[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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> > Coco at maltedmedia.com

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>

>

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