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Re: UNKNOWN BOARD for ][+

In article <4avie9$jg0@merlin.delphi.com> DAVID O'NEILL
<vanguard1@beta.delphi.com> writes:
>I have a board for a ][+ which I think is a EPROM programmer.
>The company that made it is Tymac Controls Corp. and the
>board is called a PPC-100 Tackler.
>
>Anyone know what this is or how it works??

That's not an EPROM burner, it's a parallel printer interface card.

I used to have a PPC-100 in the old Apple II+, hooked up to a C. Itoh
printer (the one that eventually evolved into the Imagewriter).  It works
OK in the II+, but it has problems in the IIe and later machines, because
its firmware calls an "undocumented" ROM entry point that went away when
the IIe came out.  The problem can be fixed by changing two bytes of the
card's EPROM code, but of course you'd have to re-burn the EPROM to do
that.  (Why does that sound circular?)

             - Neil Parker
-- 
Neil Parker, nparker@{cie-2,cie}.uoregon.edu, http://cie-2.uoregon.edu/~nparker

     "I was going to be a neo-deconstructivist but Mom wouldn't let me."
                                     -- Calvin and Hobbes, 7/13/1995