1BAYCOM(9)                   Kernel Reference Guide                   BAYCOM(9)
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NAME

6       baycom - amateur (AX.25) packet radio network driver for baycom modems
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SYNOPSIS

9       #include <linux/baycom.h>
10       #include <linux/hdlcdrv.h>
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DESCRIPTION

14       The  driver currently supports three different modems: ser12, par96 and
15       par97.
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17   ser12
18       This is a very simple 1200 baud AFSK modem. The modem consists only  of
19       a  modulator/demodulator  chip,  usually  a TI TCM3105. The computer is
20       responsible for regenerating the receiver bit clock. The modem connects
21       to  a serial port, hence the name. Since the serial port is not used as
22       an async serial port, the kernel driver  for  serial  ports  cannot  be
23       used,  and  this  driver  only supports standard serial hardware (8250,
24       16450, 16550).
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26   par96
27       This is a modem for 9600 baud FSK compatible  to  the  G3RUH  standard.
28       The  modem  does  all the filtering and regenerates the receiver clock.
29       Data is transferred from and to the PC via a shift register.  The shift
30       register  is  filled with 16 bits and an interrupt is signalled. The PC
31       then empties the shift register in a burst. This modem connects to  the
32       parallel port, hence the name.
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34   par97
35       This is a redesign of the par96 modem by Henning Rech, DF9IC. The modem
36       is protocol compatible to par96, but uses only three low power ICs  and
37       can  therefore  be  fed  from the parallel port and does not require an
38       additional power supply.
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IOCTL CALLS

42       The ioctl calls follow the implementation in the hdlcdrv.
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45       BAYCOMCTL_GETMODEMTYPE
46              returns the modem type (i.e. ser12 or par96) and the options  in
47              effect (currently only the source of the DCD signal)
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49       BAYCOMCTL_SETMODEMTYPE
50              sets the modem type and the options. Only superuser can do this.
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52       BAYCOMCTL_GETDEBUG
53              return some debugging values. Not always available.
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SEE ALSO

58       baycom (9), soundmodem (9), linux/drivers/net/hdlcdrv.c,
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AUTHOR

62       baycom     was     written     by    Thomas    Sailer,    HB9JNX/AE4WA,
63       (t.sailer@alumni.ethz.ch).
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67Linux 2.1.x                     2 October 1996                       BAYCOM(9)
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