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- Newsgroups: comp.sys.amiga.hardware
- Path: chronicle.mv.us.adobe.com!adobe!NewsWatcher!user
- From: spack@adobe.com (Scott Pack)
- Subject: Re: A3000 RAM questions
- Message-ID: <spack-1203961626340001@144.7.18.64>
- Sender: usenet@adobe.com (USENET NEWS)
- Organization: Adobe Systems Incorporated
- X-Newsreader: Value-Added NewsWatcher 2.0b24.0+
- References: <4hl59p$bfd@nntp1.best.com>
- Date: Tue, 12 Mar 1996 23:26:34 GMT
-
- In article <4hl59p$bfd@nntp1.best.com>, timmer@netbsd.warped.com (Timothy
- Aston) wrote:
-
- > I am planning on upgrading the RAM in my A3000 soon, however before I do
- > I have some questions, given that my configuration is a little on the odd
- > side...
- >
- > I currently have 6 MB of RAM in my A3000 (not T), 2 MB of chip RAM and 4
- > MB of fast. My fast RAM all comes from 1x4Mb DIPs (yes, DIPs) that fill
- > up my DIP fast RAM bank. This is not documented as being an option, but
- > it does in fact work just fine, except for the fact that I have to add
- > the NOCACHE option to SetPatch (although I can then do CPU CACHE and
- > things are OK, in fact I put that command right after SetPatch in my
- > Startup-Sequence). I have always wondered why this may be, but no one
- > has been able to give me a good answer yet.
- >
- > Anyways, that's sort of an side from my real questions.
- > - First of all, will 1x4Mb ZIPs work with these 1x4Mb DIPs?
- > - Secondly, is it not true that all the RAM chips must be of the same
- > type (static column, page mode, whatever)?
- > - Thirdly, I have no idea what type the RAM is that I have now, how can
- > I find out?
- >
- > If anyone could answer my questions, I would very much appreciate. As
- > you can surely understand, I am very eager to upgrade, 6 MB just isn't
- > much these days.
- >
- >
- > -Tim
-
- So all of your Zip ram banks are empty, right? The DIP bank is a mirror
- of the first 4Mb ZIP bank. The DIP bank was designed to hold 1x256 chips
- that were to be moved over to make the 2nd MB of chip RAM.
-
- ZIP memory addded to the first ZIP bank would be useless with the existing
- DIP 1X4's in place. I don't know if you could add ZIP memory to the 2nd,
- 3rd, and 4th ZIP banks AND have it work with the 1st bank (DIPs). You
- could try, hopefully the worst that would happen is that it wouldn't work
- and you would need to buy more ZIP's to fill the 1st bank.
-
- Conflicting stories here, but my experience is that the ZIPs don't need to
- be of the same type. However for speed purposes Static Column is slightly
- faster due to 030 processor design.
-
- The kind of RAM you have now is printed on the chips, it's a long number
- perhaps like 4400256-80. The dash number being the speed, in this case
- 80ns.
-
- -Scott
-