Retitled to more appropriate. John, It looks like any attachments are being stripped out. I attached a pic when I sent my original message and when I received it through the list distribution, no attachment. When Rodger attached the datasheet, it was stripped out too (he did send it to me directly). As Rodger mentioned, it's not a size issue, all are getting stripped out. Joe ________________________________ From: Rodger Boots <rlboots2@gmail.com> To: Technical Tools Mail List <techtoolslist@flippers.com> Sent: Thursday, November 21, 2013 9:34 AM Subject: Re: [Techtoolslist] Can anyone identify this chip? The attachment was only 230k. The person that really needed it has it (sent it directly to him). On Nov 21, 2013 12:39 AM, "David Shoemaker" <davids@oz.net> wrote:
I never ended up getting any of the attachments. And 2mb is not an issue for me :)
-----Original Message----- From: techtoolslist-bounces@flippers.com [mailto:techtoolslist-bounces@flippers.com] On Behalf Of John Robertson Sent: Wednesday, November 20, 2013 7:49 AM To: Technical Tools Mail List Subject: Re: [Techtoolslist] Can anyone identify this chip?
Hi Rodger,
Please resend your attachment, I've increased the size allowance to 2000kb (2mb) - hope that isn't a problem for anyone!
John :-#)#
On 11/19/2013 6:01 PM, Rodger Boots wrote:
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.
On Tue, Nov 19, 2013 at 7:31 PM, Clay Cowgill <c.cowgill@comcast.net> wrote:
That could be an 8Kx8 EEPROM. The '2365' part is jogging a memory way in the back of my brain from decades ago while making a 'flash cart' for an Atari 2600 development system. ;-)
I think the VTI part is correct-- the logo on the chip looks like: http://www.xsmicro.com/parts/VTI/2365-1181/
Maybe try reading it like a 28C64?
I'd wager a guess that it was the same place Murata bought, but back when they started out they were just making crosses for other manufacturers to get a start before doing their own stuff. (So like Sipex and Macronix that started off making Maxim RS232 chip copies and commodity EPROMs as a way to pay for their R&D of their own stuff which would eventually take over the catalog.)
-Clay
-----Original Message----- From: techtoolslist-bounces@flippers.com [mailto:techtoolslist-bounces@flippers.com] On Behalf Of Joseph Magiera Sent: Tuesday, November 19, 2013 5:26 AM To: Technical Tools Mail List Subject: Re: [Techtoolslist] Can anyone identify this chip?
Hmmm... I can see I attached a pic, but it didn't get through. Sorry about that. I have posted the pic here:
http://www.tollianweb.com/uc/vti.jpg
It's IC 1N from an Exidy 440 PCB (Whodunit in this case). I'd really like to identify the manufacturer. I looked at several IC logo web sites and nothing comes up. It's in a bank of 2764's and supposedly supposed to be able to be read as a 2764, but my EETools Top Max is unable to read it. Really a mystery to me why I can't find this symbol at all (and why if it is equivalant to a 2764 my reader can't read it). It's not a bad chip as the game boots up and passes all self tests without any complaining.
If anyone might be able to identify what IC is on 6K on the same boardset type, that would be appreciated too. On my board, it's a National 74S28(x) where "x" is either a 7 or an 8, but it's overlayed with an Exidy part number stamp. National 74S287 crosses to an MMI 6301 (Signetics 82S129) and a 74S288 crosses to a MMI 6331 (Signetics 82S123).
Trying to dump a Whodunit ROM version that's not in MAME. Thanks,
Joe
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