[Coco] OS-9 80-column driver is ready

Tue Sep 24 15:52:20 EDT 2013

It already uses  2bytes: FF78 and FF79. We should add a jumper to move it
then.

Damn this little board is better than I thought :D

On Tue, Sep 24, 2013 at 3:38 PM, Gene Heskett <gheskett at wdtv.com> wrote:

> On Tuesday 24 September 2013 15:31:36 Bill Pierce did opine:
>
> > That would be my question.... will it work under L2?
> > If so, with an MPI (or DW ftm), it would give 2 monitors. I know Gene
> > used to run his like that so he would know more of the limitations
> > there.
>
> I don't recall what address I actually wound up using, but it was up in
> that neck of the woods.  The WP-RS needs 4 addresses in the usual block,
> but the OEM decoding used 2 addrresses from the top of one 4 byte block,
> and 2 addresses from the bottom of the next block up, which meant it hogged
> 8 of the coco's very valuable I/O addresses.  So the iron got warmed up &
> that got fixed, and the drivers defines fixed to reflect the fix, but
> AFAIK, none of that ever made it onto the copper leaving the place.
>
> So I would suggest that its address needs, only 2 byte wide, should be made
> portable enough to put it anyplace in the $FF7X block except of course for
> the $FF7F of the MPI's control registers.
>
> > Bill Pierce
> > My Music from the Tandy/Radio Shack Color Computer 2 & 3
> > https://sites.google.com/site/dabarnstudio/
> > Co-Webmaster of The TRS-80 Color Computer Archive
> > http://www.colorcomputerarchive.com/
> > Co-Contributor, Co-Editor for CocoPedia
> > http://www.cocopedia.com/wiki/index.php/Main_Page
> > E-Mail: ooogalapasooo at aol.com
> >
> >
> >
> >
> > -----Original Message-----
> > From: tonym <tonym at compusource.net>
> > To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>; coco
> > <coco at maltedmedia.com> Sent: Tue, Sep 24, 2013 1:07 pm
> > Subject: Re: [Coco] OS-9 80-column driver is ready
> >
> >
> > Alibaba.com shows a few suppliers available...
> >
> > http://www.alibaba.com/showroom/crt9128-000p.html
> >
> > Rochester Electronics also:
> >
> > http://www.rocelec.com/search/finished/CRT9128-000P/0/1/contains/?utm_so
> > urce=supplyFrame&utm_medium=buyNow
> >
> > Is this a board that can be easily replicated?
> > Will your L1 driver work under L2?
> >
> > Tony
> >
> >
> >
> > ---- Original Message ----
> > From: billg999 at cs.uofs.edu
> > Sent: 9/24/2013 12:23:34 PM
> > To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
> > Subject: Re: [Coco] OS-9 80-column driver is ready
> >
> > > Well I call it protype because in fact it was a prototype made in 1985
> > > by some company called PHB in Texas. Is what is written in the label
> > > :P
> > >
> > > I'm doing the schematics and I will try to make it in protoboard, but
> > > it will take a while since I'm a software guy not a hardware.
> > >
> > > But yes the circuit is so simple that it can be easily copied. I think
> > > the most difficult part is to find the CRT9128.
> > >
> > > I found in china the CRT9128-000P.  I hope is the same ? If the
> > > protoboard works I can see the possibility to make a batch of it.
> >
> > I did some quick research and it appears the "000P" is the same device
> > probably refers to plastic as opposed to ceramic packaging.  The bad
> > news is that they do not appear to be manufactured by anyone any more.
> >
> > I wonder if there is some other similar but newer chip that could be
> > designed into the circuit?
> >
> > bill
> >
> >
> >
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> >
> >
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> >
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>
> Cheers, Gene
> --
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