Date: Tue, 10 Oct 1995 02:13:15 -0400 From: itsymbal@husc.harvard.edu (Sir Ilya Tsymbal) To: questions@freebsd.org, hardware@freebsd.org Subject: FreeBSD & ATI Mach64 install problem (follow-up) Message-ID: <199510100613.CAA00580@husc.harvard.edu>
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I have been having a problem installing FreeBSD with Mach64 card. During the start-up phase when hardware is probed, the screen either goes blank or (depending on the monitor) shows lines. A different cideo card (Diamond SpeedStar) works fine. I have found that if I start with -c flag during boot and disable ALL com ports - sio0-3 then the card behaves appropriately. I do need to use a mouse ( at least) and preferably a modem. The ATI install disk claims the card is using Base I/O address 0x2ECh; however, with all com ports disabled it works fine if sc0 is set to either 0x2ec (card's setting) or 0x60. I have found no sure way to tell which IRQ the card is using; it seems to work fine with sc0's irq set to 1. If I leave any one com port enabled, the card will mess up. Wether or not the particular com port is actually present does not seem to make a difference. That's all the information I have; I would appreciate any input. Thank you, Ilya Tsymbal
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