On 12/8/2016 11:02 PM, Clockmeister wrote: > Alphaworks http://c64zone.alphaworks.com.au/ also did a 16k version > with a simple bank switch solution. > I still have one somewhere. It doesn't look like they still sell it, > but might be worth an email. Feel free to email them (Kaspersky says that URL has a virus, so I didn't try to work around it). I whipped up a 15 minute untested design. Will send to Mark. I added the 3 high address lines on pads so someone can bank switch if they want. Designing a soft-banking solution requires at least 2 ICs (a latch to hold the bank and something to combine IO1, R/W, and Phi2), should be 3 (the C128 really needs the dual FF clock fixer circuit that Skoe and Martin Hoffmann-Vetter designed), and that started to sound like work... So, it's 2 2764-512 footprints, 3 resistors (for the upper address lines), 2 caps, and 2 jumpers. Seems pretty simple. Jim Message was sent through the cbm-hackers mailing listReceived on 2016-12-09 08:00:02
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