SUMMARY (revised): clock battery on a SS1?

From: Christopher L. Barnard (cbarnard@cs.uchicago.edu)
Date: Mon Jan 15 1996 - 10:17:48 CST


I ended my original summary by saying:

> > Thanks also to John Valdes for mailing me a copy of the NVRAM FAQ, which
> > I will follow in trying to piggyback a new 3v battery onto the existing
> > NVRAM. (Much cheaper).

Mark C. Henderson (mch@squirrel.com) informs me that the NVRAM FAQ is a
bit out of date; the NVRAM chips only cost about US$20.00. His mail to
me:

> Mauser Electronics
> 800-346-6873
>
> order one of the following part numbers (take whatever they have in stock)
> 511-M48T02-20PC1
> 511-M48T02-15PC1
> 511-M48T02-12PC1
>
> There are complete instructions for installing a new NVRAM in the file
> nvram.info in
> ftp://ftp.wimsey.com/pub/crypto/sun-stuff/change-sun-hostid-1.6.1.tar.gz
> ftp://ftp.netcom.com/pub/he/henderso/change-sun-hostid-1.6.1.tar.gz
>
> The instructions for reprogramming the NVRAM are also much simpler
> because I've discovered a one line command to program the IDPROM info
> (no calculations of xors etc.) by decompiling the OpenPROM monitor.
> Over time, I've restored the NVRAM on about twenty machines (IPX,
> SS1, SS1+, IPC, SS2, 3/80).
>
> I eventually plan to turn nvram.info into a new improved NVRAM FAQ
> (I'm either not going to include the stuff about splicing the battery
> in, it isn't worth the effort for a $20 part, or just include it as
> an appendix), so I'd appreciate any feedback.
>
>
> --
> Mark Henderson -- markh@wimsey.bc.ca, henderso@netcom.com, mch@squirrel.com
> PGP 1024/C58015E3 fingerprint=21 F6 AF 2B 6A 8A 0B E1 A1 2A 2A 06 4A D5 92 46
> cryptography archive maintainer -- ftp://ftp.wimsey.com/pub/crypto
> ftp://ftp.wimsey.com/pub/crypto/sun-stuff/change-sun-hostid-1.6.1.tar.gz

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| Christopher L. Barnard O When I was a boy I was told that |
| cbarnard@cs.uchicago.edu / \ anybody could become president. |
| (312) 702-8850 O---O Now I'm beginning to believe it. |
| http://www.cs.uchicago.edu/~cbarnard --Clarence Darrow |
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