Programming 2708's

All this talk of 2708s and how to program them makes me wonder.... I've got some PROMs of various sorts (mostly UV-erase, but a few 28xxx EEPROMS). I'd like to throw together a burner. But to this end, I find I care about things such as differences between one maker's 27512 and another's. Is the sort of trouble described for the 2708 something that was worked out of PROMs early in their existence, and for later devices I can use pretty much any manufacturer's data sheet, or do I have to make sure I use a reference that corresponds to the exact maker and chip I'm trying to write? If the former, what counts as "later"? /~\ The ASCII der Mouse \ / Ribbon Campaign X Against HTML mouse at rodents.montreal.qc.ca / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B