Silicon Graphics CHALLENGE L, User Manual, Page: 149 / 164

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Appendix E
E. Challenge VMEbus Implementation
This appendix provides information to help users select third-party VME
boards for the POWER Challenge and Challenge systems.
You may also wish to consult related books such as the following for
additional background, as required.
• VMEbus Users’s Handbook by Steve Heath
• Writing Device Drivers (P/N 007-0911- xxx )
Warning:
All board installations or removals should be performed only
by Silicon Graphics trained or certified personnel. Unauthorized access to
the cardcage area could result in system damage or even bodily harm, and
could void warranty or safety agency approvals for the system.
General Information
The VME interface in the Challenge system supports all protocols defined in
Revision C of the VME specification, plus the A64 and D64 modes defined
in Revision D. The D64 modes allows direct memory access (DMA)
bandwidths of up to 60 MB.
Note:
The Challenge system does not support VSBbus mode.
For the acceptable VME address ranges, read the /var/sysgen/system file.