Re: Issue with 80COL/64K

[datajerk <datajerk@gmail.com>]

On Jul 12, 8:33 am, demp...@actrix.gen.nz (David Empson) wrote:
> datajerk <dataj...@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
> demp...@actrix.gen.nz

David, thank you.  Got a URL with info on the "older" card with jumper
so I know what to look for?

Thanks again.