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- Newsgroups: comp.sys.att
- Path: sparky!uunet!nwnexus!seanews!kopachuk!dcb
- From: dcb@kopachuk.uucp (David Breneman)
- Subject: Re: 72Mb restriction on 300?
- Message-ID: <1993Jan9.165602.1690@kopachuk.uucp>
- Organization: Tacoma Screw Products, Inc.
- References: <1993Jan7.205849.20182@nntpd.lkg.dec.com>
- Date: Sat, 9 Jan 1993 16:56:02 GMT
- Lines: 56
-
- In article <1993Jan7.205849.20182@nntpd.lkg.dec.com> pzl@remulak.unx.dec.com (Pete Lega) writes:
- > In the 3b2/FAQ it states:
- >
- >>Some early models of the 3B2/300 do not permit a 72MB hard drive to be
- >>added to the system board. The recognizing signs for this restriction
- >>are documented in the Maintenance Reference Manual on page 7-21, and
- >>3B2/300 owners should consult this information before starting this
- >>project.
- >
- > Can someone post a quick synopsis of what
- > the symptoms are?
-
- Well, I've got some time while the backup is running...
-
- In my edition on the manual (Issue 3, 305-395) this information is on
- page 2-24:
-
- ---------- Cut Here ----------
-
- *Compatibility*Issues* _____________________________________________
-
- _72_MB_Hard_Disk_
-
- When initially released, only 10 MB and 30 MB disks were supported on
- the 3B2 computer. A 72 MB hard disk became available at a later time.
- On the 3B2/300, the 72MB hard disk will not function with an early
- version of the system board. The following system boards allow the use
- of the 72 MB hard disk:
-
- * any ED system board
-
- * any CM190A system board with artmaster 6 (AM6)
-
- * a CM190A system board with AM5, series 27 or later
-
- The AM and series information is stamped on the outside edge of the
- system board near the memory board connectors. Refer to Figure 2-5
- and Figure 2-6 for diagrams of the two types of system boards.
-
- ---------- Cut Here ----------
-
- In looking at these illustrations, it appears that the one conspicuous
- difference between these boards is that the older type has a "CPU Module"
- with 6 chips on it (I've never seen one of these "in person" before, so
- I'm going from the drawing) whereas the newer version is the more
- familiar (to me) board with individual sockets for the CPU MMU and MAU,
- much like the boards in the Version 3 machines (500-and-up). Also, there
- is no provision for an XM soft-power connection on the old board.
-
- Hope this helps.
-
- --
- David Breneman Sys Admin, Tacoma Screw Products, Inc. | ____ ____ ____
- dcb@tacoma.uucp | SCREWIE the TSP CLOWN sez- | / /___ /___/
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