Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!uunet!math.fu-berlin.de!opal!stewe
From: stewe@opal.cs.tu-berlin.de (Stephan Wenger)
Newsgroups: comp.sys.transputer
Subject: Re: host/transputer link speeds?
Summary: 1 MByte/s is possible
Message-ID: <3589@kraftbus.cs.tu-berlin.de>
Date: 5 Jun 91 13:29:45 GMT
References: <1991Jun4.133704.21008@cmcl2.nyu.edu> <16425@ganymede.inmos.co.uk>
Followup-To: comp.sys.transputer
Distribution: world
Organization: Technical University of Berlin, Germany
Lines: 24

In article <1991Jun4.133704.21008@cmcl2.nyu.edu> dimitrov@lab.ultra.nyu.edu (Isaac Dimitrovsky) writes:
>
>[]
>Does anyone know what the fastest link you can get between a PC host
>and a transputer on a board is? I was under the impression that it
>was 300Kbytes/sec, which is too slow for us. If we could get up around
>two Mbytes/sec, transputers would look very interesting for our
>application (it involves real time video compression).

It is possible to build a link-interface for the AT-Bus, which easily
realizes a overall bandwith (unidirectional) of more than one MB/s.
We have build such a thing around a C011 link-adaptor and two
IDT 7204 4096x9 bit hardware Fifos. The biggest problem was, that you
have to build a 16-bit AT interface, since the 8 bit XT interface is
too slow.
With this design we realize about 1.2 MB/s transfer rate between two
of this adaptors. We have never connected it to a transputer, but i
think, that the transputer would not be the bottleneck.
Yours Stephan Wenger
stewe@opal   stewe@tub