Subject: Re: com driver troubles on NetBSD/i386
To: David Gilbert <dgilbert@jaywon.pci.on.ca>
From: Jukka Marin <jmarin@pyy.jmp.fi>
List: current-users
Date: 05/27/1996 08:06:56
> 	To add a little more heat to this frey, it seem to me that the
> most interesting new function in this driver is that it's able to set
> the hardware flow control.  As I understand it, the 'stop' signal on
> the 16550 must be set by software (unless you have a slightly better
> 16550).

Yep.  I was surprised to find that the 16550's can't control the RTS
signal automatically.  Even the Motorola 68681 can do that if told so.

> 	Even if this were fixed properly, it would be desireable that
> the serial drivers had provision for high-priority setting of the flow
> off bit on stupid serial chips (which seems to be about 99% of serial
> chips out there).

Yes.. but if you're looking at the UART already, you could get some
bytes off the FIFO as well :)

  -jm