Hi I hate to disappoint you, but I have two of those cards, one is a HC (No Ram) and the other a HC2 (2meg). Using the 1.0 version of scsidev.device you will not be able to query the scsibus at all. Scsidev.device will allow you a single HDD on SCSI ID 0 (I think?). You cannot put a CDROM drive on the system either, not even if you get the addresses and termination perfect. Whenever you query the scsibus, it'll hang.
I got around this problem by disabling the on board ROMS and booting with a floppy disk that mounted the HDD using the binddrivers gvpscsi.device v3.15 from Ralph Babels site. I then used a command called defdisk and swapped to booting from the HDD. If you do this you can have a CDROM as well.
Ralph Babels site has what are supposed to be ROM updates for those cards. I tried my heart out to get them to work, but alas twas not to be!!
The ROM updates do not look like they are compatible at all.
If you find anybody that has an updated scsidev.device, please share the goodies :-))
I tried for quite a bit here, but it eventually disappeared and was forgotten :-(
I then brought replacement cards off ebay, coz I didn't like booting from floppy :lol: