The Rough Guide to MBus Modules
Introduction Buses Modules Systems Chips Miscellany

Super COMPstation-7/7+


Basic Issues

The CS7 system bus is a 40MHz MBus with a 1 slot for a plug-in MBus module.

Speculation: the motherboard may be a GCS Mongoose board.

Double-width modules might not fit in the CS7.


Firmware Versions

Older systems may require BootPROM upgrades to be able to use newer MBus modules. Where known, the minimum BootPROM level is listed in the module configuration table.


Overheating

As I am unfamiliar with the internals of the CS7 chassis, and the cooling arrangements, it is not possible to exactly specify the overheating risks; due to the low-profile chassis, caution is advised.


MBus Module Configuration Table

Specific part-numbers are only listed where significant.

See also: General Module Configuration Rules, which also covers mixed-module configurations.

Note: some configurations have particular caveats, such as failing to provide the level of performance that one might intuitively expect, or dangerous overheating, and so on. Such configurations are marked with a footnote-number in square brackets.

Module Type No. of
(identical)
Modules
Functional? Min. PROM level
CYM6001K
SM100
1 unknown unknown
2
SM20
SM21
SM30
1 unlikely unknown
2 no
SM40 1 yes unknown
2 no n/a
SM41
(33MHz)
501-2318
1 unlikely unknown
2 no
SM41
501-1714
501-2258
501-2270
501-2359
1 yes unknown
2 no
SM52
SM52X
1 unknown  [1] unknown
2 no
SM520 1 unknown  [1]  [4] unknown
2 no
SM521 1 no n/a
2
SM50
SM51
SM61
1 yes unknown
2 no
SM51-2
SM61-2
1 unknown  [3] unknown
2 no
SM71
SM81
1 unknown  [5] unknown
2 no
SM81-2
SM91-2
1 unknown  [3]  [5] unknown
2 no
HMx1S-256 1 no n/a
2
HM55any-256
HM66any-256
HM72any-256
HM80S-256
HM90any-256
HM100S-256
HM100D-256
HM110any-256
HM125any-256
1 yes unknown
2 no
HManyS-512
HManyD-512
HManyS-1024
HManyD-1024
1 unknown  [2] unknown
2 no
HManyW-256
HManyW-512
HManyW-1024
1 unknown  [1]  [2] unknown
2 no

Footnotes:
1.
Double-width modules may not physically fit.
2.
It is unknown whether RT620C- or RT620D-based modules are supported by any available system PROM revision.
3.
Only 1Mb of the 2Mb per-module cache memory would be used.
4.
If it works at all, the SM520 might only behave as a single-CPU module.
5.
It is unlikely that SuperSPARC-II modules are supported by any available system PROM revision.

Introduction Buses Modules Systems Chips Miscellany
Mike Spooner, revised 3rd November 2003