[Coco] drivewire serial port progress

[Arthur Flexser]

The upper 8K is definitely accessible on a CoCo 3 IF you have a controller
that has that upper address line properly connected.  Most Radio Shack
controllers do not, but all third-party controllers that I know of,
including the Disto Super Controller, do, though Roger's may be defective in
that respect.

Art

On 11/30/09, Mike Pepe <lamune at doki-doki.net> wrote:
>
> I think the CoCo3 only enables the CART line for the first 8K of the
> external ROM by default, but I'd have to recheck the service manual to be
> sure about that.
>
>
> > -----Original Message-----
> > From: coco-bounces at maltedmedia.com [mailto:coco-
> > bounces at maltedmedia.com] On Behalf Of Arthur Flexser
> > Sent: Monday, November 30, 2009 4:15 PM
> > To: CoCoList for Color Computer Enthusiasts
> > Subject: Re: [Coco] drivewire serial port progress
> >
> > You might check if pin 37 of the edge connector of the Super Controller
> > shows proper continuity to pin 26 of the EPROM socket, which is the
> > line
> > that controls access to the upper 8K.
> >
> > Art
> >
> > On 11/30/09, Roger Taylor <operator at coco3.com> wrote:
> > >
> > > At 10:49 AM 11/30/2009, you wrote:
> > >
> > >>  I
> > > Now you ask, why do I use DriveWire when I have my own bitbanger
> > drive
> > > system?  Because I can't get my 16K ROM to work in the Super
> > Controller!  It
> > > just won't work.  It's like only the lower 8K is seen.  There's a
> > jumper on
> > > the board that I have no clue about and it didn't seem to help any.
> > As soon
> > > as CoCoNet boots up and is scanning the ports for available devices
> > (you can
> > > see this on the text screen), the first call to the upper bank causes
> > a
> > > crash.  Yes, I'm doing it the right way.  The ROM works in any
> > socket-based
> > > pak I've got but the Super Controller.
> > >
> > > --
> > > ~ Roger Taylor
> > >
> > >
> > >
> > >
> > > --
> > > Coco mailing list
> > > Coco at maltedmedia.com
> > > http://five.pairlist.net/mailman/listinfo/coco
> > >
> >
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>
>
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