Quatech RS-422 - Manual (Page 25)

Figure 13--- Windows 95 Device Manager
6. The DSCLP-200/300 serial ports are also listed under the group Ports (COM
and LPT). Windows 95 does not assign COM1-COM4 to ports addressed at
nonstandard locations. The DSCLP-200/300 ports will be enumerated starting
with COM5 (or higher) even if lower logical numbers are available.
7. Select any of the Quatech Serial Ports listed under the group Port (COM and
LPT) and click the "Properties" button. This action opens a properties dialog
for the specific COM port on the DSCLP-200/300.
8. Click the "Port Settings" tab and then click the "Advanced" button. The
DSCLP-200/300 driver will display a custom Advanced Port Settings control,
which allows the ports UART compatibility mode and FIFO threshold levels to
be configured. The threshold values of full-scale for the transmit buffer and
3/4-scale for the receive buffer shown below are optimal for most applications.
Note that the FIFO option for each of the DSCLP-200/300's two ports is
configured independently.
20 DSCLP/SSCLP-200/300 User's Manual