Re: tlug: Re: ISDN problems

[Scott Stone <sstone@example.com>]

On Mon, 9 Nov 1998, Chris Sekiya wrote:

> On Mon, 9 Nov 1998, Howard Abbey wrote:
> 
> > It's desired, and also an explanation of why cua* was used in the first
> > place, if you know.
> 
> Okay.
> 
> UNIX didn't used to have bidirectional serial lines.  One device was used
> for inbound connections (ttyS*, in Linux ... I misremember the SunOS
> device), one was used for outbound connections (cua*, in Linux).  For the
> TLUG folks out there who remember getty_ps: this was the reason that the
> altline/altlock directives existed -- both lines needed to be watched,
> because all hell would break loose if two processes tried to talk to the
> same physical device via two different logical devices.
> 
> The linux kernel received bidirectional serial lines over a year ago
> (IIRC).  Now ttyS* and cua* devices are treated identically.  cua* support
> is still there for compatibility reasons, but it'll eventually go away.

I was using /dev/ttySxx for outgoing dialups in late 1995, IIRC.  I could
be wrong, though.  But I think it's older than a year, at least.

--------------------------------------------------
Scott M. Stone <sstone@example.com, sstone@example.com>
Head of TurboLinux Development/Systems Administrator
Pacific HiTech, Inc (USA) / Pacific HiTech, KK (Japan)


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