JP>> There are two sorts of VDDs, "base" VDDs and "installable" VDDs.  The
 JP>> "base" VDDs are always loaded, since they are essential to the
 JP>> operation of a VDM.  The "installable" VDDs are the ones listed in
 JP>> CONFIG.SYS .

 ET> I don't know, I never looked into this.

I have, and you do now.  (-:

 JP>> There's a list of the "base" VDDs in the Virtual Device Driver
 JP>> Reference in the OS/2 DDK.

 ET> I don't think I have the OS/2 DDK. Is that available on internet?

http://service.software.ibm.com/ddk/

 ¯ JdeBP ®

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