Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!olivea!orc!inews!iwarp.intel.com!psueea!parsely!agora!billsey From: billsey@agora.uucp (Bill Seymour) Newsgroups: comp.sys.amiga.tech Subject: Re: Pointer needed on bi-direction parallel i/o Message-ID: <1990Sep7.173321.4731@agora.uucp> Date: 7 Sep 90 17:33:21 GMT References: <1990Aug29.202423.25341@agora.uucp> Organization: Open Communication Forum Lines: 45 In article dillon@overload.Berkeley.CA.US (Matthew Dillon) writes: :In article <1990Aug29.202423.25341@agora.uucp> billsey@agora.uucp (Bill Seymour) writes: :> :>Normally, you just jumper :>between select and acknowledge for two machines. : : Yes, exactly. I dunno how you would go about making such a cable, but : the connections are the same. Seems to be a simple enough task with ribbon cables. Build a gender changer type gizmo on one end that does the jumpering (maybe conversion between 1000 and 2000 parallel port at the same time) then hook each machine into a chained ribbon cable. Just like with SCSI. : I think Doug needs to add a few : additional options to NET: to support more than two amigas, setting : UNIT=2 will not work (it only checks 0, non-0 from what I understand) I, for one, will keep on bugging him. :-} Too bad he has to work for a living... He could get so much more PD done if he didn't... : Three amigas will probably work but likely 4 will be unreliable... one : would need to make a circuit board with real open collector drivers (use : the same spec as IEEE-488 for line loading). I'll have to start looking into this... Maybe I'll end up with a whole bunch of little circuit boards that hook to each machines parallel port... Gee, I could cenvert to fiber at the same time and allow for *long* networks. Put in things like switches to go between printer/network... :-} : -Matt : :> -Bill Seymour ...tektronix!reed!percival!agora!billsey : : Matthew Dillon dillon@Overload.Berkeley.CA.US : 891 Regal Rd. uunet.uu.net!overload!dillon : Berkeley, Ca. 94708 : USA -- -Bill Seymour ...tektronix!reed!percival!agora!billsey ============================================================================= Bejed, Inc. NES, Inc. Northwest Amiga Group At Home Sometimes (503) 281-8153 (503) 246-9311 (503) 656-7393 BBS (503) 640-0842