Wher to get ZIFs and EPROMs?

[Bruce Plecan]

----Original Message-----
From: Ward Spoonemore <spoonie at deltanet.com>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Sunday, March 07, 1999 2:57 PM
Subject: RE: Wher to get ZIFs and EPROMs?

I though the P-4 were at 5-6 Mhz?.
Bruce


>These ECM's clock at 1 mhz, that's 1000 ns, I don't think you could find
>chips that are to slow, most likely they would be more noise susceptible is
>the they are too fast.
>Ward.
>
>-----Original Message-----
>From: owner-diy_efi at efi332.eng.ohio-state.edu
>[mailto:owner-diy_efi at efi332.eng.ohio-state.edu]On Behalf Of
>ECMnut at aol.com
>Sent: Saturday, March 06, 1999 8:29 PM
>To: diy_efi at efi332.eng.ohio-state.edu
>Subject: Re: Wher to get ZIFs and EPROMs?
>
>
>Bob,
>I have had problems with 'some' 250ns chips in my 7749 ecm.
>I got a prom error and it went into limp mode.  I think he should
>use 200 or faster.  On the other hand, I may have had some duds.
>Mike V
>>
>>  These are National Semiconductor 256's, CMOS, quartz windows, at
>>  250ns access. They are pulls that I purchased from Astro Marketing.
>>  If these will do, $1 @ plus ship. I have 30 that I can sell.
>>
>>  I'm posting this so that maybe someone can help as to the access time,
>>  I don't know if these are correct for Ted's application.
>>
>