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问题描述
我一直在研究玩具OS，并一直使用grub作为引导加载程序.最近，当尝试使用VGA时，我发现我无法使用硬件中断.我发现这是因为我被grub误入了保护模式.
I've been working on a toy OS and have been using grub as my boot loader. Recently when trying to use VGA I found that I couldn't use hardware interrupts. This I found was because I had been slung into protected mode by grub.
有人知道如何在不摆脱grub的情况下回到实模式吗?
Does anybody know how to get back into real mode without having to get rid of grub?
推荐答案
您的意思是writeport(value，$ 3c9)?
you mean writeport(value,$3c9)?
>mov 03c9,AH
>out value,AL
或类似intel asm(NASM)
or similar in INTEL asm(NASM)
3c93c8IIRC是VGA寄存器.
3c93c8IIRC are VGA registers.
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