Hardware manual

PCI VELOCITY / OPTO ISO RS422/485 Software Configuration
Chapter 3 Page 37
Configuring And Installing NEWCOM.SYS
To load the Serial Solutions for DOS device driver an entry
needs to be added to the CONFIG.SYS file. Any simple text editor,
EDIT for example, can edit the CONFIG.SYS file for example. The
installation procedure given below is for a PCI RS422/485 as COM
5 - COM6.
The parameter required by the NEWCOM.SYS driver are
those returned by the BBCARDS.EXE application earlier. A brief
explanation for the parameters required by NEWCOM.SYS follows:
Port Address.
/A5-6,0140
COM ports 5 and 6 are defined, with an i/o address range
that begins at 0140h with the next port having an i/o address that is
8 higher than the previous. i.e. COM5 has an address of 0140h,
therefore COM6 will have an address of 0148h.
IRQ, Range.
/I 11,5-6
11 is the IRQ and since the COM port range is COM5 -
COM6 range is entered as 5-6.
Number Buffer.
/B6
Six buffers are defined, though only four ports are in use -
this is because buffers in DOS are assigned in a sequential order
from COM1. Since the PCI Velocity RS422/485 has been assigned
COM port values of 5 to 6, all preceding COM ports, must have
buffers assigned to them also.