() — Coherent 3.1.0


com3                      Device Driver                      com3




Device driver for asynchronous serial line COM3


/dev/com3  is   the  COHERENT  system's   standard  interface  to
asynchronous serial  line COM3.  The interface  is assigned major
device 5, and is accessed as a character-special device.  The I/O
address  for the  corresponding 8250 SIO  is 0x3E8  (COM3).  com3
generates interrupt IRQ4.

Four versions of device com3 are in directory /dev, as follows:


                                                     Modem
          Device Name  Major     Minor   I/O Type  Control?
          /dev/com3l      5        129   Interrupts    No
          /dev/com3r     5         1    Interrupts    Yes
          /dev/com3pl    5        193     Polled      No
          /dev/com3pr    5        65      Polled      Yes


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

***** Files *****

/dev/com3l -- Interrupt-driven, non-modem (local) line
/dev/com3r -- Interrupt-driven, modem (non-local) line
/dev/P
col
m3
le
pd
l,-πon-modem (local) line
/dev/com3pr -- Polled, modem (non-local) line

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

com, com1, stty
























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