Re: PROM replacements, etc. (was re:Just a little show and tell)

I use Eagle from CadSoft. They offer a freeware version for PCBs 100 x 80
mm max. www.cadsoftusa.com
Advance Circuits is an ok board house, not the best though.

- Steven

--------------------------------------------------
From: "Bill" <sociableone@gmail.com>
Sent: Friday, October 09, 2009 9:00 AM
To: <vectorlist@vectorlist.org>
Subject: RE: VECTOR: PROM replacements, etc. (was re:Just a little show and
tell)

> Who do you guys suggest for small run pcbs and which PCB layout software?
> I've got some ideas myself and would like to take the plunge. I don't
> have
> access to high end CAD software.
>
> Thanks,
>
> Bill
>
> -----Original Message-----
> From: owner-vectorlist@vectorlist.org
> [mailto:owner-vectorlist@vectorlist.org] On Behalf Of Clay Cowgill
> Sent: Thursday, October 08, 2009 10:18 PM
> To: vectorlist@vectorlist.org
> Subject: VECTOR: PROM replacements, etc. (was re:Just a little show and
> tell)
>
>> I started this message is response to the question "has
>> anyone made any progress on their Cinematronics stuff?" so I
>> thought I'd add this link:
>> http://www.biltronix.com/CCPU_Custom_Chip_Replacements.html
>> I have tested this small devices on my own CCPU boards and so
>> far so good.
>
> Cool, Bill-- and handy. ;-)
>
> I don't know if I posted this here or not (I know I mentioned it somewhere
> or other) a while back, but I did this thing for SW/ESB:
>
> http://www.embeddedengineeringllc.com/swesb/SW_deprom.jpg
>
> Gets rid of all four of the mathbox PROMs on SW/ESB boards (and usually
> two
> or three *WATTS* of heat generation from the bipolars to boot!).
>
> It is a decidedly un-clever solution. It's just two ~45ns, 5V, OTP EPROMs
> with the mathbox code repeated a bazillion times. ;-)
>
> The one running in our machine at Ground Kontrol has passed 7500 hours
> now--
> no failures, glitches, or other weirdness. (Anthony commented to me that
> we
> actually hit a one year anniversary on keeping Star Wars running without
> interruption. ;-)
>
> -Clay
>
>
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Received on Fri Oct 9 11:33:20 2009