Subject: Re: CG6 and serial port support questions
To: None <>
From: Geert Bosch <>
List: port-sun3
Date: 03/05/1996 01:44:37
On Mon,  4 Mar 96 15:35:20 -0500 you wrote:

>2) The serial ports have a top speed of 19200 baud.  My understanding was
>that the hardware in the 3/60's could support 38400, but it was a function
>of SunOS that limited the port to 19200.  

That's not completely true. The limit of the hardware is 76800 baud, but
SunOS limits it to 38400. I'm using 38400 over here with no problems whatsoever
on my Sun 3/60. The Sun serves as a gateway between the internet and our LAN,
using a socks server and a name-server to make everything work with 1 IP address.
Even when several people are transferring files, the CPU-load keeps low and the
throughput comes close to the maximum of the SL/IP connection we have.

As far as I know NetBSD also supports 38400, but there were some recent patches
because there were some bugs introduced not so long ago. You might want to check
the archives of this list for more information.

(I recall you could set the serial portspeed in the boot prom manager, 
 but that SunOS then proceeded to ignore this).

This is true, SunOS pretty much ignores everything in the NVRAM. It would be
ridiculous to have to set portspeed etc. in NV-RAM for anything but the
console, IMHO. Change the NVRAM and reboot for a change in the portspeed? ;-)