[rescue] Nice older equipment I got... a little input

[Kevin Loch]

Andrew Weiss wrote:
> I took 4 16MB sticks and 2 8 MB sticks from another Model 250 and replaced
> the 24MB that was in this unit... this is probably my mistake (is there
> some rule about interleaving?)
> 

Here's the LX memory info (from James' wonderfull reference)

        Memory consists of up to six SIMMs, in three pairs of 4M
        (501-1991) or 16M (501-2059) SIMMs. SIMM types may be mixed, and
        should be installed according to this table:

                       bank1   bank2   bank3   bank1   bank2   bank3
          total RAM    U0304   U0301   U0402   U0303   U0302   U0401
          ---------    -----   -----   -----   -----   -----   -----
             16M        4M      4M              4M      4M
             24M        4M      4M      4M      4M      4M      4M
             32M        16M                     16M
             40M     *  4M      16M             4M      16M
             48M     *  4M      4M      16M     4M      4M      16M
              or        16M     4M      4M      16M     4M      4M
             64M        16M     16M             16M     16M
             72M     *  4M      16M     16M     4M      16M     16M
             96M        16M     16M     16M     16M     16M     16M

        Rows marked with '*' do not work under SunOS 4.1.3c. "Put 16MB
        SIMMs in Bank 1."

Note that you can only use 4 or 16M simms.  I tried 32M and they
diddn't work.  72Pin PC simms *with parity* will work fine.

KL