Hi, I'm Tektronics I've got an XD88 (running now, thanks to list help!) - they really do fly for the age of the things. I can't remember how many 88100 chips it has - just the two I think. Not sure of the core speed either. My system's the '10 with the 8-bit framebuffer; wouldn't mind the '30 with the 24-bit unit (from the scare info I've heard this was a significantly different machine with a proper expansion bus etc.) I don't know why these things failed - I know they were hidiously expensive when new though ($15000 for an '88/10 in the late 80's) so maybe there just was no market for them... bet there aren't many left these days! cheers Jules