Odp: [sdiy] 27C512 not Eprom?

[Roman]

> So these are Eproms in a window less housing = OTP,
> guess it makes sense from a economic perspective.
> Well too bad :(

why? Are they already programmed? Maybe there's a chance
they are ampty? Then you'd have lifetime supply of eproms.
Who needs to erase them anyway if they're for free :)

> Mean while, anyone got a idea where -48V to 5V DC/DC converters are good
> for? (got a "view" of those too)

unles you don't have a PBX in your basement, or even better, a central
office, you can use'em as a doorstop. They could've been used to power
"modern" 74xxx circuits forming "advanced" brains of a central, which
is usually powered from -48V, and that kind of voltage would cause TTLs
to work a bit too fast ;) hence converters.

Roman