11 Nov
2007
11 Nov
'07
12:27 p.m.
On Nov 10, 2007, at 1:19 PM, Scott Quinn wrote:
Couple of questions on old Sun machines (well,
parts).
On a Sun 4300 CPU board, I'm getting the
"EEPROM Write-Write-Read-Read test
error PA=0xF2000000 VA=0X00FF8000 Exp=0x0000005a Obs=0x00000000
(looping)"
error. Looking on the Web and Usenet seems to show that this has
happened a couple of times, with some reference to possibly being
the NVRAM (although the most comprehensive posing set was in
German :(). This seems a bit odd, though - on my other Suns it
calls the NVRAM the NVRAM, so I'm wondering if this is something else.
It's just a terminological difference. Most of those machines (if
I recall correctly) used 2816 NVRAM chips, which are also correctly
referred to as EEPROMs.
J1900 1-2 is connected (4MB SIMM option), so it
shouldn't be that
(or is there something else needed to be done- not sure if this is
a 4/330, or if there is any board-level reason that it couldn't use
4MB SIMMS).
They need to be parity SIMMs and they need to be fast
enough...once you've set that jumper you should be good to go. Some
of the machines (I don't recall which) have more than one jumper for
SIMM size, though, so be careful of that. Do you have a Sun FE
handbook handy?
Another question- so far I have had two Sun-3 era
machines (a
Carrera CPU in a CADDstation and a Sun 3/200 CPU) develop "all
lights on" catatonia. Is this a common problem with Sun-3s? I'm
wondering if I should take the time to trace out the 3/200 board
(preferably with hints on where to look), give it away, or junk it
(I have a working 3/110 system, so I won't be destitute of Sun-3s).
Not common at all...I have run literally hundreds of Sun-3 systems
and have *never* seen that failure mode. I wonder what's going on
there.
I'd say repair it if you can; they are starting to dry up.
-Dave
--
Dave McGuire
Port Charlotte, FL
Farewell Ophelia, 9/22/1991 - 7/25/2007