PD uugetty for Interactives 386/ix?

[Karl Denninger]

In article <3QBJ5BI at geminix.mbx.sub.org> gemini at geminix.mbx.sub.org (Uwe Doering) writes:
>I haven't fixed the line discipline. First, the design goal for the
>dialout ports with modem control was that their behaviour is the same
>as with getty ports, with the only difference that they ignore the
>DCD line until this line goes to high. After that it will behave
>exactly like the getty ports......

Ok, I guess that's ok.  It's not quite what I had in mind, but it should
work ok for most purposes.

>I can assure you that there are only few (if any) problems with real-
>world applications and FAS. This DCD behaviour was the same with all
>previous releases of FAS, and I yet have to find a program that refuses
>to work on the dialout port. I haven't got any reports about this issue,
>either.
>
>Therefor, I still think it's much worse to let a program read/write
>from/to the port when it isn't supposed to, than to disable the port
>until the program explicitely sets it up again either by closing and
>reopening the port or by an ioctl call with the TCSETA{W|F} command.
>As I said this works with all the programs I've used so far. And
>if a program wants to ignore DCD completely it can do so by setting
>the CLOCAL termio(7) flag.

That is ok, providing that O_NDELAY toggling and control is properly
implemented.  You've said that it is; this is good.

>>>BTW, FAS 2.07 (not yet released) _will_ have VP/ix support. You won't
>>>need the X5/X6 drivers any more. :-)
>>
>>For outgoing connections AND terminal use?  Half the solution doesn't do
>>much; if I can run a mouse off it (ie: COM1MOUSE works) then you've got
>>something.
>
>Yes, COM1MOUSE works as well as COM1, and you can use COM2 at the same
>time. I've used the telecommunication program Telemate 2.10 to talk
>to a modem on COM2 while I could move the mouse cursor with a mouse
>on COM1.

That's necesasry in order to be able to say you have VP/ix support.  More
than one vendor doesn't do the second half of the job...

>And if you dial in via a modem (or have a dos mode terminal connected
>to the computer) you can start VP/ix directly on this serial line.
>I tried this with a VT100 terminal emulation and to my surprise I
>could use several fullscreen DOS applications. :-) Even if the modem
>carrier drops while you are in VP/ix the DOS emulator won't hang the
>line but instead will exit due to a SIGHUP signal.
>
>Karl, is this what you had in mind?

Yes, it is.  Unfortunately, it only handles dumb ports.  Too bad; you can't
get enough of them in with a reasonable impact on the system, even with
16550's.


--
Karl Denninger	AC Nielsen
kdenning at ksun.naitc.com
(708) 317-3285
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