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- Xref: sparky comp.sys.apple2:26444 comp.sys.mac.hardware:25367
- Path: sparky!uunet!gatech!emory!wupost!waikato.ac.nz!comp.vuw.ac.nz!actrix!David.Empson
- Newsgroups: comp.sys.apple2,comp.sys.mac.hardware
- Subject: Re: One keyboard for 2 computers
- Message-ID: <1993Jan6.074142.14568@actrix.gen.nz>
- From: David.Empson@bbs.actrix.gen.nz
- Date: Wed, 6 Jan 1993 07:41:42 GMT
- Sender: David.Empson@actrix.gen.nz (David Empson)
- References: <1993Jan5.184359.18595@src.honeywell.com> <1993Jan5.203139.13991@zip.eecs.umich.edu>
- Organization: Actrix Information Exchange
- Lines: 30
-
- In article <1993Jan5.203139.13991@zip.eecs.umich.edu> grover@emunix.emich.edu (Grover Thomas) writes:
- > In article <1993Jan5.184359.18595@src.honeywell.com> shankar@src.honeywell.com (Subash Shankar) writes:
- > >
- > >I have a Mac IIci and an Apple IIGS (please, no computer flames), which both
- > >use ADB keyboards. To clear up desk space, is there any way of using the
- > >same keyboard for both computers? Surely, somebody else has a similar
- > >problem?
- >
- > While I have never tried this, I have heard that connecting two machines
- > to the same keyboard is a great way to burn out either your keyboard,
- > or the ADB controller chips inside the computers.
-
- The keyboard should be OK, but the computers wouldn't.
-
- > Perhaps you are looking for an 'A-B switch box' kind of connection. That
- > way you can use one keyboard and mouse, and use it between the two
- > computers with a quick turn of a knob.
-
- Not a good idea. A-B switch boxes are fine for serial connections,
- but ADB also supplies power to the peripherals. It isn't designed to
- have devices being connected and disconnected while the power is on
- (which is effectively what you do when you switch the device over).
-
- Apart from power, the computer might not like having a keyboard appear
- or disappear suddenly (from a protocol point of view).
- --
- David Empson
-
- Internet: David.Empson@bbs.actrix.gen.nz EMPSON_D@kosmos.wcc.govt.nz
- Snail mail: P.O. Box 27-103, Wellington, New Zealand
-