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- Newsgroups: comp.protocols.tcp-ip.ibmpc
- Path: sparky!uunet!destroyer!sol.ctr.columbia.edu!The-Star.honeywell.com!saifr00.cfsat.honeywell.com!troyer
- From: troyer@saifr00.cfsat.honeywell.com (Dean Troyer)
- Subject: Re: 3C503 settings?
- Message-ID: <1992Nov7.022055.7937@saifr00.cfsat.honeywell.com>
- Organization: Honeywell Air Transport Systems Division
- References: <BxBFLF.1yt@unx.sas.com>
- Date: Sat, 7 Nov 92 02:20:55 GMT
- Lines: 64
-
- In article <BxBFLF.1yt@unx.sas.com> sastdr@torpid.unx.sas.com (Thomas David Rivers) writes:
- >
- >Ok -
- >
- > I just inherited a (supposedly working) 3C503 card - with no documentation.
- >(Ah, those "fire sales").
- >
- > So, if someone could either:
- >
- > 1) Point me to the address/phone number of 3-com so I can
- > get some doc - or -
-
- My Etherlink II (3C503) book lists 1-800-NET-3COM for support services.
-
- > 2) Be kind enough to draw a picture of the card/jumpers, etc...
- > (Most items are easy for me to figure out, i.e. the
- > jumpers labeled 2 3 4 5 6 7 with INTERRUPT written above it
- > is obviously the IRQ number. The BNC selection jumpers
- > have a little picture of a BNC connector. What I'm
- > really curious about are the jumpers labeled:
- > I/O ADDR and DMA.
-
- I hate to break this to you, but none of the 503's that I've seen have jumpers
- for the DIX/BNC connector nor interrupt jumpers. I think you have a 3C501
- on your hands. To boot, there are at least 2 layouts for the 501; from your
- description of the DIX/BNC jumpers, I'd guess you have one like the
- ASSY 1221-01 that I have in front of me.
-
- -----------------------------------------------------|
- | ....... |
- | I/O MEM EN ::::::: -|
- | ...... . | DIX
- | :::::: : |
- | -|
- | ........ |
- | :::::::: |
- | MEM --| BNC
- | --|
- | IRQ :::::::::::: |
- -------------------------| DMA |---
- |------------------------|
-
- The I/O jumpers select the I/O port address: the numbers are the bits in the
- address word: read right to left, with a jumper on the top 2 pins a 1 and on
- the bottom two pins a 0. The single jumper to the right of the I/O jumpers
- is the memory enable/disable; top two pins is enabled. If you enable the
- memory, the MEM jumpers set the memory's segment address; read the like the
- I/O jumpers. The DMA jumpers select the DMA channel used (if the software
- does DMA; most don't). All of my cards are set to DMA channel 1.
-
- > Thanks -
- >
- > - Dave Rivers -
- > (rivers@ponds.uucp (home))
- > (sastdr@unx.sas.com (work))
- >--
- >UPDATE ALL INFORMATION AND POD INTO COSMOS - Federal Express
-
-
- --
- Dean Troyer troyer@saifr00.cfsat.Honeywell.COM
- Honeywell Commercial Flight Systems 72240.3152@compuserve.com
- Phoenix AZ
- (602) 436-3613
-