Interrupts
In addition to standard interrupt levels IRQ2 through IRQ7, the card also supports higher
interrupts (IRQ10 through IRQ15 except IRQ13 reserved by other hardware). Use PCIFind.EXE
to determine the IRQ that was assigned to the card by the BIOS or Operating System.
Alternatively, in Windows 95, the Device Manager can be used. The card is listed under the Data
Acquisition class. Selecting the card, clicking Properties, then selecting the Resources tab will
show the base addresses and IRQ assigned to the card.
Figure 3-2:
Option Selection Map
Jumpers
232,422:
Select communications mode;
Single ended (RS232) or Differential (RS422/485)
TERM:
Terminate
RS422/485
receiver
lines
BIAS:
Apply bias to RS422/485 receiver lines
CLK X1/ CLK X4:
Select either 115.2 Kbaud or 460.8 Kbaud maximum.
RTS (A/B):
Use manual RTS RS485 transceiver control (For port A or B)
AUTO (A/B):
Use automatic RTS RS485 transceiver control (For port A or B)
ECHO (A/B):
Locally echo characters (2-wire RS485 only) (For port A or B)
Manual PCI-COM-2S
13
