Econet_PacketSize
Econet
» SWI Calls
» Econet_PacketSize
Econet_PacketSize
(SWI &4001B)
| Entry | |
|---|---|
| R0 | Station number |
| R1 | Net number |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Preserved |
| R2 | Maximum permitted packet size (in bytes) |
Use
The purpose of this call is to return the maximum packet size recommended on the underlying transport to a given station.
Notes
This call returns the maximum recommended packet size on the underlying transport to a given station. Larger packets will not necessarily be rejected, but their use is not recommended. The size returned is transport type dependent.
This call is intended for use by modules supplying protocols; you do not need to use it in application software. For maximum efficiency the protocol module should negotiate the packet size once. Since the recommended packet size may differ between the stations at either end of a transmission, the protocol module should interrogate both stations and take the lower value returned.
This SWI is re-entrant.
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