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1 General Information
The Quatech, Inc. DSCLP-100 (two-port) and SSCLP-100 (one-port)
provides upto two RS-232 asynchronous serial communication interfaces for Low
Profile IBM-compatible personal computer systems using the PCI expansion bus. The
DSCLP-100 uses Quatech's new Enhanced Serial Adapter design. Legacy serial port
data rates are limited to a maximum of 115,200 bits per second. This discussion relates
to DSCLP-100. A SSCLP-100 is just one port in the discussion.
As a PCI device, the DSCLP-100 requires no hardware configuration. The
card is automatically configured by the computer's BIOS or operating system. The two
serial ports share a single interrupt line and are addressed in a contiguous block of 16
bytes. A special interrupt status register is provided to help software to manage the
shared interrupt.
The DSCLP-100's serial ports are implemented using 16550 Universal
Asynchronous Receiver/Transmitters (UARTs). These UARTs contain hardware
buffers (FIFOs) which reduce processing overhead and allow higher data rates to be
achieved.
The DSCLP-100 is supported under several popular operating systems and
environments. Contact the sales department for details on current software offerings.
Most device drivers are available for download from the Quatech world wide web site
at http://www.quatech.com.
DSCLP/SSCLP-100 User's Manual 1