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Date:      Mon, 25 Jan 1999 17:08:19 +1100
From:      Bruce Evans <bde@zeta.org.au>
To:        grog@lemis.com, lcremean@tidalwave.net
Cc:        current@FreeBSD.ORG, dillon@apollo.backplane.com
Subject:   Re: IDE DMA works, I'll be a...
Message-ID:  <199901250608.RAA24912@godzilla.zeta.org.au>

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>> Can you find out what chipset is in this guy? There's support for anything
>> Intel or VIA, Promise UDMA cards, Cyrix MediaGX, and Acer Aladdin IV/V right
>> now.
>
>See kern/9550.  The driver *used* to support my SiS chipset, but it no
>longer does when both master and slave drive are present since I
>updated about a week ago.  Possibly the same bug is biting Matt.

The driver doesn't have any special support for SiS.  It uses generic
support in some cases, apparently including your case.  Recent fixes
made it actually initialize DMA on the correct drive, but the
initialization in generic_dmainit() is buggy (it assumes multi-word
DMA mode 2 but your IDE timing is apparently incompatible with this).

Bruce

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