I use a rev II in my A4K. Be sure to use the latest gvpscsi.device, and specify it when using the drive prep tool as the default is scsi.device (which leads back to the IDE channels).
I run mine with the boot rom disabled, since I'm booting from an IDE drive. It's not necessary for access to SCSI devices.
My jumper settings (fully populated RAM):
RAM
J5 off
J6 on
J7 off
J8 off
J9 off
J14 off
Boot
J4 off
J3 off
ID
J10 off
J11 off
J12 off
J2 2-3
DTACK
J15 off
