From: google@holzapfel.biz   
      
   Thank you Sandy for looking that up!   
      
   According to that article, it should be as simple as flashing it over.   
   Involved BIOS versions back then are the same: n1jt89a for PCI/ISA and n2jt50a   
   for PCI/MCA.    
   Looking at the disks, the include differently named files, and seem to   
   validate for a system of their specific type.   
   So I really wonder how a conversion was ever possible to that fellow...   
      
   It does not seem to matter whether the PCI/MCA riser is 3 or 5 slot. I have   
   both here, and they are interchangeable on a configured PCI/MCA system   
   (another 6886). Comparing them visually, it seems they have the same ICs   
   onboard, the same count of PCI    
   slots (2 slots + bridge chip as an additional device), and only differ in the   
   number of MCA slots they offer.   
      
   I did an upgrade of the existing PCI/ISA BIOS to the latest version, but   
   migrating from that to MCA is still prohibited. Maybe I need an older version   
   of the flash utility... will try.   
      
   Flash chip on the 6885/6876/6886 boards is U13, which is an ST M28F101-150K,   
   pretty standard 1 MBit flash memory.   
   If I dare to rename the flash image and trick FLSHUPDT.EXE, I may recover the   
   chip with my programmer. Maybe should place a socket first...   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)