[Info-vax] Request for AlphaServer 1000A SIMM/SIMMS

[Hans Vlems]

On 7 jul, 14:36, urbancamo <m... at wickensonline.co.uk> wrote:
> Thought I was going mad, but I'm not.
> According to the AS1000A Service Guide Bank 0 must contain a memory
> option (the lowest bank in the diagram). However, I've found that the
> machine won't boot without Bank 3 being populated. Note also that it
> specifies five SIMMs  as required. However, when I got the machine it
> had Banks 3-1 populated with no SIMMs in the ECC bank.
>
> He's the blurb from the manual:
>
> 6.2.7 Memory Modules
> The positions of the failing single-inline memory modules (SIMMs) are
> reported
> by SROM power-up scripts (Section 2.2).
> Note
> • Bank 0 must contain a memory option (5 SIMMs–0, 1, 2, 3, and 1
>      ECC SIMM).
> • A memory option consists of five SIMMs (0, 1, 2, 3 and 1 ECC SIMM
>      for the bank).
> • All SIMMs within a bank must be of the same capacity.

Mark,
you wrote earlier that the corresponding ECC slots are empty. I
translated that to: they haven't been used by you at any time.
If so, what happens if you populate bank 0 and ECO slot 0 and nothing
else?
There are two reason for this question:
- if you're running a system outside its configuration guidelines then
expect to see weird behaviour (faultless operation for a system that
obviously violates configuration rules is also weird behaviour IMO).
- The ECC option is there for a reason, the memory errors reported
while booting the system might have been corrected without you ever
noticing
Hans