gijoe77 wrote:hey now what's this? Would you mind posting some pics of this if you actually do it? Would be interesting to know what this mod is all about
A couple of years ago someone put a bunch of Dallas chips lifted from various SGI systems in an xray machine for me. The result looks like this (I don't know right now which one we're looking at here):
See, if you simply start grinding away at a Dallas, it'll look like this once you're finished (sorry Pentium)
But if you know where the battery leads are, the procedure takes less time and the finished result looks better:
This Indigo2 is continuously complaining about kernel dates in the future, so it's Dallas battery is dead. It also seems to cycle through some weird screen modes during boot so either the Solid Impact card is shot or the configuration is scrambled. I'm not sure what's happening here; when starting X it momentarily switches to 72Hz and then when it goes back to 60Hz the brightness is way up and colors on screen look all washed out. It takes a 'setmon 1280x1024_60' from inside a desktop session to restore a normal picture on screen even though it's running at 1280x1024@60 already.
FWIW: the Indigo2 has a small EEPROM on the riser card on the back of the chassis where the keyboard, mouse and serial ports are. At the very least this contains the system MAC address, so the system ID is tied to the chassis, not the main board. And the MAC address remains valid when the Dallas battery dies, unlike in an Indy. I do not know which PROM variables are stored in the EEPROM and which are stored in the Dallas battery backed RAM.