bios开发 c语言,如何编写bios
调试已通过，100个数据太长了吧，我这就给出30个成绩记录
data segment
credit dw 76,69,84,90,73,88,99,63,100,80,45,64,24,36,51,20,19,86,89,90,76,69,84,90,73,88,99,63,100,80
mes1 db '<60:$'
mes2 db '60-85:$'
mes3 db '>85:$'
v1 dw 0
v2 dw 0
v3 dw 0
data ends
code segment
assume cs:code,ds:data
main proc far
start:
mov ax,data
mov ds,ax
call count ;统计各分段人数的子程序
mov ah,4ch
int 21h
ret
main endp
;------------------------------
count proc near
lea si,credit
mov cx,30
m1:mov bx,[si]
add si,2
cmp bx,60
jg m2
inc v1
jmp m4
m2:cmp bx,85
jg m3
inc v2
jmp m4
m3:inc v3
m4:loop m1
mov dx,offset mes1
mov ah,09h
int 21h
mov bx,v1
call bini
call crlf
mov dx,offset mes2
mov ah,09h
int 21h
mov bx,v2
call bini
call crlf
mov dx,offset mes3
mov ah,09h
int 21h
mov bx,v3
call bini
ret
count endp
;-----------------------------
bini proc near
mov cx,10d
call bin
mov cx,1d
call bin
ret
bini endp
bin proc near
mov ax,bx
mov dx,0
div cx
mov bx,dx
mov dl,al
add dl,30h
mov ah,02h
int 21h
ret
bin endp
;-------------------------------
crlf proc near ;回车换行子程序
mov dl,0ah
mov ah,02h
int 21h
mov dl,0dh
mov ah,02h
int 21h
ret
crlf endp
;-------------------------------
code ends
end start
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