mov bx,66 cli push ds:bx+10 pop es:9*4 push ds:bx+12 pop es:9*4+2 sti pop cx pop es pop bx pop ax mov bp,0b800h mov es,bp mov bx,160*6+40*2 mov cx,19 s8:mov byte ptr es:bx, add bx,2 loop s8 mov ax,200h push ax mov ax,0 push ax retf charstack:j

9、mp short charstart table dw charpush,charpop,charshow charstart:push bx push di push es cmp ah,2 ja sret mov bl,ah mov bh,0 add bx,bx jmp word ptr tablebx charpush:mov bx,dx mov sibx,al inc dx jmp sret charpop:cmp dx,0 je sret dec dx mov bx,dx mov al,sibx jmp sret charshow:mov bx,0b800h mov es,bx mo

10、v di,160*6+40*2 mov bx,0 charshows:cmp bx,dx jne noempty mov byte ptr es:di, jmp sret noempty:mov al,sibx mov es:di,al mov byte ptr es:di+2, inc bx add di,2 jmp charshows sret:pop es pop di pop bx ret getstr:push ax getstrs:mov ah,0 int 16h cmp al,20h jb nochar mov ah,0 call charstack mov ah,2 call

11、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 wrtc:push cx out 70h,al mov ah,bbx sub ah,30h mov cl,4 shl ah,cl inc bx

12、 mov al,bbx sub al,30h or al,ah out 71h,al inc bx pop cx ret str:push ax push bx mov bx,0 mov al,32h call wrtc mov al,9 call wrtc mov al,8 call wrtc mov al,7 call wrtc mov al,4 call wrtc mov al,2 call wrtc mov al,0 call wrtc pop bx pop ax ret start:push cs pop es mov bx,offset NewStart1 mov al,16 mo

13、v ch,0 mov cl,2 mov dl,0 mov dh,0 mov ah,3 int 13h mov ax,4c00h int 21hcode endsend start代码2assume cs:codecode segment NewStart1:jmp short NewStart2 dw 0,0NewStart2:mov bx,200h mov es,bx mov bx,0 mov al,16 mov ch,0 mov cl,2 mov dl,0 mov dh,0 mov ah,2 int 13h mov ax,0 mov es,ax mov word ptr es:7c04h,200h jmp dword ptr es:7c02h start:push cs pop es mov bx,offset NewStart1 mov al,1 mov ch,0 mov cl,1 mov dl,0 mov dh,0 mov ah,3 int 13h mov ax,4c00h int 21hcode endsend start