INT 2F - BMB Compuscience Canada Utilities Interface
AH = xx (dynamically assigned based upon a search for a multiplex
number which doesn't answer installed)
AL = 00h installation check
ES:DI = EBEBh:BEBEh
Return: AL = 00h not installed
01h not installed, not OK to install
FFh installed; if ES:DI was EBEBh:BEBEh on entry, ES:DI will point
to a string of the form 'MMMMPPPPPPPPvNNNN' where MMMM is a
short form of the manufacturer's name, PPPPPPPP is a product
name and NNNN is the product's version number


2F - BMB Compuscience Canada Utilities Interface