RTD Embedded Technologies, Inc.
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16
DMx820 User’s Manual
Solder Blob B1
–
Force Three Master
The DM7820HR offers a configuration solder blob at location B1. If this solder blob is open (the default), the board supports bus mastering in
all 4 PCI slots when SW1 is in position 0-3. If it is closed, the board will work in a 3 bus master configuration. If B1 is closed, SW1 positions 0-
3 will be identical to positions 4-7.
NOTE: The DM7820HR comes with solder blob B1 open by default. This
should be compatible with most PC/104
-Plus
CPUs. There is no need
to change this blob unless you are having compatibility problems with
your specific CPU.
PC/104 ISA Connectors (DM7820HR Only)
The PC/104 connectors carry the signals of the PC/104-Plus ISA bus. Refer to PC/104-Plus Specification Revision 1.0 for the pinout of this
connector. This is a pass-through connector. The DM7820HR connects to the power and ground pins only, and does not use any of the
signals.