DATAKIT(3) Library Functions Manual DATAKIT(3)
incon, hsvme, hs386 - Datakit interface
bind -a #i /dev
bind -a #h /dev
The Datakit interface is a stream directory containing a data and a
control file. Each write to the data file is a structured message.
The first two bytes of the message are a 9-bit virtual circuit number,
low order byte first. The third byte is a control byte. The rest are
data bytes. The data bytes are sent onto the Datakit virtual circuit,
tagged as data, followed by the control byte, tagged as control.
Messages coming from Datakit are read from the data file in the same
format. A read terminates at the end of a message. The largest possi-
ble received message is 1024 + 3 bytes.