Arcom TARGET386EX, User Manual

Page: 27 / 52

Section 5. Troubleshooting
2192-08270-000-000 Section 5. Troubleshooting
J539 TARGET386EX
Page 27
Problem Suggestions
• No monitor sign-
on message on
terminal when
running with SVIF1
• Can’t access dual
port RAM from
STEbus
• Can’t access
STEbus peripheral
board
Can’t access PC/104
peripheral board
• Check connections to correct COM port
• Check links in default positions especially LK19
(should be fitted)
• Check baud rate, stop bits and parity of terminal
• Check power on board - red surface mount LED
should be lit
• Check base address and DPR size selection on
LK7, LK4 and LK5
• Check board is in STEbus slave mode (General
control register 1)
• Check no other boards in system use same
STEbus Memory window as DPR
• Check TARGET386EX is not in reset state
• Check board is in default or potential master
mode. If in potential master mode check that
there is an STEbus default master in the system
to do the bus arbitration
• Check that SYSRST* is being driven on power-
up by one board only in the system
• Check that SYSCLK* is being driven by only one
board in the system
• Check that STEbus address range being accessed
is available off-board (is it covered by one of the
on-board memory or peripheral chip selects)
•
Is the STEbus the default bus (see General
Control Register 1), if not check that at least one
of chip selects CS3-6 been set up to cover the
required address range
•
Is the address range being accessed available to
the PC/104 bus - is it covered by one of the on-
board peripheral chip selects
•
Is PC/104 the default expansion bus (see General
Control Register 0), if not check that at least one
of the chip selects CS3-6 has been set up to cover
the required address range
• Is the PC/104 board correctly plugged on to
the board
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