[Soekris] COM2 Problem with OpenBSD4.3 on NET4501

[Bill Maas]

On Wed, 2008-07-23 at 10:04 +0000, Stuart Henderson wrote:
> On 2008-07-23, Bill Maas <bill at stsx.org> wrote:
> > RTS/CTS is enabled by default, at least on a net5501 (I had trouble with
> > an oddly wired cable a while ago).
> 
> afaik, that would only affect the boot loader. for OpenBSD, use
> a boot loader dated after 2008/04/20, it was rewritten to access
> the hardware directly rather than via BIOS.

It would also affect a program that wants to talk with the comBIOS, e.g.
for selecting a boot device with no direct interaction. The issue would
still be with the cable rather than with the software.

The cable that gave me trouble with the net5501 at boot always worked
with OpenBSD from the boot loader and onwards, even with older OpenBSD
versions. The boot loader and /bsd apparently turned off RTS/CTS. So the
comBIOS ssems to provide adequate support for UART configuration, it is
just not visible to the user, except for the baud rate. In my case a
"ConHandshakeDisable" option would have been useful, it would at least
have lead me immediately to the source of the trouble. Maybe something
for b5501_134.bin?

Bill


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