Visit Our UNIX and Linux User Community

Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

baycom(9) [debian man page]

BAYCOM(9)						      Kernel Reference Guide							 BAYCOM(9)

NAME
baycom - amateur (AX.25) packet radio network driver for baycom modems SYNOPSIS
#include <linux/baycom.h> #include <linux/hdlcdrv.h> DESCRIPTION
The driver currently supports three different modems: ser12, par96 and par97. ser12 This is a very simple 1200 baud AFSK modem. The modem consists only of a modulator/demodulator chip, usually a TI TCM3105. The computer is responsible for regenerating the receiver bit clock. The modem connects to a serial port, hence the name. Since the serial port is not used as an async serial port, the kernel driver for serial ports cannot be used, and this driver only supports standard serial hardware (8250, 16450, 16550). par96 This is a modem for 9600 baud FSK compatible to the G3RUH standard. The modem does all the filtering and regenerates the receiver clock. Data is transferred from and to the PC via a shift register. The shift register is filled with 16 bits and an interrupt is signalled. The PC then empties the shift register in a burst. This modem connects to the parallel port, hence the name. par97 This is a redesign of the par96 modem by Henning Rech, DF9IC. The modem is protocol compatible to par96, but uses only three low power ICs and can therefore be fed from the parallel port and does not require an additional power supply. IOCTL CALLS
The ioctl calls follow the implementation in the hdlcdrv. BAYCOMCTL_GETMODEMTYPE returns the modem type (i.e. ser12 or par96) and the options in effect (currently only the source of the DCD signal) BAYCOMCTL_SETMODEMTYPE sets the modem type and the options. Only superuser can do this. BAYCOMCTL_GETDEBUG return some debugging values. Not always available. SEE ALSO
baycom (9), soundmodem (9), linux/drivers/net/hdlcdrv.c, AUTHOR
baycom was written by Thomas Sailer, HB9JNX/AE4WA, (t.sailer@alumni.ethz.ch). Linux 2.1.x 2 October 1996 BAYCOM(9)

Check Out this Related Man Page

dc(7)							 Miscellaneous Information Manual						     dc(7)

NAME
dc - serial line/mouse/keyboard SYNOPSIS
controller dc0 at ibus0 slot 0 vector dcintr DESCRIPTION
The dc serial line controller provides DECstation 2100, DECstation 3100, DECstation 5000, and DECstation 5100 computer systems with key- board, mouse, and serial communications interfaces. The serial communications interfaces on the DECstation 2100 and DECstation 3100 provide partial modem control. The serial communications interfaces on the DECstation 5000 provide full modem control. The device special file /dev/tty01 on a DECstation 5100 provides full modem control, while the remaining ports provide no modem control at all. All serial commu- nications interfaces operate at baud rates from B50 to B9600, excluding B200. The dc ports are used as follows: Usage Graphics device keyboard at 4800 BPS Mouse or tablet at 4800 BPS Communications port 1 (w/modem control)/local terminal Communications port 2 (w/modem control)/local terminal On all systems except the DECstation 5100, serial port 2 is used for the system console port in server (that is, non-graphics) configura- tions. On DECstation 5100s, the serial port labeled 3 on the back of the system is always the system console port. The serial system con- sole port always operates at 9600 BPS, 8-bits, no parity; modem control is not supported. RESTRICTIONS
Data communications equipment attached to the console serial port in server configurations must be set to 9600 BPS, 8-bits, no parity. The scc driver enforces this restriction. FILES
console terminal local terminal local terminal local terminal (DECstation 5100 only) RELATED INFORMATION
console(7), devio(7), tty(7), MAKEDEV(8) delim off dc(7)

Featured Tech Videos