Emax

Your emax has to have SCSI support chips installed. Please go to  
EmulatorArchive on the web and search in Archive there for chip details.

If you don't have correct chips, Emax does not have SCSI and you  
cannot find the chips to upgrade except by buying a broken one on ebay.

Plus rather than doing HD (which old hard drive must be small and is  
not very reliable), I recommend to put in compact flash drive.

Regards,
Ted