Re: Max. memory on 164LX

[Juhana Helovuo <juhe iki fi>]

axp-list-request redhat com kirjoitti:
> Date: Mon, 28 Apr 2008 14:44:13 +0900 (JST) From: Kazuyoshi Furutaka <furutaka jb3 so-net ne jp> Subject: Max. memory on 164LX (Re: SELINUX etc.) To: axp-list redhat com Message-ID: <20080428 144413 531529872 furutaka jb3 so-net ne jp> Content-Type: Text/Plain; charset=utf-8 Hi all, From: Kazuyoshi Furutaka <furutaka jb3 so-net ne jp> Subject: SELINUX etc. (Re: Fedora 8-based distro for Alpha CD Announcement) Date: Thu, 24 Apr 2008 21:16:06 +0900 (JST)
> > > 3. How much memory can be installed in 164LX machines?
> > >    I have two 164LX machines, one with 512MB (Debian etch)
> > >    and the other with 384MB (the Fedora-8 based), and I'd
> > >    like to have more memory capacity if possible.
>
> From: Jay Estabrook <Jay Estabrook hp com>
> Subject: Re: SELINUX etc. (Re: Fedora 8-based distro for Alpha CD Announcement)
> Date: Thu, 24 Apr 2008 09:00:01 -0400
>
> > > 3. I think the max was 1GB total, 256MB per DIMM.
>
> Thanks Jay.
>
> According to a product brief from Alpha Processor Inc. of
> the motherboard (attached to this mail), the maximum
> is 1GB, but it's the only one that says so.
> (www.alphalinux.org/firmware/api/LX/164LX.PDF)
>
> "Digital Semiconductor AlphaPC 164LX Motherboard Product
> Brief" which is found on
>   http://h18002.www1.hp.com/alphaserver/technology/chip-docs.html,
> as well as "AlphaPC 164LX Motherboard Technical Reference Manual"
> (EC–R46WC–TE) found on the same page, on the contrary, says
> "up to 512MB", and I'm wondering which is correct.
>
> I got 4 256MB memory which will be delivered in a few days,
> and I'll experiment using them.

Hello,

I can confirm that *some* 256MB ECC memory modules work on 164LX, but 
some do not. The 256MB memory modules should be as follows:

* (SDR) SDRAM DIMM
* width 72 bits (i.e. ECC capable)
* not buffered / not registered
* max clock rate of 100 MHz is sufficient, higher should be ok
* each DIMM has 18 chips of 128 Mbits
* each chip organized as 16M addresses x 8 bits

As specific examples that I have tested:

* Kingston KVR100X72C2/256 works ok.
* Kingston KVR133X72C3/256 does not work, due to wrong layout.


Best regards,
Juhana Helovuo