OSBYTE &72

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OSBYTE &72 (114) - Specify video memory to use on next MODE change

       X=0 force use of shadow memory on future MODE changes
       X=1 only use shadow memory if MODE number is > 127
   (Solidisk ROM/RAM Extension)
       X=255 never use shadow memory

This OSBYTE is called by the *SHADOW command on the BBC B+ and Master.

See Also

WikiSysop (talk) 13:34, 8 March 2015 (UTC)