Hardware Reference
In-Depth Information
Figure 2.30
Base address selection for the Dual-422
REM COM2 will be associated with channel 2
OPEN "COM1:4800" AS #l
OPEN "COM2:4800" AS #2
REM Enable COM1: RS-485 driver
OUT &H3FF, 2
REM Enab1e COM2: RS-485 receiver
OUT &H2FF,1
REM Transmit data via COM1:
PRINT #1, T$
REM Receive data via COM2:
INPUT #2, R$
REM Close communication channels
CLOSE
Arcom APCI-ADADIO multifunction I/O card
The Arcom APCI-ADADIO is a 32-bit PCI card which provides eight differen-
tial (APCI-ADADIOCD) or 16 single-ended (APCI-ADADIOCS) multiplexed
analogue inputs, two analogue outputs, 16 digital I/O lines, and three counter
timer channels. All I/O signals are routed to a 50-way D-type connector which
conforms to Arcom's standard signal conditioning system (SCS).
The range of features available from a single PCI card makes the APCI-
ADADIO an excellent and highly versatile choice for use in modern control
and data acquisition applications. The card is Plug and Play compatible and it
uses a single chip PCI bus slave controller which is designed and manufactured
by PLX Technology.
During power-up system initialization the PCI BIOS will detect the card and
assign a unique I/O address and interrupt line. This ensures that there are no
resource conflicts on the PCI bus. Multiple cards are supported by this method
without the need for address decoding links.
