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From: markw@airgun.wg.waii.com (Mark Whetzel)
Newsgroups: comp.sys.ibm.pc.rt
Subject: Re: Portable Disk and lp0 (In English)
Summary: RT and portable controller
Keywords: Portable Disk 6156, serial printer
Message-ID: <43@airgun.wg.waii.com>
Date: 13 Oct 89 15:17:22 GMT
References: <1861@wucc.waseda.ac.jp>
Organization: Western Geophysical, Houston
Lines: 21

In article <1861@wucc.waseda.ac.jp>, cnt022@wucc.waseda.ac.jp (Muraoka Labo. center) writes:
> We have external hard disk drive(6156-001, 310MB portable disk).
> I have done the installation of this under AIX 2.2.0.
> But after installation, it is happened that I can't use a
> printer which is connected serial port 1.  (Before installation
> I had been able to use lp0.)
[ status description deleted ]
> 
> The system is 6150 with APC, AFPA with DMA support and Extended 
> ESDI ver1.00.  The printer type is osp1(other serial printer 1).
Check for interrupt level conflicts. serial port #1 uses dma channel 3 and
no interrupt levels.  The portable disk controller card by default also
uses by design dma channel #3.  (it is considered the secondary controller and
the original EESDI or ESDI controller card id the primary)
For serial port #1 to operate, set it to use DMA channel 1.  No other cards
or adapters use this channel.
-- 
Mark Whetzel     My comments are my own, not my company's.
Western Geophysical - A division of Western Atlas International,
A Litton/Dresser Company           DOMAIN addr: markw@airgun.wg.waii.com
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