baud modifier

David Griffith dgriffi at
Sun Mar 11 16:29:51 CDT 2007

On Sun, 11 Mar 2007, Tony Duell wrote:

> > > Are there many computers (apart from the BBC Micro!) that can do 9600
> > > baud but not 110 baud? I ask merely for information.
> >
> > The Spare Time Gizmos SBC6120 (single board pdp8e clone) allows 38,400,
> > 9600, 1200, and 300.  There's a permanent mod that adds 110, but I'm put
> > off by the permanent part.  You also lose the 38,400 setting.
> Does it support hardware flow control on the console port? If not, then
> you're going to have a problem if the machine is seding characters at,
> say, 1200 (about 120 cps) baud and your tty is only taking them at 110
> baud (about 10 cps, since 110 baud often implies 2 stop bits). You've
> got to have a way to tell the faster side to stop sending for a bit.

I'm not sure.  I just want to drop 300 down to 110.

> What does the mod consist of? I can't believe it's really permanent
> (although it might well involve soldering to undo it). Losing 38400 buad
> is surely not a problem, since few, if any, classic terminals ran at that
> speed, and you don't _need_ that sort of data rate for a tectual terminal
> anyway.

The mod is discussed in this post:

David Griffith
dgriffi at

A: Because it fouls the order in which people normally read text.
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