[SunHELP] NVRAM weirdness

[bran tregare]

if the NVRAM chip is socketed, reboot with the chip out, then when it comes 
up to the OBP, plug the NVRAM chip back in and reset it to defaults.

-However- it is possible to trash the nvram while doing this.  I thought I 
should warn you.

At 03:15 PM 2/7/02 -0500, you wrote:
>Hello all-
>         I wrote in a couple of weeks ago about the Kodak Image Magic PS4 (aka
>Sun Ultra 5) that I had but that I couldn't boot anything other than the
>Kodak HDD. I ordered a new PROM/NVRAM/whatever chip from Mouser and I
>installed it today, and following the directions from the PROM
>reprogramming page I was able to successfully reprogram the new PROM.
>         Weird thing is, I was about to do a Debian install, booting via 
> TFTP. I
>had the original Kodak disk drive in there and it booted off that before
>I could get into OpenBOOT. It flashed something about Solaris 5.5 on the
>screen before it reset the machine. Now my new PROM is exhibiting the
>same symptoms as the old PROM... i.e. I can no longer get into the
>OpenBOOT menu, it simply says "Initializing... Please Wait..." when it
>is booting. Then it won't do a thing unless the original drive is hooked
>up.
>         I was careful to reset the PROM write-protect jumper after 
> programming
>my new PROM, but the KODAK software has somehow managed to munge my
>brand new PROM even with it write-protected!  Anyone have any idea how
>to reverse this/short the PROM so that I can reprogram it again? Or am I
>going to have to shell out another $25 bux and wait another 2 weeks for
>yet another new PROM from Mouser?
>
>Thanks again,
>Zack
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