Re: Schematic for 80 Column Adapter for C64

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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