What is the best Ram upgrade?

Rooster · April 24, 2006, 06:16:21 PM

What kind of RAM should I be looking for to expand to 32meg?
Parity, Non-Parity?
60NS?

Sorry for thre newbie questions but I'd like to load this Dimension card to its peak upgrade.

gtnicol · April 24, 2006, 10:15:58 PM

4mb 72 pin FPM memory, 80ns or less.

FWIW. I've tried 8mb as well.

Andreas · April 25, 2006, 02:24:33 PM

Quote from: "gtnicol"
FWIW. I've tried 8mb as well.

and with this you can expand to 64MB.

brams · April 26, 2006, 08:08:43 AM

Quote from: "Andreas"and with this you can expand to 64MB.

I've though about this as mine as 32mb, but does it actually make any difference to anything?

gtnicol · April 26, 2006, 02:09:40 PM

My experience has been that it makes some things faster... video display for example.

Rooster · May 06, 2006, 12:01:24 PM

Quote from: "gtnicol"4mb 72 pin FPM memory, 80ns or less.

FWIW. I've tried 8mb as well.

Do you have fill all the slots?
or is it possible to say add 4 X 8 meg chips?

andreas_g · June 01, 2018, 08:36:40 AM

I have a question that possibly fits here. It concerns emulation and therefore i also posted it here.

As i read from this thread it is definitely possible to run a NeXTdimension board with 64 MB of RAM. The emulator (Previous) also supports up to 64 MB. But there seems to be a timing problem using that much memory. The power-on memory test of the NeXTdimension takes too long so that the 68k CPU board does not see a ready NeXTdimension board on start-up.

It is not a big problem, but this causes the ROM Monitor and boot animation to not show up on the NeXTdimension screen, even if configured to do so.

So now my question is: Did someone experience this problem also on a real NeXTdimension board with memory sizes beyond 32 MB?

chrisrot · June 01, 2018, 02:29:37 PM

My dimension has 48 MB and works without obvious problems.

andreas_g · June 01, 2018, 04:48:42 PM

Quote from: "chrisrot"My dimension has 48 MB and works without obvious problems.

Just to be sure: You see the boot screen (animated icon or message log) on the NeXTdimension color screen?

chrisrot · June 02, 2018, 05:51:38 AM

ok, sorry, I think I misunderstood you.
I see the boot console on the B&w screen. I only get a picture on the dimension after its server is started.

andreas_g · June 02, 2018, 06:03:34 AM

Thank you for checking! This is interesting. Do you know how your screens are configured in the multiple screen preferences? Is the login screen icon on the Dimension or on B&W?

chrisrot · June 02, 2018, 07:02:07 AM

The login promt is on the dimension screen, on the b&w the boot log remains.
I think i configured it to use only the dimension screen, but i have to check.
btw it's NS3.3

andreas_g · June 03, 2018, 02:22:51 AM

Very interesting! This matches the behavior on the emulator when using 48 MB of memory (Clarification: In case you set the Dimension to be your main display in the preferences). If I reduce memory on the Dimension to 32 MB or less the boot log is shown on the Dimension screen.

chrisrot · June 10, 2018, 02:56:34 AM

In preference the dimension is set On, the megapixel is set to off.
When I turn both on the boot screen is still on the b&w display but disapears when the login promt is displayed.

andreas_g · June 10, 2018, 03:06:06 AM

Thank you for checking! I think this ultimately confirms that there is a timing bug in the ROM causing that Dimension boards with more than 32 MB RAM are not detected by the ROM.