1982 ECM Rom type????????

[Scott Schaaf]

Jake Sternberg wrote:
> 
> Hi all, i'm very confused:
> 
> I have everything from a 1982 camaro with crossfire injection.
> 
> the ECM has a chip in it which is 24 pins, shaped just like a
> 2732 EPROM.  That's what i thought it was.  I have the original
> chip and a Hypertech chip for this application.  Both have been
> used in this setup before it was removed from the camaro.
> 
> Neither of these chips will give me anything in my ROM burner.
> I have a MCT rom burner only about a few years old, and it's set
> to 2732 ROMs.  I tried 2716 and 2764 but got the same result:
> all FFs as though there were no chip plugged in.  I put in some
> known good 2732s in there and they read properly over and over
> again.
> 
> There must be something fundamental that i'm missing.  The hypertech
> chip says 82S181 on it under the label, but i couldn't see what else
> it says under there.  What am i missing?
> 
> This ECM uses an external ESC/knock box and has the circuitboard-edge
> style connections. It's from 1982.  What are these chips?
> 
> Thanks all,
> -jake


Jake,
	The 82S means that it is a PROM.  NOT erasable.  I am not near my
databooks, but I believe it is a Signetics chip.  These are also known
as 'Bi-Polor' PROMs.  As soon as I get to my books,  I 'll look it up.  

					Scott...