打印签到装配 [英] Print sign in assembly

问题描述

我正在开发一个操作系统。我为此在程序集中创建了一个打印功能。当我尝试用这个打印'----'时。这是行不通的。我的代码可以在这个网址上找到：主人的ThunderEagle / printf.asm·Sansoft500 / ThunderEagle·GitHub [ ^ ] < br $> b $ b

请帮我解决



我试过的：



以前显示的网址是唯一但我使用的网址



mov al，' - '

int 10h

int 10h

int 10h



它有效。我如何在我的功能中使用它？



[由Jochen Arndt编辑：从GitHub插入的代码]

I am working on an Operating System. I create a print function in assembly for this. When i try to print '----' with this. it does not work. My code is available on this url: ThunderEagle/printf.asm at master · Sansoft500/ThunderEagle · GitHub[^]

please help me to solve

What I have tried:

The url is shown before is the only but when i use

mov al,'-'
int 10h
int 10h
int 10h

it works. how i use this with my function?

printf:
	mov ah,0x0e
	mov bh,0x00
	mov bl,0x07
	next:
		mov al,[si]
		or al,al
		jz done
		int 0x10
		inc si
		jmp next
	done:
		ret

推荐答案

要使用BIOS中断10h打印字符，首先必须在AH中设置该功能...

To print a character using BIOS interrupt 10h, you first have to set the function in AH...

mov ah, 0x0e
mov al, '-'
int 0x10

如果您希望我们检查您的代码，请将其粘贴到您的代码中问题而不是添加链接...

If you wish us to examine your code, please paste it in to your question instead of adding a link...

来自GitHub网址的代码：

Code from the GitHub URL:

printf:
	mov ah,0x0e
	mov bh,0x00
	mov bl,0x07
	next:
		mov al,[si]
		or al,al
		jz done
		int 0x10
		inc si
		jmp next
	done:
		ret

以上要求 DS：SI 指向空终止字符串。所以你需要这样的东西：

The above requires that DS:SI is pointing to a null terminated string. So you need something like this:

SECTION .data
minus3: db "---", 0

    SECTION .TEXT

; ...
; DS must be .data which it usually is 
    mov si,minus3
    call printf

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