Re: LZ: Teleconferece: accel

Subject: Re: LZ: Teleconferece: accel
From: Andy Selle <aselle@earth.mat.net>
Date: Wed, 17 Jul 1996 09:12:42 -0400 (EDT)
In-Reply-To: <Pine.3.07.9607162214.A12401-9100000@login>

The speed slows down when a non turboed calc connects to a turboed calc 
not because it works at a certain speed.   It is because after each bit 
is sent the sending calc waits for confirmation.  If it is a turbowed 
calc the receiving calculator can poll the link port cfaster so that the 
link goes faster.  But it doesn't maintain a fixed speed like modems do.  
THe speed of the processor is the speed of the link.  Unlike on the PC 
where the speed of the modem is the speed of the transmission.  That's 
why on the pc to maintain reliable data transmission at high speeds an 
interrupt serial routine is used instead of a polling routine.  Modems 
don't wait for processed confirmation they just store the bit in a buffer 
and go on..

-Andy

On Tue, 16 Jul 1996, Andrew Haninger wrote:

> that's nothing special, that's just like a computer modem, the slowest
> determines the speed of the connection. you can't connect a 9600bps compo
> to a 28.8bps at 28.8, the fastest you can connect at is 9600. 
> Andy haninger
> ahaning@freenet.columbus.oh.us
> 
> 
>

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