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Subject:	Re: Adding 64-bit file support to DJGPP
From:	Jim Michaels <jmichae3 AT yahoo DOT com>
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On Tuesday, January 17, 2006 9:00:52 PM UTC-8, 0483218 DOT  DOT  DOT  AT t-online DOT de wrote:
> Hi!
> 
> I would like to know how difficult it would be to add support for
> 64-bit file operations to DJGPP. I suppose that DJGPP currently only
> handles 32-bit file operations internally; is this assumption correct?
> If yes, it would be necessary to extend the internal file handling
> routines of DJGPP to 64 bit before any attempt to add support for new
> APIs could be made.
> 
> Is anyone currently working on this, or has been working on this
> before? If yes, I would be interested in his assessment. If not, what
> would be a good starting point?
> 
> Regards,
> 
> Udo

opengem is the closest we've got to something usable in DOS for a GUI.

- there are int13h function calls for basic disk i/o. note that this is deprecated in favor of UEFI.
- there are extended int 13h function calls for LBA-based disk i.o if you don't like old severly-limited CHS. see the phoenix extended 13h disk bios calls pdf. note that this is deprecated in favor of UEFI.
- there are int 21h functions which is what DJGPP is based on for 8.3 file I/O.  note that MBR+BIOS calls is deprecated in favor of UEFI.

- Raw text -