Classic Computer Auctions List

From: Hans Franke <Hans.Franke_at_mch20.sbs.de>
Date: Wed Jan 27 10:13:31 1999

> > > And you'll end up with a ring architecture, since if I remember correctly,
> > > each drive only had two IO ports on it. That is, if you don't hack some
> > > hardware to get a parallel connection to each computer (like 10BaseT hubs
> > > today). And you'll need to select your problem domain to complement the
> > > speed issues you'll have in communication, or you may end up with something
> > > that's slower than a single C-64.

> Other topologies are possible including serial bus and star with trivial
> to none in the way of hardware to do it.

Jep, and wait and see .)

> The easiest using a few disods and resistor is a serial bus that runs
> CSMA/CD. If that sounds familiar lookup IEEE802.5...

:))

> Anyhow I"ve done this before and the trick is to make the transmitter look
> like an open collector (takes one diode) so that RXand TX for every node
> can be on the bus (coax or twisted pair with pull up or down resistor).
> Collision detection and carrier sense are via spare port bit (or CTS RTS
> lines). I've run such a bus at speeds up to 115kb/S and even 9600baud
> it's very useful.

Shure, as I said, a shared media eliminates the switching.
But 115 kb/s is still high for a C64 .... lets see.

Gruss
H.


--
Ich denke, also bin ich, also gut
HRK
Received on Wed Jan 27 1999 - 10:13:31 GMT

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