() — Coherent 3.1.0


com1                      Device Driver                      com1




Device driver for asynchronous serial line COM1


/dev/com1  is   the  COHERENT  system's   standard  interface  to
asynchronous serial  line COM1.  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 0x3F8  (COM1).  com1
generates interrupt IRQ4.

Four versions of device com1 are in directory /dev, as follows:


                                                     Modem
          Device Name  Major     Minor   I/O Type  Control?
          /dev/com1l      5        128   Interrupts    No
          /dev/com1r     5         0    Interrupts    Yes
          /dev/com1pl    5        192     Polled      No
          /dev/com1pr    5        64      Polled      Yes


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

***** Files *****

/dev/com1l -- Interrupt-driven, non-modem (local) line
/dev/com1r -- Interrupt-driven, modem (non-local) line
/dev/P
col
m1
le
pd
l,-πon-modem (local) line
/dev/com1pr -- Polled, modem (non-local) line

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

com, com3, stty
























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