On Thu, 24 Sep 2009, larwe wrote:
On Sep 24, 10:19Â pm, Immortal Nephi <Immortal_Ne...@hotmail.com> wrote:you wish to do your own OS? Â I recommend. Â You study 80x86 instruction sets and BIOS before you are ready to read two files called IO.SYS andYou didn't read the OP's post. Stop spewing buzzwords and read what he wrote.
Keeping in mind I actually wrote a kindasorta OS (really more of a bootloader) already... Yeah. He definitely doesn't get it.
He intends to write a FAT-supporting OS on the existing 6502 hardware.
Correct.
Additionally, nobody in this era would begin a DOS project by reverse- engineering Microsoft's DOS (and you are aware those filenames are only correct for MS-DOS?). There are free open-source DOS clones.
Indeed. (In DOSEMU, I use PC DOS - mainly because there are a few things I do that break with FreeDOS, so I need more compatibility than it can provide. Also, as I said, MS-DOS is overkill - PC DOS 2.1 ibmbio.com, ibmdos.com and command.com take up together 40K, and I'm trying to keep the OS within 24!)
Seems like dosfs might be a good start. Dunno if cc65 can handle it and if it does it might be a little big, but...it's just a start.
-uso.