Re: Faking RWTS13: Trying to figure out how to do something

[Lyrical Nanoha <LyricalNanoha@dosius.net>]

On Mon, 28 Nov 2005, Linards Ticmanis wrote:

> Lyrical Nanoha wrote:
>
> > or something like that.  (It looks like the boot sector is loaded at $0300, 
> > so we might have to be careful.)
>
> The boot sector is loaded at $0300 - but the bytes will be in a different 
> order in memory compared to where they are on disk as seen by the RWTS of a 
> full-fledged DOS 3.2, because there's not enough room in the 256 bytes of ROM 
> to decode a 13-sector boot sector in the standard DOS 3.2 way.

I did disassemble the boot sector, but I can't make heads or tails of it 
since it seems to be doing some very bizarre things.  The link is in a 
previous post I made to the group.  For one, there is an address, $CxD1, 
which a trace never leads to, but which contains part of the boot code. 
Relocating the boot sector to $8600 and running it on a system with a 
16-sector ROM didn't work, either - but I don't know what it's trying to 
do or how it loads the sector.  If the code didn't use tricks like that, I 
would just be able to relocate it down to $8600 and call it.

-uso.