🚀 go-pugleaf

In article <HeUz1CAvwWmyEwhl@sjbcomps.demon.co.uk>, Steve Barnes
<steveb@sjbcomps.demon.co.uk> writes
>In article <CiY4pCADyCmyEwid@chookang.demon.co.uk>, Alan Choo-Kang
><alan@chookang.demon.co.uk> writes
>>
>>Also, if I set the connect speed to be 115 200, I get loads of overruns.
>>This shouldn't be the case using a 16550 UART should it?
>>
>>Any help would be appreciated,
>>
>Yep, I a am afraid so!  Without a Fast UART you have no hope of
>successfully using the higher speeds, even if you get a connection at
>the high speeds the resulting overruns will result in a 'net' overall
>speed that is slower than a lower speed connection!  This is because
>each overrun will result in one or more retransmitted packets, which
>might themselves overrun.  Thus you may well get connected at 28.8 but
>have to get the data sent 3 or 4 times rather than connnecting at 14.4
>but only having it transmitted once.
>
>In general if you do not have a Fast UART between your computer and your
>modem it is advisable not to try to connect above 14.4k and on some
>older, slower computers, with limited memory and slow hard drives you
>may find that 9600 works better than 14.4k.

Ah but a 16550 _is_ a 'fast' UART isnt it. That's what I'm using and so
I should be able to connect at the higher speeds without overruns,
shouldn't I?

I used to connect at 38400 or 57600 with my old 14.4 using the same
interface (I bought a new serial card), but now that I have bought a
33.6k modem I thought that I would be able to go right up to 115200. I
can use 57600 ok with the 33.6 modem - no overruns.


However not ever being able to connect at 33600 or even 28800 is really
annoying. Why is this?

-- 
Alan Choo-Kang                           __/^^^\__
Chester, UK                             /         \  I'm only
E-Mail:  alan@chookang.demon.co.uk      \_________/  happy when
                                         ,   ,  ,    it rains..
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