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#2
zaixuexi2012-01-05 13:29
 程序代码：stack segment db 256 dup(?) ;uint16_t task_stack[128]; stack ends code segment move_face proc far assume cs:code,ss:stack start: push ds sub ax,ax push ax mov ah,15 int 10h ;uint8_t mode = get_videomode();/*pseudo-code*/ mov ah,0 mov al,1 int 10h ;set_videomode(MODE1);#define MODE1 (1)/*pseudo-code*/ mov cx,1 mov dx,0 ;uint8_t row = 0; uint8_t col = 0; sti ;enable_interrupt(); move_cursor: mov ah,2 int 10h ;set_cursor(row, col); mov al,1 mov ah,10 ;putchar(0x01); int 10h call delay ;delay(); sub al,al mov ah,10 int 10h ;putchar(0x00); inc dh inc dl ;row++;col++; cmp dh,25h jne move_cursor ;if (row != 0x25) goto move_cursor; ret move_face endp delay proc push bx push cx push dx mov ah,0 int 1ah ;uint32_t _t = getsystick(); add dx,9 mov bx,dx ;uint16_t low_t = LODWORD(_t) + 9; redo: int 1ah ;_t = getsystick(); cmp dx,bx jne redo ;if (low_t != LODWORD(_t)) goto redo; pop dx pop cx pop bx ret delay endp code ends end start  |
总是会出现未定义的错误
stack segment
db 256 dup(?)
stack ends
code segment
move_face proc far
assume cs:code,ss:stack
start: push ds
sub ax,ax
push ax
mov ah,15
int 10h
mov ah,0
mov al,1
int 10h
mov cx,1
mov dx,0
sti
move_cursor: mov ah,2
int 10h
mov al,1
mov ah,10
int 10h
call delay
sub al,al
mov ah,10
int 10h
inc dh
inc dl
cmp dh,25h
jne move_cursor
ret
move_face endp
delay proc
push bx
push cx
push dx
mov ah,0
int 1ah
add dx,9
mov bx,dx
redo: int 1ah
cmp dx,bx
jne redo
pop dx
pop cx
pop bx
ret
delay endp
code ends
end start