From: news-1235297497@discworld.dascon.de   
      
   On 2009-06-25, Guillaume Tello  wrote:   
   > ROM address is at FA0000 to FBFFFF (128k)   
   >   
   > but just before: addresses from F00040 to F9FFFF are unassigned (640 KB)   
   >   
   > ANd on machines after TOS 1.06 addresses from FC0000 to FF7FFF are free   
   > (224 kB).   
   >   
   > Grouping those 3 consecutive blocks (decoding all the addresses with a   
   > bit of electronic) could lead to a 128+640+224 = 992 Kb of ROM.   
      
   Those addresses may be free, but you can't use them on the cartridge port   
   because you have neither chip select signals nor address lines available to   
   decode/use them.   
      
   cu   
   Michael   
      
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