From: slavotinek@gmail.com   
      
   On 28.12.2022 23:09, Louis Ohland wrote:   
   > Does the T0 do a planar ID check? If not, does that mean installing in a   
   > Model 95 is not easy?   
   >   
   > Tomas Slavotinek wrote:   
   >> If it detects the Model 90 planar, it installs the embedded ESDI BIOS   
   >> extensions and uses the Int 13h routines to check for an IML record on   
   >> the first DBA ESDI drive. [Yes, it should be possible to IML from a   
   >> DBA ESDI drive on an early Model 90 with one of the "non-enhanced" T1   
   >> BIOS ROMs. The same is true for the T0 complex, where the ESDI install   
   >> happens unconditionally - no planar ID check is needed since it was   
   >> only available with Model 90.   
      
   The T0 doesn't check the planar ID before calling the ESDI init. But   
   this shouldn't cause any trouble. It's just... unnecessary step.   
      
   There is a planar ID check in the T0 "minus" IML code, but it relates to   
   the ROM-resident Stage 2 POST that is exclusive to the 256K T0- ROM.   
   (but that code path seems to be bugged anyway...)   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)