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Re:My FAT12 Bootsector FINALLY works :D
Posted: Thu Aug 03, 2006 2:46 am
by Ryu
zeii wrote:0x00801000 Would be the stack location?
Not exactly, the linear location would be 800h - 1800h. 800h would be the bottom of the stack, and 1800h is the top which is where the stack pointer begins at in linear, if you use SS=80h SP=1000h that is. Another thing you may get mixed up is that the first push for example wouldn't have been save at 1800h linear (using the stack I recommended with the example), but in fact it saves at address 17FEh first, so its in boundry of 800h - 1800h.
Re:My FAT12 Bootsector FINALLY works :D
Posted: Mon Aug 14, 2006 7:02 am
by BugHunter
Interesting topic, zeii could you post your final bootsector? :-*
Re:My FAT12 Bootsector FINALLY works :D
Posted: Mon Aug 14, 2006 1:02 pm
by distantvoices
@zeii: if you post it, take care not to post it with coffee stain all over the code, that'd be atrocious. *rofl*
as for your bug: you should set the stack to the next higher address of a segment of say 0x0020:0xffff - you set it to 0x0020:0x0000. (if this doesn't make any sense, pls ask. I'm low on coffee, it's late in the evening and I'm rather tired.)
as soon as something gets pushed, stack pointer decrements automatically (& will be at 0xfffd for 16 bit environment)
Just one question beside: Do you write certain words ugly on purpose? I have some difficulties deciphering some of them.