Newsgroups: comp.sys.transputer
From: teig@autro1.UUCP (Oyvind Teig)
Subject: Re:Adding serial ports to a transputer
Organization: Autronica A/S, Trondheim, Norway
Date: 13 Sep 94 06:21:19 GMT
Message-ID: <178@autro1.UUCP>

Subject: Re:Adding Serial ports to a T800
frank@bnkl01astro.ucla.edu (Frank Henriquez) writes:

> My questions:
>   1) Are there DUART chips that are fast enough to handle the transputer
> bus speeds without all the extra wait state circuitry? any examples?

We did a design 4 years ago with 2 68681 controlled via a C011, even
without the use of a PAL (but quite some glue-logic)! It works at full
speed = (4 * 9600) at simultaneous Rx and Tx on all channels.

>   2) is there any sample Occam code for a softweare UART?
I asked about the realizability of this a few months ago - and got some
good answers from people - (Thanks to all of you!). It came out that this
                           -----------------------
was possible, people have done it, and I'm doing it now. My reason for
doing it is that I want non-destructive baud-rate detection - which
adds complexity. That's why I didn't ask for code. But it is rather simple,
but you must remember to make it High Pri.

Cheers, 0yvind Teig
Autronica

