INT 63 - DESQview/X - SOCKET API
Notes:  parameters are passed by patching!! data field immediately following
          the entry point, as detailed below; the preferred method for calling
          the socket API is via INT 15/AX=DE2Eh
        the installation check consists of testing for the string "dvxunix"
          (yes, lowercase) at offset 9 from the interrupt handler start
SeeAlso: INT 15/AX=DE2Eh,INT BE"DESQview"
Index:  installation check;DESQview/X socket interface

Format of interrupt handler entry:
Offset  Size    Description
 00h  3 BYTEs   near jump or short jump + NOP to actual interrupt handler
 03h    WORD    offset from following pointer for initial top of local stack
 05h    DWORD   pointer to argument/stack block (see INT 15/AX=DE2Eh)
 09h  7 BYTEs   signature "dvxunix"

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