Re: Issue with 80COL/64K

[dempson@actrix.gen.nz (David Empson)]

datajerk <datajerk@gmail.com> wrote:

> On Jul 11, 11:23 pm, mdj <mdj....@gmail.com> wrote:
> > On Jul 12, 11:33 am, datajerk <dataj...@gmail.com> wrote:
> >
> > > My IIe has an 80 col card, however sans the 64K.  I just received
> > > today a 607-0103-K 80COL/64K expansion card, however when I replace my
> > > 80 col card the machine boots with garbage on the screen.
> >
> > > Questions:
> >
> > > 1.  Does this circa 1986 card work in non-enhanced IIes?
> >
> > Just how old is this IIe ? :-)
> >
> > It's possible that your machine has the Revision-A motherboard. If
> > that's the case, you either need a newer motherboard, or an extended
> > 80-column card with a jumper on it.
> >
> > The Revision-A IIe isn't capable of producing double hi-res graphics,
> > and the hardware changes required a change to the extended 80-column
> > card circuitry, hence the jumper.
> >
> > Unfortunately, the 80 column card you have is one of the miniature
> > designs that shipped as standard equipment in the later platinum IIe's
> > which are hardwired for the later motherboard design. If you could
> > photograph and/or post the part number and serial number of the
> > motherboard though, we can confirm whether this is the case or just
> > idle speculation.
>
> Model/Serial from case bottom:  A2S2064/1A252-035976
> 
> Numbers from MB: 820-0064A, 607-0164-[ ] by slot 4, and an ink stamped
> 0583 by slot 2

820-0064-A is a revision A IIe motherboard, the NTSC model of which is
not compatible with the miniature extended 80-column card from the
platinum IIe (and it also can't do double hi-res graphics).

You need either a newer motherboard or an older extended 80-column card
with a jumper.

-- 
David Empson
dempson@actrix.gen.nz