OSBYTE &FA

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OSBYTE &FA (250) - Read/Write RAM board status

   b0: RAM board active
   b1: Buffer active
   b2: Buffer small
   b3: Buffer large
   b4: Purging disabled
   b5: NMI in use
   b6: Workspace at fixed location
   b7: ROM claims workspace on BREAK
   (Morley RAMdisc)
   Enable/disable RAMdisc
   b0: 0=ROM enabled, 1=ROM disabled

OSBYTE &FA (250) - (Acorn MOS 3.20)

   Read/Write RAM used for VDU access
   As per OSByte &70. Do not use this for writing

See Also

http://mdfs.net/Docs/Comp/BBC/OsbyteA6

Jgharston 23:18, 26 May 2009 (UTC)

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OSBYTE