[Coco] On John Linnville's Color Computer Game Master Cartridge Design

[Darren A]

On Wed, Aug 2, 2017 at 3:14 PM, John W. Linville <linville at tuxdriver.com>
wrote:

> On Wed, Aug 02, 2017 at 12:53:24PM -0600, Darren A wrote:
> >
> > I have been going through the same exercise recently.  Before trying to
> > write some HDL for a CPLD implementation, I rigged up the following
> circuit
> > on a breadboard for testing:
> >
> > https://drive.google.com/file/d/0B_o8KocZC3DSenp4em0xWFloOVk/
> view?usp=sharing
>
> Does this design work? At first glance, it doesn't seem right to me.
>


Yes, I have it working on a breadboard, as shown.  I know the address
decoding is too simplistic, but I just wanted a quick way to test the
interfacing with parts I had on hand.

What doesn't seem to be right?


- Darren