> I've never found this board at a decent price on ebay... > > that's why I was thinking to rebuild one > I'm actually on a reproduction of the 8032 64k extension Actually I'm almost done with a SuperPET clone, the PCB layout on a 10 x 10 cm board is near completion. I'm using a EPM7128 CPLD by Altera (PLCC84 housing), 128 KB Flash, 512 KB RAM, 6551 ACIA and a few TTL chips and the 6809E CPU of course. Its main purpose is to upgrade a stock 8032 board to a SuperPET board but some other configurations, such as emulating an 8096 RAM extension should be possible as well. Due to its unbeatable simplicity, I've kept the solution of powering the 6502 off when the 6809E is active but offered support for the WDC65C02 as well. The WDC65C02 seems to allow to tristate the address bus and data lines, so I added a jumper to the board to use this one too instead of the old NMOS 6502. If some of you guys would be interested in having a look at my design, I'd upload the design to my website. As I said, it's almost done, but maybe good reasons will arise for late time changes. Nils Message was sent through the cbm-hackers mailing listReceived on 2017-10-18 13:00:02
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