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PCI 1 Port RS422/485
1 set of 16550-compatible registers are at I/O address 0140
Baud clock control is at I/O address 02d0
Write 0xf6 for /8 (default), 0xf2 for /4, 0xd6 for /2, 0xd2 for /1.
Note down IRQ and I/O which in this case:
The IRQ = 11
The I/O address = 0140
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
Chapter 3 Page 17
Software Setup
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