Installation Considerations - Motorola MVME2301 Installation And Use Manual

8. Replace the chassis or system cover(s), cable peripherals to
9. The MVME230xÕs green

Installation Considerations

The MVME230x draws power from the VMEbus backplane
connectors P1 and P2. P2 is also used for the upper 16 bits of data in
32-bit transfers, and for the upper 8 address lines in extended
addressing mode. The MVME230x may not function properly
without its main board connected to VMEbus backplane connectors
P1 and P2.
Whether the MVME230x operates as a VMEbus master or as a
VMEbus slave, it is configured for 32 bits of address and 32 bits of
data (A32/D32). However, it handles A16 or A24 devices in the
address ranges indicated in Chapter 4. D8 and/or D16 devices in
the system must be handled by the PowerPC processor software.
Refer to the memory maps in Chapter 4.
The MVME230x contains shared onboard DRAM whose base
address is software-selectable. Both the onboard processor and off-
board VMEbus devices see this local DRAM at base physical
address $00000000, as programmed by the PPCBug firmware. This
may be changed via software to any other base address. Refer to the
MVME230x programmer's reference guide for more information.
If the MVME230x tries to access off-board resources in a
nonexistent location and is not system controller, and if the system
does not have a global bus timeout, the MVME230x waits forever
for the VMEbus cycle to complete. This will cause the system to lock
up. There is only one situation in which the system might lack this
global bus timeout: when the MVME230x is not the system
controller and there is no global bus timeout elsewhere in the
system.
the panel connectors as appropriate, reconnect the system to
the AC or DC power source, and turn the equipment power
on.
confidence tests is run, and the debugger prompt
appears.
Installing the MVME230x Hardware
LED indicates activity as a set of
CPU
1
PPC1-Bug>
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