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

[thergen at svn.net]

Since Scott was able to narrow it down to Signetics...

82S181 (8K-Bit TTL Bipolar PROM) pinout:

 A7  1  24 Vcc
 A6  2  23 A8
 A5  3  22 A9
 A4  4  21 CE1~
 A3  5  20 CE2~
 A2  6  19 CE3
 A1  7  18 CE4
 A0  8  17 O8
 O1  9  16 O7
 O2 10  15 O6
 O3 11  14 O5
GND 12  13 O4

Tom

On Mon, 9 Nov 1998, Scott Schaaf wrote:

> 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...
>