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OSBYTE &5A (90) - Find/set ROM status

   X=ROM id, Y=0   Enable ROM
             Y=1   Disable ROM
             Y=255 Read ROM status, b7=ROM absent, b6=ROM disabled

OSBYTE &5A (90) - (Electron PRES E00 ADFS)

   Enable/disable E00 ADFS
   X=250 - Kill ADFS 1.00, resets machine if ADFS active
   X=253 - Kill ADFS 1.2x and restart ADFS 1.xx
   X=254 - Kill current ADFS and restart ADFS 1.2x

See Also

Jgharston 21:13, 26 May 2009 (UTC)