Re: Promise PCI Ultra66 IDE controller

Andre M. Hedrick (hedrick@Astro.Dyer.Vanderbilt.Edu)
Mon, 19 Apr 1999 16:17:48 -0500 (CDT)


On Mon, 19 Apr 1999 alex.buell@tahallah.demon.co.uk wrote:

> I am ordering two of the cards within the next few weeks. I will be glad
> to test the driver for you, but in the meantime, can older IDE drivers
> still use it in limited mode (i.e DMA33)?

I have made it work with DMA mode 2 multi-word succesfully, but that is a
low as we go. It, PDC20262, appears to be a super set of the PDC20246
with a few extra strings attached. Tests for bit 13 of id->word93
for the correct cable is a udma_66 test bit for the driver.
Since speed settings for 8 and 7 are unknown and 6->0 appear to mirror
the Ultra33, dynamic tuning for UDMA 3/4 are not performed yet.

It also appears that the set_geometry is cranky but not fatal.
This will be in "2.2.6.uniform-ide-6.19.patch.gz" to appear soon.

FYI that 80c to 40pin ribbon is a stiff witch.
The nice thing is that Promise got smart and reversed physical locations
of ide1/ide2.

front card back

ide1 Ultra33 ide2
ide2 Ultra66 ide1

Also hd. led header is at right angles and not vertical.

When you find an ATA-66 drive send me a copy of the pci-config and the
drive number.

Andre Hedrick
The Linux IDE guy
http://www.dyer.vanderbilt.edu/server/udma/2.2.5.uniform-ide-6.19.patch.gz

APC UPS Daemon Support Center.
http://www.brisse.dk/site/apcupsd/
GPLed source on April 7, 1999

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