OSBYTE &BF

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OSBYTE &BF (191) - Read/Write RS423 busy flag 

   Contains 0 for RS423 busy (ie.cassette filing system should not use it)     
            128 for RS423 free
   (RISC OS 1.00)
   Contains no useful information

See Also

Jgharston 22:37, 26 May 2009 (UTC)

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