Ronald G Minnich wrote:
I have been having trouble getting PII to work with memory from powerup. I
just now realized that I'm seeing basically the same problem on the Intel
and SiS motherboards. Engineers at SiS, using the same linuxbios romimage
as I am using, has no troubles on the motherboard BUT: they are using
Celeron. (see the linuxbios web page: I can still get the intel
motherboard up with linuxbios, but I have to let the flash recovery code
run first by twiddling the jumper).
Sorry, Ron, but you probably got some misunderstanding of the situation here SiS.
We are using PII processors as you (??) but the M/B are different. The M/B send
to you was made by some infamous OEM, an the M/B tested here was what the real
"demo board" made in-house.
The symptom is that during memory init, at some point
the processor seems
to take a trap during a memory write. It is as though some piece of
hardware between the processor and memory is unhappy :-)
I'm working with SiS to try a different motherboard. But: I'm now
wondering if I'm encountering some kind of PII L2 Cache init problem on
the Slot 1 cards I'm using here. I'm very suspicious that I'm seeing a
particular kind of problem on my Slot 1 PII systems that SiS is not seeing
using a Celeron, and that I'm seeing the same kind of problem on both
Intel and SiS mainboards.
Any comments on this? Any thoughts? Anyone know if anything special
happens for L2 cache on a Slot 1 card at powerup? It would probably look
like an IN or OUT to an undocumented address (undocumented since this is
Intel we're talking about here).
We can reach some point in intel_main.c on our M/B with all DRAM correctly
sized/detected, so it probably not an undocumented CPU thing but an undocumentd,
screw-up M/B thing.
Anyway, we will send you the M/B with DIMM we are testing to you, of course,
the flash rom and the romimage "pre-installed" too.
After that we will purchase TWO identical M/B made by LeadTek (WinFast 6300MA),
DIMM, flash rom, one for each of us. The M/B is only avaliable in Socket 370,
so we are asking you if it is O.K.
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