dz man page on Ultrix

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dz(4)									 dz(4)

Name
       dz - DZ11/DZ32 communications interface

Syntax
       device dz0 at uba0 csr 0160100 flags 0x????
	    vector dzrint dzxint

Description
       A  DZ11/DZ32  interface provides eight communication lines with partial
       modem control, adequate for dialup use.	 Each  line  attached  to  the
       DZ11/DZ32  communications  interface behaves as described in and can be
       set to run at any of 16 speeds.	See for the encoding.

       Bit i of cwcanmay be specified for a to say that a line is not properly
       connected,  and that the line should be treated as hardwired, with car‐
       rier always present.  Thus, specifying ``flags 0x04'' in the specifica‐
       tion of would cause line 2 to be treated in this way.

       The  driver  normally  uses its input silos and polls for input at each
       clock tick (10 milliseconds), rather than taking an interrupt  on  each
       input character.

Diagnostics
       dz%d: silo overflow
       The  64-character  input	 silo  overflowed before it could be serviced.
       This can happen if a hard error occurs when the	CPU  is	 running  with
       elevated	 priority, as the system then prints a message on the console,
       with interrupts disabled.

Files
       (modem lines only)

See Also
       tty(4), MAKEDEV(8)

				      VAX				 dz(4)
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