Re: CBM B Series MS DOS 1.25 Available

From: Cameron Kaiser (spectre_at_floodgap.com)
Date: 2008-02-09 05:01:18

> > > MS DOS 1.25 was sent to Commodore for use with their B Series systems
> > > with  a 8088 co-processor board.  It never made it into production.
> >
> > I have a very evil idea if anyone is interested. I've long been tempted to
> > write an 8088 VM emulation for the 6502, just for yuks, and boot some
> > simple form of MS-DOS.
> >
> > Would there be appropriate glee if I hacked something together to allow
> > the 128 to boot and run this DOS, to allow others to play with it? It
> >  would be slow, but at 2MHz, possibly doable. I'm not interested in using
> > the Z80 for this purpose as the performance (to do the abstraction) would
> > likely be worse.

> What would you be abstracting?

Mostly memory accesses.

> The z80 instruction set is, I believe, a superset of the 8080's.

It is, but the board is an 808*8*. ;-)

Plus, as an architectural exercise, making the 8502 do it is more fun. :-D

-- 
------------------------------------ personal: http://www.cameronkaiser.com/ --
  Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser@floodgap.com
-- Born free. Taxed to death. -------------------------------------------------

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