sh.4

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· 4 代码 · 共 38 行

.TH sh 4 VAX
.SH Name
sh \- Small VAX DHT32 serial line interface
.SH Syntax
.B "device sh0 at uba0 csr 0x38000000 flags 0xff vector shrint shxint"
.SH Description
.NXS "sh interface" "DHT32 serial line interface"
.NXR "DHT32 serial line interface"
A DHT32 provides eight asynchronous communication lines with no modem control.
.PP
Each line attached to the DHT32 communications multiplexer
behaves as described in
.MS tty 4 .
Input and output for each line can be set independently
to run at any of 16 speeds.
See
.MS tty 4
for the coding.
.PP
Because no modem control is provided, a flags field of 0xff
must be specified to ensure that all lines will be handled as data leads
only.
.SH Diagnostics
.B "sh%d: DIAG. FAILURE"
.br
A failure has been detected by internal module diagnostics.
.PP
.B "sh%d: recv. fifo overflow"
.br
The character input fifo overflowed
before it could be serviced.  This can happen if a hard error occurs
when the CPU is running with elevated priority.  Interrupts are
disabled, and the system then prints a message on the console.
.SH Files
.PN /dev/tty??
.SH See Also
tty(4), MAKEDEV(8)