From: Jim Brain <brain_at_jbrain.com>
Date: Sat, 17 Nov 2012 23:14:18 -0600
Message-ID: <50A86EAA.2030206@jbrain.com>
I've gotten a request to add some FLASH ROM on a VIC-MIDI cart under 
design and I am looking for a simple design to add that functionality.

I can't find any schematics for MegaCart, and the VIC-20 Final Expansion 
uses a CPLD, which I'd prefer to avoid for adding such a simple item to 
this cartridge if possible.

If someone has a link or information on a design, I'd be most appreciative.

I am assuming one would map the ROM into BLK5 (autostart bank), and put 
a bank register in IO space along with the MIDI registers to handle the 
high address lines.  My VIC knowledge is limited, though, and I'm not 
sure if /W works on BLK5.


Jim Brain

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Received on 2012-11-18 07:00:06

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