Re: Memory

[Ola Olsson <oeolsson%tmisnet.com@localhost>]

On 03 Aug 98 06:58:53 -0500,
"J T Gill" <jtgill%mis.net@localhost> wrote about Memory:
> Today, I took the plunge, purchased two 8x32 60ns EDO simms for my
> warp engine equipped 4000.  Popped them in, and under Workbench, no problem,
> I had 96megs fast, 2 chip.  However, when booting into Netbsd, it only
> saw 80 (I assume because the other was non-contiguous) and it would
> lock up halfway through the initialization, right after it recognized
> my arcnet card.  I thought maybe it was some funky auto-config thing, so
> I took out the arcnet card, and it still does it.  ANy ideas?
>
> I have  A4000/040  40mhz warp engine
> 4 scsi harddrives attached, one tape drive, one cdrom
> 2 32 mb simms int he first two sockets (double sided)
> 2 16 mbsimms in the next two sockets (single sided)
>
> 2 mb Picasso II in the lowest zorro slot.  I have good ventilation and
> everything, so I don't think heat is the problem, although the manual for
> the WE suggests avoiding double sided simms because of high power consumption.
> It will boot fine with just the 2 32's in there.  Any help or ideas
> appreciated.
>
> BTW, If I understand the configuration file correctly, I can compile
a
> kernel to only use the first 64 megs of that chunk?   I am trying this.

I have the same setup as you but with 4 32-meg SIMMS and NetBSD 1.3.2
sees all 128 Megs. These are all double-sided SIMMS. I have to lie to
the Warp Engine to get them to show up as contiguous; that is, the
jumper settings were trial and error and not at all what is indicated
in the manual.

I know this doesn't help much but at least it shows it is possible.
One suggestion (that you probably already know); make sure that the
CPU has heat sink compound and the fan works well because the SCSI
chip sits right next to it. I've seen two Warp engines lose the SCSI
chip due to overheating by the CPU. The '040 chip is pretty hardy and
relatively indestructible but the SCSI chip is sensitive and is
destroyed easily.

Cheers,
Ola

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