[unix-history] / usr / man / man4 / dp.4

.TH DP 4 
.SH NAME
dp \- DP-11 201 data-phone interface
.SH DESCRIPTION
The
.I dp0
file
is a 201 data-phone interface.
.I Read
and
.I write
calls
to dp0
are limited to a maximum of 512 bytes.
Each write call is sent as a single record.
Seven bits from each byte
are written along with an eighth odd parity
bit.
The sync must be user supplied.
Each read call returns characters received from a
single record.
Seven bits are returned unaltered; the eighth bit
is set if the byte was not received in odd parity.
A 10 second time out is set and a zero-byte
record is returned if nothing is received in that time.
.SH FILES
/dev/dp0
.SH "SEE ALSO"
dn(4), gerts(3)
Commit	Line	Data
2c2d3e6c TL	1	.TH DP 4
	2	.SH NAME
	3	dp \- DP-11 201 data-phone interface
	4	.SH DESCRIPTION
	5	The
	6	.I dp0
	7	file
	8	is a 201 data-phone interface.
	9	.I Read
	10	and
	11	.I 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(4), gerts(3)