hey,
i've got a couple of the tekmagic boards and have since '98; i've got some experience with these things and can recommend you probably don't want to run one on anything less than a rev 6.x. i tried running one on a rev 4.3 and the machine wouldn't even boot, even with the "DTACK Pullup Resistor" jumper enabled.
i have a 6.2 or 6.3 motherboard laying around which works but is a little fried... i think one of the CIAs is flaky... i'd be willing to part with it, even in a case & all.
rock on,
trilobyte