Xref: utzoo comp.unix.xenix:4069 comp.unix.questions:10470 Path: utzoo!utgpu!watmath!clyde!att!rutgers!mailrus!uwmcsd1!marque!uunet!ispi!jbayer From: jbayer@ispi.UUCP (Jonathan Bayer) Newsgroups: comp.unix.xenix,comp.unix.questions Subject: Re: AST or other dumb serial card for Xenix? Summary: dumb cards ok Keywords: serial, xenix Message-ID: <300@ispi.UUCP> Date: 30 Nov 88 01:47:38 GMT References: <12693@steinmetz.ge.com> Distribution: na Organization: Intelligent Software Products, Inc. Lines: 25 In article <12693@steinmetz.ge.com>, davidsen@steinmetz.ge.com (William E. Davidsen Jr) writes: > Would someone care to comment on using a dumb serial card with > Xenix/386? I have a system which is down to 2 dumb ports because of > hardware failure. I can't afford to buy a smart card at this time, as > desirable as that might be (I just replaced the tape drive, controller, > and 1MB memory, and I have a flakey hard disk). > > Projected use would be for four modems, no faster than 2400 baud. The > other serial port would be used for a single 9600 baud connection. Has > anyone done this? Since full load is very rare (I guess four uucp or > zmodem sessions do happen, but rarely), I can accept the idea of 20-40% > of the CPU being used in interrupt service at times. It's better than no > service... That kind of use will work fine with Xenix. We have several customers who have between 8 and 12 terminals running on Xenix/386 using Digiboard 8s cards. These cards are nothing more that 8 16450s working off the same interrupt, and it is supported by SCO. You will not notice a signifigent slowdown. Jonathan Bayer Intelligent Software Products, Inc.