() — Coherent 3.1.0


com2                      Device Driver                      com2




Device driver for asynchronous serial line COM2


/dev/com2  is   the  COHERENT  system's   standard  interface  to
asynchronous serial  line COM2.  The interface  is assigned major
device 6, and is accessed as a character-special device.  The I/O
address  for the  corresponding 8250 SIO  is 0x2F8  (COM2).  com2
generates interrupt IRQ3.

Four versions of device com2 are in directory /dev, as follows:


                                                     Modem
          Device Name  Major     Minor   I/O Type  Control?
          /dev/com2l      6        128   Interrupts    No
          /dev/com2r     6         0    Interrupts    Yes
          /dev/com2pl    6        192     Polled      No
          /dev/com2pr    6        64      Polled      Yes


For details on how these differ, see the entry for com.

***** Files *****

/dev/com2l -- Interrupt-driven, non-modem (local) line
/dev/com2r -- Interrupt-driven, modem (non-local) line
/dev/P
col
m2
le
pd
l,-πon-modem (local) line
/dev/com2pr -- Polled, modem (non-local) line

***** See Also *****

com, com4, stty
























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