Quatech DSCLP-100 - Manual (Page 6)

1 General Information
The Quatech, Inc. DSCLP-100 (two-port) and SSCLP-100 (one-port)
provide 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 manual
usually refers to the DSCLP-100. All information pertains equally to the
SSCLP-100, with the exception that with the SSCLP there is just one port instead
of two.
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.
6 DSCLP/SSCLP-100 User's Manual