Yeah, I thought that was flash or something...but from that long ago, maybe
it's one of the early EAROM chips.

  Wait, I seem to remember that some RTC chips have a few dozen bytes of
generic battery-backed RAM on 'em...The RTC on the 4/100 is an Intersil
7170...anybody have an Intersil databook handy?

                   -Dave McGuire

On Wed, 04 Nov 1998, Matthew Jacob wrote:
>Oh, yeah- well- these parts are the same as what was on the sun3s I
>believe- they get blown in a burner (this was for the IDPROM)- but 
>I think there must have been some kind of writable storage somewhere
>if there's a PROM password...
>
>On Wed, 4 Nov 1998, Dave McGuire wrote:
>
>> On Wed, 04 Nov 1998, Matthew Jacob wrote:
>> >>   Oh jeeze.  If 20-year-old VAX documentation is readily available, 4/100 stuff
>> >> should be all over the place.  It's not *that* old.
>> >
>> >It didn't sell as many units as VAX.
>> 
>>   Well, ok, you've got a point there. :)
>> 
>>   I just looked at a 4/100 board here...I believe the NVRAM on that board is a
>> SEEQ 2816 chip...right next to the Intersil RTC chip.  Mine is soldered.  Bad
>> news.
>> 
>>                -Dave McGuire
>>