[comp.sys.ibm.pc.misc] Servicing 8

irani@tera.cs.umn.edu (Erach Irani) (01/19/91)

A friend of mine wants to have a program that allows 8 or so people 
(over modems) to communicate with each other in a game.

Any programs to do so?  Can an IBM-PC compatible (XT/AT/386) do this
considering that there are only 4 serial ports?  Any manufacture
information on multiplexors appreciated although I've heard they use
their own (expensive) modems?  Is it absolutely impossible to use an
IBM-PC?
Does Coherent UNIX (the $99 UNIX) and other UNIX's allow more than 4
serial ports ?

	Thanks,
	erach (irani@cs.umn.edu)
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ong@d.cs.okstate.edu (ONG ENG TENG) (01/19/91)

From article <1991Jan18.183933.3695@cs.umn.edu>, by irani@tera.cs.umn.edu (Erach Irani):
> A friend of mine wants to have a program that allows 8 or so people 
> (over modems) to communicate with each other in a game.
> 
> Any programs to do so?  Can an IBM-PC compatible (XT/AT/386) do this
> considering that there are only 4 serial ports?  Any manufacture
> information on multiplexors appreciated although I've heard they use
> their own (expensive) modems?  Is it absolutely impossible to use an
> IBM-PC?
> Does Coherent UNIX (the $99 UNIX) and other UNIX's allow more than 4
> serial ports ?

Currently, there is a game called TRACON2, traffic controller game that
allows up to 16 Microsoft Flight Simulator 4.0-loaded PC's to hooked on.
It uses a Digi-board ($1800 for the buffered version, $1200 for non-buffered,
price approx. got direct from Digi-board maker).  

I just bought a multi-serial board that allows used as COM1 to COM8, 
but only 4 IRQ lines (2 to 5).  Actually, IRQ2 becomes IRQ9 in AT machine
(so I was told, by many).  I assumed we can make 4 lines worked 
together, since I have programs that use 2 lines effectively (anyone has 
any idea, please explain if 4 simultanous line is possible).

If you get any workable/cheaper multi-serial devices, please post or
let me know.

Thanks in advance.

E. Teng Ong (ong@d.cs.okstate.edu) 

alberti@cs.umn.edu (Albatross) (01/19/91)

In <1991Jan18.183933.3695@cs.umn.edu> irani@tera.cs.umn.edu (Erach Irani) writes:
>A friend of mine wants to have a program that allows 8 or so people 
>(over modems) to communicate with each other in a game.

>Any programs to do so?  Can an IBM-PC compatible (XT/AT/386) do this
>considering that there are only 4 serial ports?  Any manufacture
>information on multiplexors appreciated although I've heard they use
>their own (expensive) modems?  Is it absolutely impossible to use an
>IBM-PC?

In 1984 I ran a business which handled 16 modems at 300 baud using an
IBM PC XT.  It ran the QNX operating system and employed a Control Systems,
Inc., Hostess Board to handle the modems.  I suspect that modern machines
moving at five to ten times rate of the old PCXT could do much better quite
easily.
-- 
Bob Alberti  Micro and Wkstn Networks Ctr, U of MN   // aka: Albatross| Unitar-
Internet:    alberti@boombox.micro.UMN.EDU        \\//  The Mars Hotel| ian/
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