Re: Schematic for 80 Column Adapter for C64

From: Steve Gray <sjgray_at_rogers.com>
Date: Sun, 18 Aug 2013 10:01:05 -0400
Message-Id: <5A74DAF7-8CFE-4835-ACD5-78BE163E3A61@rogers.com>
Figures, swoc mentions it as well... 
http://www.floodgap.com/retrobits/ckb/secret/operiph.html

Steve


On Aug 18, 2013, at 9:57 AM, Steve Gray <sjgray@rogers.com> wrote:

> I have seen a picture of a prototype board that is likely based on these schematics. Perhaps we can get a rom dump from it? I think there is a thread on lemon64 mentioning it.
> 
> I also picked up an xep80 hoping to get it working on the c64. I suppose you could connect it to the user port instead of the joystick port... Perhaps to one of those userport joystick adapters.
> 
> Steve
> 
> 
> On Aug 18, 2013, at 6:49 AM, silverdr@wfmh.org.pl wrote:
> 
>> 
>> On 2013-08-18, at 00:58, Bil Herd wrote:
>> 
>>> Some schematics for some odds and ends, more coming.
>>> http://c128.com/commodore-c64-80-column-adapter
>> 
>> Bill,
>> 
>> thanks! Great to know that you may have even more of those hidden pearls :-)
>> 
>> You probably don't know (do you?) if this ever went out of the drawing stage? Like a working prototype for example?
>> 
>> BTW - it reminds me like some years ago I put my hands on the XEP-80 (an 80-column add-on for Atari "8-bitters"). This thing plugs into... joystick port and joystick ports are the same in both C64 and Atari series! Since I always wanted 80 columns too, I immediately plugged this into my 64, spent a whole weekend writing a driver that would properly serialize data and handle required communication timings, then I bound it to the KERNAL so that the default screen I/O would go over the XEP, and... yeah.. "gotcha!". Only then, when trying to type-in the first LOAD command on the XEP display, I realized that no matter how hard I try, I shall never be able to use the 80-cols display AND the keyboard at the same time. I don't ever recall feeling as stupid as I felt that Sunday evening... ;-)
>> 
>> -- 
>> SD!
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> 
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Received on 2013-08-18 14:01:55

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