[HECnet] VAXstation 4000/60 parameter RAM?

[Jordi Guillaumes i Pons]

> El 27/08/2015, a les 20:53, Hans Vlems <hvlems at zonnet.nl> va escriure:
> 
> Did it remember ‎its bootdevice? If not then the battery is probably  gone. It may be replaced, but I've never taken the trouble.
> It did boot, right?
> Hans

The battery can’t be replaced by itself, since it is embedded in the TOY chip, which is a DS1287A. That chip is not made anymore, but there is a drop-in replacement (Maxim DS12887A) which can be obtained quite easyly. The datasheet is this one:

http://datasheets.maximintegrated.com/en/ds/DS12885-DS12C887A.pdf

Alternatively, it is posible to plug in another battery to the dead DS1287A:

http://www.mcamafia.de/mcapage0/dsrework.htm

I try to do it and failed, so I got some 12887 to keep my 4000’ running.