[SunRescue] 4/6xx capabilities?

[Bjrn Ramqvist]

James Lockwood wrote:
> 
> Actually, I just thought of something.  With 7 slots on the first P2
> segment you could in theory fit 3 memory boards and a CPU board since the
> extra slot space taken up by the boards doesn't interface electrically.  I
> don't know if there is any provision in the address lines to handle
> another board, but a 4/690 (or 4/660 even) with 3.5GB RAM would be quite a
> sight.

That would really be something.
I just thought of something too. I recently came across a second VME-RAM
board for 4/300 CPU's, which, atleast in theory, could crank it up to
192MB(memboard) + 192MB(memboard) + 32MB(onboard). Just a thought.
Actually I can't see any sort of memboard adressing like the 4/400's on
these boards, so practically it could work.

I actually tried filling one board with 3 rows (out of six) with 4MBs
and the other board filled (all six rows) with 1MBs, plus the onboard
32MB. I just put those straight into a 3/50 cage I had around, and
powered up.
The 7th (or was it the 8th?) LED was blinking happily, meaning it passed
the selftests. I didn't plug in any console by that time, so I have
absolutely no idea what the machine reported to the console.

If this works, with two memoryboards, I'd be more than happy to try out
your idea. Heh, putting a 3rd memory board into a x90 12-slot cardcage
and see what will happen. :-)
Imagine 576MB plus 32MB of RAM on a poor 3/300...

> > Pity they're only parity, so none of the 3/2xx flashing ECC lights. ;)
> 
> Agreed.

I totally agree.


	/Regards, Bjorn