Quatech DSP-100 - Manual (Page 50)

9. Unix Support
The DSP-100 and other Quatech asynchronous serial communications interface
products are supported in the UNIX operating system by Quatech’s UNIX Enhanced
Serial Device Driver. This driver is not included with the DSP-100, but may be
purchased separately.
9.1 UNIX Enhanced Serial Device Driver
The Enhanced Serial Device Driver provides a fully interrupt driven, buffered
input/output system for multiple RS-232 serial ports in an IBM or compatible
microcomputer using the SCO UNIX System V Operating System. The Enhanced
Serial Device Driver is a replacement for the serial driver that is provided with the SCO
UNIX operating system, and is one hundred percent SCO UNIX compatible. It
provides the same functions as the SCO UNIX (Release 3.2) serial device driver plus the
following features:
v Support for Quatech RS-232 Asynchronous Communication Adapters, as well as,
the system board serial port.
v A flexible configuration scheme which allows any I/O address or interrupt
request number that is supported by Quatech's Asynchronous Communication
Adapters.
v Support for the National Semiconductor NS16550A device, an enhanced version
of the industry standard NS16450 device. The NS16550A offers 16 character
transmit and receive buffers that greatly reduce interrupt overhead on the CPU.
v Support for up to 40 COM ports on multiple boards/IRQs.
v The Enhanced Serial Device Driver will support a total of 5 serial adapters.
v Written in C for maximum efficiency.
DSP-100 User's Manual 44