Synchronous device driver for SunOS

[Greg Onufer]

gerry at gallahad.Central.Sun.COM (/usr/local/name) writes:
>This was written by a hardware engineer after my request
>about a similer problem..

>-------------
>Refer to any of the Hardware Configuration Guides
> under the section heading "Serial Port Configuration and Speed".

> "The serial ports are programmed I/O devices (rather than DMA devices)
> and have only a three-character hardware buffer each although they
> support both high-speed output (up to 19.2 kbaud) and input (up to
> 9.6 kbaud)."

> This statement holds true for Sun-2, Sun-3, and Sun-4 and goes back
> as far as the Aug 1984 Config Guide and as current as the Nov 1989
> Config Guide.

And the glossies on the SparcStations say that you can perform
38.4kbaud on one port or 19.2kbaud on both ports.  One would hope
that the older Sun-4's and even the Sun-3's could do it as
well.

Cheers!greg