Rupert "naTmeg" Hausberger has published drivers for Promise SATA II 150/300-series PCI-adapters. The minimum requirements are MorphOS 1.x or higher so users running old MorphOS set ups can utilitze them as well.
Features:
Up to 2 adapters
ATA/ATAPI support
UDMA/PIO support
ATA SCSI-emulation
ATAPI disk-change handler
EXEC/TD/TD64/SCSI commands
64-bit support (drives > 2TB)
S.M.A.R.T. support
Support for query.library (HDConfig/Mounter)
You can download the drivers and sources on the following page: http://www.219.dic.at
Maybe because this is a full SATA II and maybe because G4/Pegasos models have no SATA onboard. I purchased a 500 GB SATA 300 hard disk for my G5 and I had to use the jumper settings to switch transfer speed to 1.5 gb/sec as the hard disk wasn't found at full 3gb/sec. Anyway, I guess I will buy a 4 SATA ports card for my Quicksilver G4 since I found one not so much expensive.
Not sure what's wrong at this point I have the ULsats2.device in DEVS: I have a Pegasos II system running MorphOS 3.3 Using Scout I tried to find the it in devices. It's not seeing it.. I have a Promise SATA300 TX2 plus pci controller card plugged as well.