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1.1 root 1: .TH DATAKIT 3
2: .SH NAME
3: incon, hsvme, hs386 \- Datakit interface
4: .SH SYNOPSIS
5: .nf
6: .B bind -a #i /dev
7: .B bind -a #h /dev
8:
9: .B #i/data
10: .B #i/ctl
11: .B #h/data
12: .B #h/ctl
13: .fi
14: .SH DESCRIPTION
15: The Datakit interface is a stream directory
16: containing a data and a control file.
17: Each write to the data file is a structured message.
18: The first two bytes of the message are a 9-bit virtual circuit number,
19: low order byte first.
20: The third byte is a control byte.
21: The rest are data bytes.
22: The data bytes are sent onto the Datakit virtual circuit, tagged as data, followed
23: by the control byte, tagged as control.
24: .PP
25: Messages coming from Datakit are read from the data file in the same
26: format.
27: A read terminates at the end of a message.
28: The largest possible received message is 1024 + 3 bytes.
29: .SH "SEE ALSO
30: .IR dk (3)
31: .SH SOURCE
32: .B /sys/src/9/*/devhs.c
33: .br
34: .B /sys/src/9/*/devincon.c
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