The Question is:
Did the DEC Alpha workstation 500a have a SCSC
The Answer is :
The Personal Workstation 500a is not supported by OpenVMS.
For details and for additional supporting information, please see
other discussions of the -a series here in the Ask The Wizard area,
discussions in the OpenVMS Frequently Asked Questions (FAQ), and
please note the omission of this system (and all other members of
the -a series) from the list of supported systems included in the
OpenVMS Software Product Description (SPD).
If you wish to research hardware configurations for older systems,
please review the pointers included in the OpenVMS Frequently Asked
Questions (FAQ) document. Specifically, the Systems and Options
Catalog (SOC) archive pointer that is included in the FAQ.
Per the SOC Archives, the Personal Workstation 500a series generally
included an integrated QLogic Wide UltraSCSI controller.
Again, this system IS NOT supported by OpenVMS, and there are no
plans to add support. There are hardware differences between
at least some of the supported -au series and the unsupported -a
series systems -- there are hardware differences between some
of the unsupported members of the -au series and the supported
-au members, as well. (The FAQ discusses one of the more common
differences in this latter case, the IDE interface hardware.)