Jay and Ben:
thanx for the wonderful stories, but harddrives are not what I started this subject for..... I just told the 8751's in HMOS (predecissor of the 87C51 in CMOS)that I have came out of a harddrive, I erased the internal Eprom via the UV window and want to know how to program them FOR OTHER experimental purposes, so I need the DATASHEET... ;-)
Thanks anyway for your interest in my note !

Henk