From: ibmmuseum@gmail.com   
      
   >> I have had Future domain cards fail in a similar fashion...... I    
   >> inserted reprogrammed e-proms in and every thing played fine...    
      
   The Future Domain SCSI adapters don't use the 82C611/82C612 chipset, which has   
   an external mechanism for passing the POD ID of the adapter (several adapters   
   use these microchannel interface chips) and have a "Device not ready" ('0000')   
   mechanism for the    
   system if the adapter fails. The error is repeatable with the Adaptec AHA-1640   
   implementation; Lionel and I each have one adapter affected this way.   
      
   The ROM of the Future Domain SCSI adapters is to boot from an attached hard   
   drive; They can be used ROM-less with a SCSI CD-ROM, for instance. The   
   AHA-1640, on the other hand, has a ROM BIOS extension ('U6'), microcode ROM   
   ('U5'), and three socketed PALs.   
    It i unknown right now where the POS ID logic is on the AHA-1640 adapter, or   
   how it is implemented. All socketed chips (ROMs and PALs) on the AHA-1640 are   
   required.   
      
   Once I have an opportunity, I'm going to start switching PALs from a   
   known-good AHA-1640, and also might try the microcode ROM (POS ID logic likely   
   won't be in the ROM BIOS extension chip)...   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)