OSWORD &18

OSWORD &18 (24): IP Network transmit

This call is made by a modifed NFS to pass networking calls on to an IP networking handler. It should not be called directly by the user, programs should call OSWORD &10 and allow the networking system to forward the call to the appropriate handler.

Specification

On entry:
  XY?0   = control byte with b7 set
  XY?1   = destination port
  XY+2..3= destination station
  XY!4   = buffer start address
  XY!8   = buffer end address
  XY!12  = remote address for immediate operations
On exit
  XY?0   = zero if transmission failed to start

Transmission must be polled with OSBYTE &32 (50). If the destination station is &FFFF, a broadcast will be sent, the eight bytes of data are in the control block at XY+4 to XY+11. If the port number is zero, an immediate operation is transmitted.

See Also

• OSWORD &10 NetTx
• http://mdfs.net/Docs/Comp/BBC/Oswords

Networking calls
OSWORD &10 : Network transmit OSWORD &11 : Network receive OSWORD &12 : Read remote argument block OSWORD &13 : Read and Write local station information OSWORD &14 : Communicate with fileserver, etc.	OSBYTE &32 : Poll network transmit OSBYTE &33 : Poll network receive OSBYTE &34 : Delete receive control block OSBYTE &35 : Terminate remote connection

Jgharston 01:31, 19 December 2010 (UTC)