On Wed, Nov 29, 2000 at 07:07:10PM -0500, Matt Herzog wrote:
> Hi. Guess what? The Promise ATA 100 i/o card works nicely
> on my i386 NetBSD 1.4.3 machine. You might want to update 
> the Supported Hardware page. Yah!
> 
> pciide1 at pci0 dev 17 function 0: Promise Ultra100/ATA Bus Master IDE Accelerat
> or (rev. 0x02)
> pciide1: bus-master DMA support present
> pciide1: primary channel configured to native-PCI mode
> pciide1: using irq 10 for native-PCI interrupt
> wd0 at pciide1 channel 0 drive 0: <Maxtor 51024U2>
> wd0: drive supports 16-sector pio transfers, lba addressing
> wd0: 9770MB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 20010816 sectors
> wd0: 32-bit data port
> wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 4
> wd0(pciide1:0:0): using PIO mode 4, Ultra-DMA mode 2 (using DMA data transfers)
> pciide1: secondary channel configured to native-PCI mode
> pciide1: disabling secondary channel (no drives)
> 
> Any idea what I can use in the kernel config for this part?
> 
> # IDE drives
> # Flags are used only with controllers that support DMA operations
> # and mode settings (e.g. some pciide controllers)
> # The lowest order four bits (rightmost digit) of the flags define the PIO
> # mode to use, the next set of four bits the DMA mode and the third set the
> # UltraDMA mode. For each set of four bits, the 3 lower bits define the mode
> # to use, and the last bit must be 1 for this setting to be used.
> # For DMA and UDMA, 0xf (1111) means 'disable'.
> # 0x0fac means 'use PIO mode 4, DMA mode 2, disable UltraDMA'.
> # (0xc=1100, 0xa=1010, 0xf=1111)
> # 0x0000 means "use whatever the drive claims to support".
> wd*     at wdc? channel ? drive ? flags 0x0000 
> wd*     at pciide? channel ? drive ? flags 0x0000
> 
> I don't understand the hex part.

If your hardware work fine this way, don't bother. This is only used to
force the operating mode on some (broken) hardware that needs it.

--
Manuel Bouyer <bouyer@antioche.eu.org>
--