Here's a survey what's available and combinable. In general, the hardware is always sold with a software package. Available revisions are 1.3 - 1.6. It's not possible to record four tracks and monitor pre-recorded samples. Or use it as an effect- device.
External synchronization is possible.
Pulsar succeeds TDAT, so it has the same features plus some very interesting ones. This card comes with four Sharc DSPs onboard. The software shipped with it includes a virtual synthesizer, which uses the onboard DSPs. Of course it makes sense to use A8 or A16 in conjunction with Pulsar. Since there's no relation to the tripleDAT system, it won't be described here.