dca - HP 98644A serial communications interface
dca0 at dio? scode 9 flags 1 (on-board serial interfaces)
dca* at dio? scode ?
The 98644A is a single port EIA RS-232C (CCITT V.28) communications interface
with a single character buffer. Such an interface
is built-in to
all series 300 machines.
Input and output for each line may be set to one of the following baud
rates: 50, 75, 110, 134.5, 150, 300, 600, 1200, 1800, 2400,
An optional argument flags may be set to 1 if the line
should be treated
as hard-wired with carrier always present or 0 if modem control is desired.
dca%d: silo overflow. The single-character input ``silo''
and incoming data has been lost.
apci(4), dcm(4), dio(4), intro(4), tty(4)
Data loss is possible on busy systems with baud rates
greater than 300.
The dca has never been tested with modem control enabled or
but the built-in interface.
OpenBSD 3.6 June 9, 1993
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