我编写了一个基于以下内容的简单引导加载程序:http://www.viralpatel.net/taj/tutorial/hello_world_bootloader.php
它应该只在屏幕上显示“Booting ...”,但它也会显示我定义的每条消息(“Booting ... Remove disk and press enter for reboot ...”)。我该如何解决?
这是我的代码:
[BITS 16]
[ORG 0x7C00]
xor ax,ax
mov ds,ax
mov si, msg_boot
call printline
loop:
jmp loop
reboot:
mov si, msg_remove_disk
call printline
call .inputcheck
ret
.inputcheck:
call input
cmp al, 13
je .end
jmp .inputcheck
.end:
call reset
ret
reset:
db 0Eah
dw 0000h
dw 0FFFFh
ret
exit:
ret
print:
mov al, [si]
inc si
or al, al
jz exit
mov ah, 0x0E
int 0x10
jmp print
printline:
call print
mov al, endofline
call print
ret
input:
mov ah, 0
int 16h
ret
msg_boot db 'Booting...', 0
msg_remove_disk db 'Remove disk and press enter for reboot...', 0
endofline db 13, 10, 0
TIMES 510 - ($ - $$) db 0
DW 0xAA55
答案 0 :(得分:1)
mov al,endofline 应该 mov si,endofline
谢谢@Frank Kotler