rtd cpuModule CMX147786HX, User Manual

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CMX147786HX RTD Embedded Technologies, Inc.
101
erratic operation excessive bus loading reduce number of PC/104 modules in
stack;
remove termination components from bus
signals;
remove any power supply bus termina-
tions
power supply noise examine power supply output with oscillo-
scope; glitches below 4.75Vdc will trigger
a reset; add bypass caps
power supply limiting examine power supply output with oscillo-
scope; check for voltage drop below 4.75V
when hard drive or floppy drive starts; add
bypass caps
temperature too high add fan, processor heatsink, or other cool-
ing device(s)
memory address conflict check for two hardware devices (e.g.
Ethernet, SSD, Arcnet, PCMCIA) trying
to use the same memory address
check for two software devices (e.g.
EMM386, PCMCIA drivers, etc.) trying to
use the same memory addresses
check for hardware and software devices
trying to use the same memory address
check for an address range shadowed (see
Advanced Setup screen) while in use by
another hardware or software device
I/O address conflict check for another module trying to use I/O
addresses reserved for the cpuModule be-
tween 010h and 01Fh
check for two modules (e.g. dataModules,
PCMCIA cards, Ethernet) trying to use the
same I/O addresses
keyboard does not work keyboard interface damaged
by misconnection check if keyboard LEDs light
wrong keyboard type verify keyboard is an 'AT' type or switch to
'AT' mode
floppy drive light always on cable misconnected check for floppy drive cable connected
backwards
two hard drives will not
work, but one does both drives configured for
master set one drive for master and the other for
slave operation (consult drive documenta-
tion)
floppy does not work “data error” due to drive up-
side down orient drive properly (upright or on its
side)