The default for this unit, was all drives jumpered as CS.

But not required or necessary. A single HDD installed jumpered either as
Master or CS would be recognized and performance would be the same. You don't
select "Master/Slave" or "Cable Select" in the BIOS--the type of recognition is
determined by the data ribbon used, and CS is only different if it has a third
connector for a second HDD. And a cut or missing 28 pin or wire, as I
understand it....

You can install two HDDs as Master and Slave in any Compaq, as long as you use
the correct data ribbion cable, and not a CS one. Compaqs were not by
"default" CS, or anything else--they were CS because Compaq installed CS data
ribbon cables and jumpered the HDDs CS.

That's how I've come to undersand it. Perhaps I'm wrong?

Dale