Sensoray 518 - Manual (Page 8)

7
Hardware Configuration
The coprocessor board requires installation of shorting shunts to select hardware
options. Hardware configuration must be completed before the coprocessor can be
programmed.:
default configuration from factory
Option Default
Base address 2B0 hex
PC104 Interrupts Disabled
Channel Filters Disabled
Interrupts
The 518 may be configured to interrupt the host processor in response to various
alarm and interprocessor communication events. Enabling and disabling of these
individual interrupt sources is accomplished by means of an onboard interrupt
control register. All of these interrupt sources are routed to a single PC104 bus
interrupt request line.
An option shunt must be installed to select the appropriate interrupt level if you will
be using interrupts in conjunction with 518 operation. Any interrupt level from
IRQ2 to IRQ7 may be selected. Choose an interrupt level that does not conflict with
other devices in your system, then install a shunt at that position on the 518 board.
It is not necessary to install any IRQ shunts if you will not be using interrupts.
Port Mapping
The 518 may be mapped to any four-byte address block within the range 000 to 3FF
hex. Although the board occupies a four-byte block of I/O space, it uses only the
first two address locations in the block.
To avoid addressing conflicts, you must not map the 518 into any address range
occupied by other devices. Similar to many other I/O cards, the 518 does not
decode the full PC104 16-bit I/O address -- only the low ten address bits are
decoded. As a consequence, “images” of the 518 will appear throughout the 16-bit
address range at intervals of 400H bytes. You should ensure that these images do
not conflict with other devices.
Option shunts E1 through E8 are used to select the 518 base address. Shunts are
factory set to locate the board at base address 2B0H. This address should not
conflict with any standard I/O address assignments. If you require a different base
address, use the following table to determine the correct shunt programming for
your target base address.
I/O address jumpers