Decstation 3100 doesn't recognise 3rd party memory.

[Scott Milton]

Dear Net.users,

Problem: DECStation 3100 does not recognise extra 16MB of third party memory.

Details: Memory is "Dataram", purchased from a local supplier "Kairinsky".
         The DECStation originally had 8MB of memory, and now has 24MB.
	 Useful diagnostics are:
		>>> test -c
			MEM 24Mbytes
		>>> auto
			loading rz(0,0,0)vmunix
			Ultrix Workstation V2.1 (Rev. 14) System #4 ...
			real mem  8388608
			avail mem 5558272
	I've tried a few bizarre things, such as reconfiguring the kernel,
	using the kernel from a 16MB machine, booting off another disk which
	serves a 16MB machine, and the result is the same.

	I've also run a thrashing program (random accessing a configurably large
	memory array) to test how much memory is being used, and verified that
	the machine is actually only using 8MB.

	Some of the old Suns needed to have their eeprom values changed when
	more memory was added, but this in not in the manuals, and nobody
	I've talked to locally thinks this is likely.

	Any suggestions, however slight would be appreciated,

Thanks for your time,
-- 
Scott.Milton at csis.dit.csiro.au     Phone +61-6-2750923     Fax +61-6-2571052
CSIRO Division of Information Technology, ANU, Acton Canberra ACT AUSTRALIA.