From: John DeGroof
Subject: Re: help stacking RAM
Organization: The Solar System [earth.ss.org]
X-Newsreader: Forte Agent 1.8/32.553
Date: Sat, 26 Oct 2002 00:24:15 GMT
NNTP-Posting-Date: Fri, 25 Oct 2002 17:24:15 PDT
On Fri, 25 Oct 2002 16:26:28 -0600, Sylvan Butler
>Of course it cannot be pin-for-pin, because the 2x storage increase
>requires an additional address line.
True, but there are unused pins on that chip, and there are traces on
the board. I'm still investigating if it's really set up to handle
>Or how will you select which bank of memory?
>Once you solve that,
Yeah, I have to figure that part out. The firmware is still being
reverse engineered (still not 100%), and as of yesterday, it looks
like the MMU is programmed with a table to access two banks of 4MB
each, thus the 8MB chip.
>but physical size might be an issue.
A hard drive lives on top of the board, and due to the fact that the
drive edges are lower than the underside electronics, I think it'd
either just fit or need a slightly taller washer, using room between
the top of the drive and the case.
>Do the chips generate any noticable heat?
They don't but the hard drive that sits on top of them does. I know
what you're referring to however, and the chip doesn't generate any
heat of it's own.
Thanks for the reply btw... As this project progresses, it's looking
less promising and more difficult than originally thought. If I could
make money by modding other peoples players, it'd be worth it, but
since it involves reverse engineering firmware, that'd be a problem.
John DeGroof, Compressionist
DVD, DAD, DVD Audio, MPEG, AC3, DTS, PCM, DSD, MLP