Article View: comp.sys.ibm.pc
Article #26486Re: multiple RS232 ports
From: Bill Mayhew
Date: Sun, 17 Apr 1988 02:42
Date: Sun, 17 Apr 1988 02:42
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<<what to do about multiple RS232 ports on an XT?>> AT least two aftermarket products come to mind: Arnet and Digiboard. I think that Digiboard has the edge on quality, while it may easer to get Arnet products, since Radio Shark is one of their distributors. The boards use a slave 80188 CPU tightly coupled to 16450 ACIA chips. The 80188 then blops the stuff to the PC via a DMA channel. The board can emulate a COM: port without special driver software. To get the most out of it, you need to run a device driver to support the DMA under DOS. Both of the above boards are supplied with Xenix drivers. There are a lot of other comapnies that make similar products, these are just two that I have happened to use (with an older Compaq 386 and Xenix, that is). --Bill
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arc1-ca.pugleaf.net!utzoo!utgpu!water!watmath!clyde!att-cb!att-ih!pacbell!ames!umd5!uvaarpa!mcnc!decvax!mandrill!neoucom!wtmReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!water!watmath!clyde!att-cb!att-ih!pacbell!ames!umd5!uvaarpa!mcnc!decvax!mandrill!neoucom!wtm From: wtm@neoucom.UUCP (Bill Mayhew) Newsgroups: comp.sys.ibm.pc Subject: Re: multiple RS232 ports Summary: Check out Arnet multiport board Message-ID: <1111@neoucom.UUCP> Date: 17 Apr 88 02:42:31 GMT References: <3850@medusa.cs.purdue.edu> Organization: Northeastern Ohio Universities College of Medicine Lines: 20