Re: Serial line PET

From: André Fachat (
Date: 2007-06-29 19:57:47

Yes, it's experimental, but the source is included. 
I had started with re-sourcing the PET4 ROMs to a version
that actually assembles with XA, then removed the Editor and
found the places where the ROM actually jumps to directly!
Commodore implemented an extra editor jump table, who cares anyway....?
In the source you see which addresses had to be emulated.
The tar.gz contains the source for the new editor only, not
the rest of the ROMs.


-------- Original-Nachricht --------
Datum: Fri, 29 Jun 2007 05:48:38 -0700 (PDT)
Von: Cameron Kaiser <>
Betreff: Re: Serial line PET

> > in my attempt to provide a simple OS for my selfbuilt single-board
> computer,
> > I managed to replace the PET Basic4 editor with something that uses an
> > UART16550 RS232 interface instead of the screen.
> > 
> > You can find it on this page:
> >
> Interesting. Do you have any "diffs" or info on exactly what you had to
> patch? I see you have source -- is it in there?
> -- 
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> --
>   Cameron Kaiser * Floodgap Systems * *
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