Yup :(
> The good news is that ISA DMA is broken anyway, and it might just be an
> acceptable option to not even have a "BROKEN_DMA" config option, but
> just unconditionally refusing to allow two concurrent ISA DMA streams.
> The only things I know of that do ISA DMA is the floppy and old sound
There are also folks with good mainboards and Adaptec 1542
controllers. Having sound skip on HD access is unacceptable
if things worked great before the 'fix'...
> cards, and if that means that the sound skips while accessing the floppy
> I don't know if we really need to worry too much..
Just making it a CONFIG option, or even a sysctl tunable
option would make a good enough fix. On most systems it's
not something to worry about anyway, since both floppy
and sound are very much non-critical.
Besides, we only need DMA to do floppy _writes_, reads can
be done reliably without DMA (on a non-fifo fdc). That only
results in some 32k+ interrupts/second from the fdc :)
Rik.
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