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Annotation of researchv10dc/dist/man/v4/man4/dp.4, revision 1.1.1.1

1.1       root        1: .th DP IV 8/24/73
                      2: .sh NAME
                      3: dp \*- dp11 201 data-phone interface
                      4: .sh DESCRIPTION
                      5: The
                      6: .it dp0
                      7: file
                      8: is a 201 data-phone interface.
                      9: .it Read
                     10: and
                     11: .it write
                     12: calls
                     13: to dp0
                     14: are limited to a maximum of 512 bytes.
                     15: Each write call is sent as a single record.
                     16: Seven bits from each byte
                     17: are written along with an eighth odd parity
                     18: bit.
                     19: The sync must be user supplied.
                     20: Each read call returns characters received from a
                     21: single record.
                     22: Seven bits are returned unaltered; the eighth bit
                     23: is set if the byte was not received in odd parity.
                     24: A 10 second time out is set and a zero-byte
                     25: record is returned if nothing is received in that time.
                     26: .sh FILES
                     27: /dev/dp0
                     28: .sh "SEE ALSO"
                     29: dn(IV), gerts(III)
                     30: .sh BUGS

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