Where 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 6:17 PM
Subject: RE: Where to get ZIFs and EPROMs?

Faster and more accurate then my pen+pad thou.
Thanks for those masks, at that URL.
Wound up referencing the .bins I have by ecm+mask no..
Almost can find stuff now!!.
Thanks
Bruce


>No, the actual clock speed is xtal/4, this puts the p6 and p66's at a tad
>over 2 mHZ. or 500ns. Pretty slow huh.
>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 Bruce
>Plecan
>Sent: Sunday, March 07, 1999 2:06 PM
>To: diy_efi at efi332.eng.ohio-state.edu
>Subject: Re: Wher to get ZIFs and EPROMs?
>
>
>----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.
>>>
>>
>