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 Post subject: boot disk hangs
PostPosted: Sun Jul 24, 2005 9:06 am 
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Joined: Wed Jul 20, 2005 4:59 pm
Posts: 7
Only for my own personal educational purposes tried this.
Repeat: For my own personal educational purposes.

Added a winME book disk

This image will not boot - why?
It hangs the PC and only a hard reboot frees my system.

Any idea why it doesn't work?


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 Post subject: Re: boot disk hangs
PostPosted: Mon Jul 25, 2005 4:39 am 
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Joined: Wed Jul 13, 2005 2:03 am
Posts: 3
leegold wrote:
Only for my own personal educational purposes tried this.
Repeat: For my own personal educational purposes.

Added a winME book disk

This image will not boot - why?
It hangs the PC and only a hard reboot frees my system.

Any idea why it doesn't work?


I also had the problem in Gujin.
If my memory does not fail, when the real DOS boots, it assumes there wasn't anything but BIOS before, and so it forces the size of the real-mode RAM to 640 Kbytes (it does not read the result of interrupt 0x12 - probably because some BIOS were buggy).
If you had a TSR loaded around 639 K, like a floppy disk simulator, it is erased by the real DOS but its interrupt vector INT 0x13 will still point in this area: garantied crash.

Etienne.


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 Post subject:
PostPosted: Mon Jul 25, 2005 5:30 pm 
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Joined: Wed Jul 20, 2005 4:59 pm
Posts: 7
Could you simply your explaination - all i gather is that there's a memory screw-up...

ie, Show me a floppy that will work and explain why it works and explain why Win98 boot floppy image will not.

The customiztion documentation dos not address this.

I'm lost...


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