hurf@theory.TC.Cornell.EDU (Hurf Sheldon) (06/28/91)
We have a DN10000 with 64mb of 'low density' memory and
4 processors, and the 40plane graphics subsystem. When
we ordered it we had the choice of getting up to 128mb
of 'low density' memory or getting 64mb and later adding
up to 128mb of 'high density' memory.(for a total of 192mb)
As a consequence, I was under the impression we had room for
at least 64mb of 'low density' memory but when I went to add
a borrowed 64mb board there were no empty slots...
Could someone explain the memory configurations on the DN10k
for me?
thanks,
hurf
--
Hurf Sheldon Network: hurf@graphics.cornell.edu
Program of Computer Graphics Phone: 607 255 6713
580 Eng. Theory Center, Cornell University, Ithaca, N.Y. 14853 thompson@PAN.SSEC.HONEYWELL.COM (John Thompson) (06/28/91)
> We have a DN10000 with 64mb of 'low density' memory and > 4 processors, and the 40plane graphics subsystem. When > we ordered it we had the choice of getting up to 128mb > of 'low density' memory or getting 64mb and later adding > up to 128mb of 'high density' memory.(for a total of 192mb) > As a consequence, I was under the impression we had room for > at least 64mb of 'low density' memory but when I went to add > a borrowed 64mb board there were no empty slots... > > Could someone explain the memory configurations on the DN10k > for me? Well, I'll try. The DN10000 has a total of 8 X-bus slots that can get boards put in them. Each CPU takes up a slot, each RAM motherboard takes up 2 slots, and the 40 and 80 plane graphics systems takes up 1 and 2 slots (this is from the O/S release notes -- I've never had the graphics systems). Your system has 4 slots used up by CPUs, and at least 1 used up for the graphics. That leaves at most 3 slots available. Since RAM motherboards take up 2 slots, you can only have 1 in your machine, unless you remove CPU(s) or the graphics board. Each motherboard can hold 4 daughter-boards. These boards can be either 16MB or 64MB in size. The CONFIG program allows for 8 and 32 MB sizes as well (if I remember right), but I've never seen them exist. You apparently have 4 16MB boards, for 64 total. In order to get more total memory, you can either remove 1 or more other X-bus devices (see above), or you can buy the 64MB daughter boards. There might be a trade-up policy in effect, especially since HP/Apollo does realize that the DN10000 customers have been screwed. The only way I can see that you could get 192MB would be for the 32MB boards to exist, and that you were supposed to get 2x32, rather than 4x16. Then you could add 2x64 to get to the 192MB total. Incidentally, it might be that you didn't know how the RAM is added. Each mother board slides out, and holds (up to) 4 daughter boards. These boards are the only lousy thing about the DN10000 (IMHO). You actually need a torque wrench and special little connector-bars to add the memory. I assume that there's a good reason for this, but I don't know what it might be. Did you actually pull out the RAM board from your system? It'll be in the X-bus, which is the ~ 20" wide one on the right-hand side of the machine, as you face the front panel. Since all your other X-bus boards should take up one slot only, it should be easy to spot -- it's the one that takes up 2 slots. If you pull it out, you'll see some daughter-boards bolted on to it. It might be that you have 2x32, and you could add the 64MB. -- jt -- John Thompson Honeywell, SSEC Plymouth, MN 55441 thompson@pan.ssec.honeywell.com Avoid the rush -- Procrastinate Now!