B&B Electronics RS-232/422/485 Serial Card CE 3PXCC4A - Manual (Page 9)

Manual Document# 3PXCC4A3001 7
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445
Scroll through the list, check 03F8H, 02F8H, 03E8H, 02E8H. If
one of these is available, use it. If not, check alternates.
Find a free address in the list. Most desktop PC’s have a COM1
and possibly a COM2 already on their system which will be seen in
the list. You might have to start at COM3 or COM4 to begin
addressing the ISA card. If these addresses are used you may have
to resort to the Frequently Unused Port Addresses (found in Chapter
4, Table 3) of this manual. Write these open addresses and IRQ’s
down for later reference.