tom@LOGICON.ARPA (09/19/84)
From: Tom Perrine <tom@LOGICON.ARPA> Is anyone out there running a NSC HYPERchannel net with UN*X on a PDP-11 or other DEC equipment? I am looking for just about *any* kind of info on the HYPERchannel. Please send replies directly to me, I will summarize to the net if there is any other interest. Thanks in advance, Tom Perrine Logicon - OSD San Diego, CA
StJohns@MIT-MULTICS.ARPA (09/25/84)
From: Mike StJohns <StJohns@MIT-MULTICS.ARPA> What type of things don't you like about the Hyperchannel? Overhead? System load impact? What do you think the advantages of the Ethernet are vs the Hyperchannel? The Air Force Teleprocessing Services Center at the Pentagon is running a TCP Hyperchannel network between 4 Multics computer systems. Its reasonably efficient from our point of view. Mike StJohns (StJohns@MIT-MULTICS.ARPA) (Actually, the above line should read "from their point of view" as I Left there a month ago.)
gottloeb@trwrba.UUCP (Jeff R. Gottloeb) (09/25/84)
> From: Creon Levit <creon@ames-nas-gw.arpa> > We run the HYPERchannel on our vax 780s under 4.2bsd. The driver > (network interface) we use is an update of the 4.2 distribution that > was supplied by the original's author, Steve Glaser, at Tektronix. I > have fixed it so that is allows "raw" access to the hyperchannel, in > addition to tcp/ip access. We use it to talk between vaxes and to talk > to our crays. I also have a pdp-11 hyperchannel driver ans a vax > system V hyperchannel driver. I would not recommend hyperchannels > unless you absolutelt need to talk to machines that dont have ethernet > (i.e. Crays, CDC Cybers, IBMs, etc.) CDC has announced a distributed front-end communications network supporting terminals and gateways to other networks such as Ethernet. Initial release is scheduled for 2Q85 with subsequent releases at six month intervals.
ron@BRL-TGR.ARPA (09/26/84)
From: Ron Natalie <ron@BRL-TGR.ARPA> Our HYPERchannel has the annoying habit of dropping itself off line after a power failure and you have to go kick the adapters to get it to come back on. The one good thing about ethernet is that it is passive, and more people support it. No that's two things. The two good things are that it's passive, more people support it, and it's cheaper. No that's three... I'm going with Proteon, I think. Ethernet ain't so great either. -Ron
jbn@wdl1.UUCP (jbn ) (09/27/84)
The reason you don't want a Hyperchannel is that they cost about $40,000 each, plus a large monthly maintenance charge. Each Hyperchannel unit is almost a cubic foot of wire-wrapped electronics; this is not cheap.