*BSD News Article 26262


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From: mills@engin.swarthmore.edu (Patrick Mills)
Newsgroups: comp.os.386bsd.questions
Subject: DOS disk + SIO lines
Date: 20 Jan 1994 03:55:12 GMT
Organization: Swarthmore College, Swarthmore, PA, USA
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I have two questions.  I have poured over the FAQ and similar articles,
but haven't found any satisfactory answers yet.  I you can answer either
question, please mail me:  mills@engin.swarthmore.edu.  I will summarize
and repost.  Thanks.

1.)  Will running disklabel on a disk containing only MS-DOS fry the DOS
	partition?  If so, how can I use PCFS to mount my DOS disk.
	Here's my set:
		wd0 is the MS-DOS disk, wd1 is FreeBSD 1.0, I am using
	BootEasy on wd0 to allow me to boot from either drive.

	wd0 -- Offset 36, size 411660

	b/sec 512, sec/trk 36, trk/cyl 12, sec/cyl 432, cyl 954

2.)  How can I access COM 3 and COM 4.  I'd like to be able to access my
	internal modem.  I currenly have COM 1 and COM 2 setup as SIO lines
	and they work fine.  I have tried masses of different configurations
	but nothing seems to work.

			IRQ	PORT
	COM 1		4	03F8
	COM 2		3	02F8
	COM 3		4	03E8
	COM 4		3	02E8

	The main problem occurs since COM 3 has the same IRQ as COM 1, and
	COM 4 as COM 2...when the system boots, it gets confused.

	Thanks for any help.

						-Pat
						mills@engin.swarthmore.edu