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Article #8Re: More than 4 com-ports and Ms-dos 5.0 ???
From: fred j mccall 575-3539
Date: Sat, 31 Oct 1992 01:45
Date: Sat, 31 Oct 1992 01:45
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In <1992Oct27.161147.2784@abo.fi> MSUORANTA@finabo.abo.fi (Mika Suoranta Tkkk) writes: > > MORE COM-PORTS?? > > Does anyone know how one could possibly have > more than 4 Com-ports in one computer? I've an 286 > machine running under Ms-dos 5.0 and as far as I > understand the operating system sets the limit. The limit is primarily hardware set. However, there are special multi-port boards (with their own drivers) that will allow more than 4 COM ports by using the same IRQ for the entire card and then letting the card arbitrate the ports (for example). I've seen both 4 and 8 port cards. These are generally used by folks running large multi-line BBS systems (for example). Some of the makers of these boards are folks like Digiboard and Stallion (two names that occur -- there are a lot of others). -- "Insisting on perfect safety is for people who don't have the balls to live in the real world." -- Mary Shafer, NASA Ames Dryden ------------------------------------------------------------------------------ Fred.McCall@dseg.ti.com - I don't speak for others and they don't speak for me.
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Path: arc1-ca.pugleaf.net!sparky!uunet!ogicse!uwm.edu!cs.utexas.edu!csc.ti.com!tilde.csc.ti.com!mksol!mccall From: mccall@mksol.dseg.ti.com (fred j mccall 575-3539) Newsgroups: comp.periphs Subject: Re: More than 4 com-ports and Ms-dos 5.0 ??? Message-ID: <1992Oct31.014537.9920@mksol.dseg.ti.com> Date: 31 Oct 92 01:45:37 GMT Article-I.D.: mksol.1992Oct31.014537.9920 References: <1992Oct27.161147.2784@abo.fi> Organization: Texas Instruments Inc Lines: 25