1982 PROM QUESTION unanswered!

[Scott Schaaf]

Jake Sternberg wrote:
> 
> Okay people, i know these chips are not erasable.  I'm
> not trying to erase them, i'm trying to read them.  My
> rom burner doesn't care whether a chip is erasable or
> not when i'm READING the chip.  When i write to a chip
> I use one with a little glass window after erasing it
> with ultraviolet light; these are factory OTP (one-time
> programmable) chips.  But i want to READ them.
> 
> Does anyone know why i can't READ the delco OEM PROM
> nor the hypertech aftermarket PROM on this 1982 ECM
> (crossfire injection from a camaro)???
> 
> I theorize it may have something to do with signal levels
> or some other weird stuff.  I might try plugging them
> into an ethernet card reading the data through DEBUG using
> the computer as a rom reader.
> 
> Thanks,
> -jake


Occasionally,  chip manufacturers will invert the 'chip-enable' line.  (
Make it active HIGH ).  I had this ALOT in williams pinball machines.  I
DON'T think this is the case here, tho!  I almost sounds like a couple
of blown proms!  ( I hope not!! )

					Scott...