Hardware manual

PCI VELOCITY / OPTO ISO RS422/485 Software Configuration
Chapter 3 Page 35
NEWCOM.SYS Parameters.
The NewCOM.SYS device driver included with the PCI
RS422/485 driver software is used to set up the card in DOS and
has the following syntax:
NEWCOM.SYS /A port address, /I IRQ,range /B number buffer
/S buffer /H hardware handshake
Where /A port address specifies COM port number followed by a
hexadecimal address in the form /Ax,y where x is COM
port range and y is I/O address.
/I IRQ, range specifies card interrupt and COM port range. The
COM port range specifies the COM port(s). Range may be a
single port OR a range of ports.
/B number buffer is used to set the number of pairs of
buffers to be allocated to ports and is a decimal number in
the range 1-maxport.
/S buffer Set size of all buffers in bytes, buffer is rounded
to the nearest power of 2 and must be a decimal number in
the range 32 to 32768. For any serial port opened two
buffers of size buffer are allocated, one for input and the
other for output.
/H hardware handshake selects which hardware handshake
type to use on the specified ports. This is used in the
following manner: /H range, hs where range specifies the
COM port or ports and hs selects handshake type.
Handshake types available are:
Type 0 RS232 DTR/CTS - The PC only transmits
when CTS is input true. When the PC is able to
receive its sets DTR output true. The DSR and
DCD inputs are ignored. The RTS output line