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- Path: sparky!uunet!beartrk!ceilidh!hijo-2!dnichols
- From: dnichols@ceilidh.beartrack.com (Don Nichols (DoN.))
- Newsgroups: comp.sys.3b1
- Subject: Re: Expantion board for 7300
- Message-ID: <1992Jul28.012157.3618@ceilidh.beartrack.com>
- Date: 28 Jul 92 01:21:57 GMT
- References: <COSC16TT.92Jul22005943@menudo.uh.edu> <1992Jul23.022322.6449@ceilidh.beartrack.com> <7525@public.BTR.COM>
- Distribution: usa
- Organization: D and D Data, Vienna Virginia
- Lines: 49
-
- In article <7525@public.BTR.COM> thad@public.BTR.COM (Thaddeus P. Floryan) writes:
- >In article <1992Jul23.022322.6449@ceilidh.beartrack.com> dnichols@ceilidh.beartrack.com (Don Nichols (DoN.)) writes:
-
- [ ... ]
-
- >I've actually seen a "real" Convergent extension card for the 3B1. From
- >my notes, it's the same width as all other cards (natch! :-) and it was
- >17-1/2" long, with one (each) of the funny connectors at end end, and bore
- >the part number "PCA D-60-00213-00 (C) 1984" on one side and
- >"PCB D-43-00213-00 REV.A 8/3/84" on the other side.
- >
- >If one has the connectors, it should be easy to make one; I've never really
- >had the need, and I really have doubts about the efficacy of running
- >unbuffered signals out that far and also placing such a tremendous amount
- >of stress on the connectors; think about it for a sec:
- >
- >
- > +--------------+
- > | |
- > | 3B1 chassis +------------------
- >________+--------------+_______ ^
- > ^ |
- > | extension card + expansion card
- >table/countertop
-
- I had hoped that they would have a support frame with card guides,
- and would screw firmly to the back of the CPU box, to take the stress off
- the connectors and the boards.
-
- >The expansion BOXES afford an easy method of accessing both sides of any
- >single card placed in the box since the card is "on-edge".
-
- Aha! Finally a *REASON* to get one. With ethernet, I haven't
- needed enough serial ports to overflow the basic card capacity of the main
- machine, and I haven't seen the expansion box, so I'd envisioned two rows of
- horizontal slots. Thanks!
-
- >The one problem with the expansion box/chassis is that RAM cards do not
- >function in it (nor do the EIA/RAM combo cards); everything else does
- >work just fine in it.
-
- One combo card, one 2K ram card, and the expander card, room for
- all else down below.
-
- --
- Donald Nichols (DoN.) | Voice (Days): (703) 704-2280 (Eves): (703) 938-4564
- D&D Data | Email: <dnichols@ceilidh.beartrack.com>
- I said it - no one else | <dnichols@ceilidh.aes.com>
- --- Black Holes are where God is dividing by zero ---
-