2708 Programming Algorithm?

I obtained a bunch of 2708 UVEPROM's, and I'd like to be able to program them. As you may know, they require a different algorithm than the 2716 and on, and three voltages, +5, +12, and -5. I'm building a little board that will program 1/2 (the upper or lower) of a 2716 to a 2708 (I can program 2716's). But I can't find a description of the algorithm that is detailed enough. What I think I know is: 1. The /OE line must be high 2. select address and data (start at addr 0) 3. bring PGM line from 0 to 27 volts for 1 mSec, then drop back to 0 (this seems very strange) 4. repeat 100 times per address (not all at once, increment the address lines and loop to avoid "overheating" a byte. 5. drop /OE and verify. Does anybody have an authoritative description, and a current requirement for the +5, +12, -5, and programming pulse? Thanks. __________________________________________________ Do You Yahoo!? Yahoo! Health - your guide to health and wellness http://health.yahoo.com