Data I/O 2900 - How good is it?

Dave wrote: It's never been clear to me whether the difference in device support between the Unisite, 2900, 3900, and 3980 is due to actual hardware differences, or just "product differentiation" in the software. While it's certainly possible that the 2900 hardware can't deal with the 2708, it seems somewhat unlikely. At the time they designed the 2900, the kind of corners that they could have cut that would have rendered the hardware incapable of dealing with the 2708 would have been too likely to also cause it to be be unsuitable for (then) future programmable logic devices. In any case, if you get a good deal on a Unisite, they're quite useful since they can program some parts that the 2900/3900/3980 cannot. The rev 12 and newer are best, but for programming old parts, even the earlier ones are fine.