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主题 : : 实验14，使用21h中断的9号功能显示 [待解决] |
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注册日期：2021-04-11 18:30 |
assume cs:code,ds:data
data segment
year db 2 dup(0)
db '/'
mon db 2 dup(0)
db '/'
day db 2 dup(0)
db '-'
hour dw 0
db ':'
min dw 0
db ':'
sec dw 0
db '$'
data ends
stacksg segment stack
db 16 dup(0)
stacksg ends
code segment
split_al_bcd2ascii: ;ah=十位，al为个位
push cx
mov ah,al
mov cl,4
shr ah,cl
and al,00001111b
add al,30h
add ah,30h
pop cx
ret
start:
mov ax,data
mov ds,ax
mov ax,stacksg
mov ss,ax
mov sp,16
mov al,9 ;year
out 70h,al
in al,71h
call split_al_bcd2ascii
mov ds:[0],ah
mov ds:[1],al
mov al,8 ;month
out 70h,al
in al,71h
call split_al_bcd2ascii
mov ds:[3],ah
mov ds:[4],al
mov al,7 ;day
out 70h,al
in al,71h
call split_al_bcd2ascii
mov ds:[6],ah
mov ds:[7],al
mov al,4 ;hour
out 70h,al
in al,71h
call split_al_bcd2ascii
mov ds:[9],ah
mov ds:[10],al
mov al,2 ;minute
out 70h,al
in al,71h
call split_al_bcd2ascii
mov ds:[12],ah
mov ds:[13],al
mov al,0 ;second
out 70h,al
in al,71h
call split_al_bcd2ascii
mov ds:[15],ah
mov ds:[16],al
mov dx,0 ;显示数据段字符串
mov ah,9
int 21h
mov ah,4ch
int 21h
code ends
end start | | |
