[Coco] Drive controller problem

[Bob Devries]

Bill,

Can you check the first two bytes at $C000 when the HDBDOS ROM is inserted? 
They should be $444B(68, 75 decimal). If that's not what you get, your ROM 
is bad.

Regards, Bob DEvries
Dalby, QLD, Australia


----- Original Message ----- 
From: "Bill" <cwgordon at carolina.rr.com>
To: "Coco Enthusiasts" <coco at maltedmedia.com>
Sent: Wednesday, April 02, 2014 3:17 AM
Subject: [Coco] Drive controller problem


>I have a problem with one of my drive controllers. Whenever I swap out the
> 24pin chip for an HDBDOS chip, the controller works perfectly. When I put
> the original chip back in it gives me an "EXTENDED COLOR BASIC" message.
> Something tells me it's the chip itself.
>
> I'm looking for someone who has a spare chip they would sell for a
> reasonable price. It's the 24 pin TMS4764-30NL
>
> Thanks
>
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