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- Newsgroups: comp.sys.zenith
- Path: sparky!uunet!europa.asd.contel.com!darwin.sura.net!jvnc.net!yale.edu!yale!gumby!news.cs.andrews.edu!zds-oem!crean
- From: crean@zds-oem.zds.com (Pat Crean)
- Subject: Re: 4 MB SIMMs in 386/25 motherboard
- Organization: Zenith Data Systems, OEM Systems Engineering
- Distribution: na
- Date: Tue, 01 Sep 1992 14:27:44 GMT
- Message-ID: <1992Sep01.142744.17430@zds-oem.zds.com>
- Keywords: 4MB SIMMs, 386/25, upgrade
- References: <1992Aug31.211644.27931@u.washington.edu>
- Lines: 34
-
- In article <1992Aug31.211644.27931@u.washington.edu> djo7613@hardy.u.washington.edu (Dick O'Connor) writes:
- >I wanted to add 4 MB of memory to a Z386/33 EISA machine, so I bought a
- >4MB SIMM (ZA3800MK) from LA Trade and it worked. I wanted to add 4 MB
- >of memory to a Z386/25, so I bought the same piece and it worked. Great!
- >
- >Now I want to add 4 MB to a Z386/25 that came from a Z286 with the Hug
- >386/25 motherboard upgrade added. But that same piece isn't recognized
- >by this machine. In fact, we upgraded two machines in this way, and
- >neither of two distinct pieces (SIMMs) are recognized by either machine.
- >
- >I smell an incompatibility problem. Or a jumper I don't know about? The
- >hardware manual included with the upgrade just says to put either 1MB or
- >4MB SIMMs in the first open slot. No help there. Has anyone figured out
- >how to do this properly or have any further info that might help?
- >
- >"Moby" Dick O'Connor djo7613@u.washington.edu
- >Washington Department of Fisheries *I brake for salmonids*
- >--
-
-
- Do you already have 4MB of 1MB SIMMs installed on this motherboard?
- On early Z386/25s you must install a 1 MB SIMM in the first SIMM socket
- as 4MB SIMMs don't work there. Then, since 4MB parts must be addressed
- on 4Meg boundaries, you must fill out the bottom 4MB of memory space with
- 1MB parts.
-
- Pat
-
-
- --
- Pat Crean Zenith Data Systems
- Systems Engineer
- crean%zds-oem@caspian.cs.andrews.edu
-
-