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second stage bootloader

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fgets
Butterfly
Butterfly

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19 Nov 2014, 6:25 pm

The problem is that it won't print a message using (int 10h: ah, 0x0E) bios interrupts in the
second stage or the second sector. Can you print a message in the second stage boot file?

Quote:
operating system: ubuntu 14.04 LTS
emulator: qemu
processor: intel
processor size: 64-bit


Then again, how do you handle both the first and second stage boot files?



MaryXYX
Tufted Titmouse
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09 Dec 2014, 7:39 am

That ought to work, but the last time I was fiddling with boot loaders it was on floppies. Does it matter that it's going to load Ubuntu? At boot loader time it hasn't got that far.



fgets
Butterfly
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11 Dec 2014, 9:33 am

No, not ubuntu. Well, my question is that it didn't print a message with stosb string instruction? So, then the idea is to use geek loading or cram the data structures into the 512-byte boot stage.



MaryXYX
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11 Dec 2014, 7:04 pm

If it's a hard disk boot loader it should be possible to use more than one sector. I think the BIOS switches the graphics into a simple text mode, so the text INTs should work.