Re: Booting from HDD

How cool it this! Thanks Nick, for sharing. Ray out.

On Mon, Mar 31, 2008 at 10:32 AM, Nick Maroudas
<[email protected]> wrote:
> Dear Ray,
>
> The same line, inserted into block 30, also booted the
> image which you sent me, namely:  myCF05.img
>
> Having proved that the display address from VBE call
> 4F01 is all that CF05 needs in order to boot new PC
> from
> floppy, I would now like to boot the same image from a
> USB thumbdrive stick. (Just for fun - legacy floppy and
> USB floppy will last my time :)  Having made a start by
> putting Howerd's color.blk (the image that boots on the
> most PCs) onto a stick, it booted up to the point where
> the floppy drive started to whirr.  Obviously, some
> part of the code was still looking to load from a real
> floppy.  If a boot floppy was then inserted, that
> carried the same image - color.blk - the thumbdrive
> boot process concluded succesfully.
>
> Next step: try booting CF05 from thumdrive in "no
> emulation" mode.  I believe this can be used to copy
> ALL the sectors into RAM (not just the boot sector) via
> INT13.  Then a minimal mod to Josh's code: jump over all
> the calls to real floppy hardware - probably to his line
> 123 "mov esi, maind" in "start2:" of his "boot.asm".
>
> Caritas,
>
> NickM
>
> *****
>
> Apology for writing so long; not enough time to make it
> short by writing the code.
>
>
>
> Quoting Nick Maroudas on Wed 26 March
>
> >... " calls VBE 4f01....
> >... " Josh's CF05 has "displ" at byte address FA0,
> >... which is 3E8 in a CF dump.
> >... " So define a new hex word in block 30 (Colors
> etc)
>
> >... " plug this VBE address into Chuck's "displ" slot.
>
>
> >... "
> >... "    forth   : display 40000000 3E8 ! ;   display
> >... "
> >... "
> >... " and voila!  Sound and vision from JG's CF05 on a
> >... "
> >... " NickM
>
> >... "
>
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-- 
Raymond St. Marie ii,
colorforthray.info