Int 4B  - Acorn Bbc Master 512 - "osbyte" - Misc Functions Using Register  [O]

   AL = function code
   BL = first parameter
   BH = second parameter (if needed)

Return: BL = first return parameter
   BH = second return parameter
   CF depends on function

See Also: INT 40"Acorn",INT 4A"Acorn",INT 4C"Acorn"