Amiga 2000 with SCSI and IDE

[danbeaver]

What is the boot priority of the CF drive?  When you say "unplugged" the SCSI drive did you mean it is no longer connected to the SCSI cable or no longer powered?   When you right click to get to the startup menu on booting, can you select the CF card?  If so, I would leave the autoboot on and work on the boot priority.

[danbeaver]

Yes, try a boot priority that is higher to force the OS to bypass the CD; I'm not used to the setup with two controllers, but if it boots without the A2091 to the CF card, then you should bypass the SCSI CDROM at a priority of 11 ( OS4.1 has the CD set at 10 I believe).

[danbeaver]

I believe the Soft ROM is just a software extension the speed up the card especially when the card is modified  with the 14 MHz jumper.  Card position won't change anything but automatic memory config order.  Did you think of just using an IDE CDROM?  They are considerably less expensive than the SCSI ones

[danbeaver]

The SYS:Expansion drivers were for KS 1.3 systems.  

I had an A2000 with V7.0 ROMs in an A2091 and a CDROM plus SCSI CF card reader and 1 GB  HDD all working fine.

My guess is that the SCSI CDROM is telling the A2091 controller that it is a bootable device because it was designed for a system where it was one.

ROMs contain Firmware not Software. :-)