OSWORD &11 (17 ) - Open or read network receive block NFS
XY?0=0 - Open receive block On entry: XY?0 =0 XY?1 must contain &7F XY?2 =port to receive on XY+3..4=station to receive from XY!5 =reception buffer start address XY!9 =reception buffer end address On exit: XY?0=0 if no more space to open blocks, or number of opened reception block. Receive blocks can be 'wild', ie will receive from anyone if the port or station values are set to &00.
XY?0<>0 - Read and delete receive block On entry: XY?0=receive block number to read XY!5=receive buffer start address XY!9=receive buffer end address On exit: XY?1 =flag from transmission block XY?2 =port received on XY+3..4=station received from XY!9 =updated to new address of buffer end
Unread receive blocks must be deleted with OSBYTE &34 (52).
Jgharston 13:24, 26 May 2009 (UTC)