[Techtoolslist] Can anyone identify this chip?

[Rodger Boots]

What engineers will do to avoid one 74138.


On Tue, Nov 19, 2013 at 9:51 PM, Clay Cowgill <c.cowgill at comcast.net> wrote:


> I was blowing off the Mask ROM possibility thinking that there was no way

> Who Dunnit had enough of a run to merit mask, but now that I think about it

> that makes sense-- although it's not mentioned in the MAME driver comments,

> Who Dunnit 1N is actually the same as Crossbow, Combat, and Catch-22... So

> that makes sense to be mask after all.  (And it'll probably be identical to

> those.)

>

> -Clay

>

> -----Original Message-----

> From: techtoolslist-bounces at flippers.com

> [mailto:techtoolslist-bounces at flippers.com] On Behalf Of Rodger Boots

> Sent: Tuesday, November 19, 2013 6:02 PM

> To: Technical Tools Mail List

> Subject: Re: [Techtoolslist] Can anyone identify this chip?

>

> OK, here we go.  Teeray nailed it.  Datasheet attached, just need to strap

> pins 26 & 27 to whatever the game uses to access this part and read it as a

> 2764.

>

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