王爽《汇编语言》课程设计二
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
先运行代码1，再运行代码2，要利用虚拟机代码1
assume cs:code
code segment
NewStart1: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",0
NewStart2:mov bx,200h
mov ds,bx
mov bx,0b800h
mov es,bx
mov si,2
mov bp,160*10+30*2
mov cx,4
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 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
retf
setclock:jmp short setclock1
b db 'aaaaaaaaaaaaaa' setclock1:
push ax
push si
push ds
push dx
mov ax,200h
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 si,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,bx
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
ret
cls:push es
push bx
push cx
mov bx,0b800h
mov es,bx
mov bx,0
mov cx,2000
s10:mov byte ptr es:[bx],' '
add bx,2
loop s10
pop cx
pop bx
pop es
ret