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- Path: sparky!uunet!gatech!destroyer!ncar!noao!amethyst!organpipe.uug.arizona.edu!afthree.as.arizona.edu!tom
- From: tom@afthree.as.arizona.edu (Thomas J. Trebisky)
- Newsgroups: comp.sys.m68k
- Subject: What is this thing???
- Message-ID: <1993Jan6.183258.1315@organpipe.uug.arizona.edu>
- Date: 6 Jan 93 18:32:58 GMT
- Sender: news@organpipe.uug.arizona.edu
- Organization: University of Arizona, Tucson, AZ
- Lines: 32
-
-
- At an auction recently, I purchased an interesting piece of equipment
- that some Motorola expert may be able to identify for me. It is a big
- card cage (takes two men to move) with about 20 slots holding cards roughly
- 2 by 2 feet in size. Manufactured by Motorola as a "memory subsystem"
- Slots are labeled (left to right):
-
- F E D C B A 9 8 7 6 5 4 3 2 1 0 ACC -- ECC USER+IO USER+IO USER
-
- Slots 9 thru 2 are occupied with RAM boards: MMS4311
- each has 1Meg of RAM in 64k by 1 dynamics
- each is 1/2 populated (could hold 2Meg)
- (or maybe it is 2Meg and could be 1Meg)
-
- ACC slot has a board with a 68A01 with RAM, ROM, and interface logic.
- ECC slot has a MMS4330 board
- USER+IO has a MMS3354 prototyping board
-
- It also has a front panel with a hex keypad, Moto part number MMS3823.
-
- Again, the crate and the MMSxxxx cards were made by Motorola.
-
- ----------------
-
- Surely, all this RAM was not bank switched for the poor little 68A01.
- What is this thing, anyone know?
- It is definitely not a VME or Versabus crate.
- --
- Tom Trebisky ttrebisky@as.arizona.edu
- "Did you know that 500,000 trees are consumed in America each week
- to produce our Sunday newspapers. Never mind recycling, why even
- take the paper?"
-