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Designing a Target System
Motorola MVME 160X, Ultra, Atlas and Series E Target Boards
Motorola MVME 160X, Ultra, Atlas and Series E Target
Boards
These boards have an unpopulated header location for installing the 16-pin
connector.
A resistor change is required to pull QACK low. The 1KΩ resistor on the
QACK signal which goes between the MPC603 and the MPC105 must be
changed to 10Ω. This is recommended as a short term modification for use
with the HP processor probe. The 1KΩ resistor should be replaced for
normal operations when the HP processor probe is no longer needed. For
the MVME1603 series PM603 module this resistor is R27 on the 8018F,
8019F, 8100F and 8101F artwork. For the Atlas it is R42 on the Rev B 8115F
artwork. For the Ultra, it is R10 on the 8107D and later artwork.
These boards use DRTRY mode, so the configuration entry cf drtry=on must
be used if either cache is enabled. The standard boot roms that come with
these boards enable the instruction cache (register HID0=00008000) so right
out of the box, memory reads and writes will not work correctly and may
corrupt the communications between the target board and the HP processor
probe unless cf drtry is set to on or the cache is disabled.
The reset lines connected to the JTAG connector drive reset to other devices
besides the CPU. This is in violation of the HP processor probe target system
requirements. The consequence of this is the boot code that initializes the
DRAM controller must be run from physical ROMS on the board before
memory reads and writes will work. The cf reset=runrom setting must be
used for correct operation of this board with the HP processor probe and
valid boot ROMS that initialize the DRAM controller must be installed.
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