Re: Weird PCB attached to C64 ROM

From: Uffe Jakobsen <*uffe_at_uffe.org*> Date: Mon, 20 Feb 2012 10:05:49 +0100 Message-ID: <4F420CED.4060701@uffe.org> · uffe_at_uffe.org

On 2012-02-20 07:51, Baltissen, GJPAA (Ruud) wrote:
> Hallo Jim,
>
>> I'm mainly interested in the circuit board...
>
> I found the site but I didn't see a picture showing the PCB.

For the time being its the topmost article on the front of 
http://c64.com.pl/

Direct links to pictures below:

http://c64.com.pl/img_aktualnosci/011a.JPG
http://c64.com.pl/img_aktualnosci/011b.JPG

> But what
> about a 74LS293 4-bit counter which outputs are connected to the extra
> address lines? The restore key, as seen by Donni, plus
> resistor/condensator can create the needed pulse. Some LEDs or better, a
> 7-segments display, tell you what part is choosen.
>

My guess would also be in that direction - some discrete counter IC

       Message was sent through the cbm-hackers mailing list