Endian Issues; Table 2-4. Classes Of Reset And Effectiveness - Motorola MVME2603-1121A Installation And Use Manual

6. The VMEbus
7. VMEbus Reset sources from the Universe ASIC (PCI/VME
The following table shows which devices are affected by the
various types of resets. For details on using resets, refer to the
MVME2600 Series Single Board Computer ProgrammerÕs Reference
Guide (part number V2600A/PG).

Table 2-4. Classes of Reset and Effectiveness

Device Affected
Reset Source
Power-On reset
Reset switch
Watchdog reset
VME SYSRESET∗signal
VME System SW reset
VME Local SW reset
VME CSR reset
Hot reset (Port 92)
PCI/ISA reset

Endian Issues

The MVME2603/2604 supports both little-endian (e.g., Windows
NT) and big-endian (e.g., AIX) software. The PowerPC processor
and the VMEbus are inherently big-endian, while the PCI bus is
inherently little-endian. The following sections summarize how the
MVME2603/2604 handles software and hardware differences in
big- and little-endian operations. For further details on endian
considerations, refer to the MVME2600 Series Single Board Computer
ProgrammerÕs Reference Guide (part number V2600A/PG).
SYSRESET
bus bridge controller): the System Software reset, Local
Software Reset, and VME CSR Reset functions
Raven
Processor
ASIC
√ √
√ √
√ √
√ √
√ √
√ √
√ √
√ √
Operating Instructions
∗ signal
Falcon PCI
Chip Set Devices Devices
√ √
√ √
√ √
√ √
√ √
√ √
√ √
√ √
√
VMEbus
ISA
(as system
controller
√ √
√ √
√ √
√ √
√ √
√
√
√
√
2-13
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