[Diy_efi] Looking for help with a prom N82S181

[FR Wilk]

You have twice the capacity in the 2716. Did you put the data in it
twice?A10 on the 2716 is a CE on the N82S181. It may be accessing the upper
1K and not the lower 1K.

'CE' and 'CE Not' is how pin 18 is marked on the two. You may have to lift
pin 18 and wire it to 'OE Not' or something similar. The N82S181 has 4 CE
pins (2 CE and 2 CE Not), figure out how the board is wired up first. The
2716 has A10, CE Not, OE Not.

FR Wilk
_______________________________________________________

----- Original Message ----- 
From: <mbelloli at speedymotorsports.com>
To: <diy_efi at diy-efi.org>
Cc: <hexibot43 at yahoo.com>
Sent: Saturday, November 06, 2004 11:36 AM
Subject: [Diy_efi] Looking for help with a prom N82S181


> Hello Everyone,
>      I am in the middle of changing the spark table for a friends 1984 gmc
> pickup with computer controlled timing, and carburetor.  I've done
> quite a bit with the tbi ecms, and honestly this is my first computer
> of this generation.  I have been able to copy the prom, and with help
> found the spark table.  I've modified it, and put a copy of it on a
> 2716, which is a 2k x 8 eprom.  I started with a N82S181 1k x 8 prom.
>  I thought I would be able to just simply drop the eprom where the
> prom was, but I wasn't so lucky.  I am not familar with the chip
> enable on the original chip, N82S181.  It has 4 chip enable lines,
> and it looks like two of them are hex inverted.  Does anybody have
> any idea how this chip works???  I got a data sheet from Jameco,
> which helped but was missing key information.  I figure I'm going to
> have to make a dip socket sandwich with some changes for the enable
> logic.  Thanks,  Marcello A. Belloli
>
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