Re: UltiMax schematics

From: Marko Mäkelä (
Date: 2008-11-28 20:46:00


On Fri, Nov 28, 2008 at 04:54:49PM +0100, donni wrote:
> I have a photo online that shows the connection between pin 9 & 10.
> It's a max minibasic cartridge and you can see the jumper J5 on the picture 
> connecting the two pins.
> Picture:

Pins 9 and 10 are -EXROM and -I/O2 on the C64.  It should be safe
to short them, but strange things could happen when accessing $df00..$dfff.
The picture also shows that pin 8 (-GAME) is shorted to ground to activate
UltiMax mode on the C64.


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