Int 16 Fn F0F0  - Turbopower Tsrs - Installation Check                     [t]

   AX = F0F0h

Return: AX = 0F0Fh if installed
       ES:DI -> last data block in TSR list

Note:  the returned TSR list provides support for communication among TSRs
     built with TurboPower's Turbo Professional and Object Professional
     libraries for Turbo Pascal

See Also: AX=E0E0h

Format of data block:
Offset Size    Description
 00h   DWORD   pointer to program tag (counted ASCII string)
 04h   WORD    interface version number (0400h)
 06h   DWORD   pointer to command entry point
 0Ah   DWORD   pointer to previous data block (0000h:0000h if none)
 0Eh   DWORD   pointer to next data block (0000h:0000h if none)
---swappable TSRs only---
 12h   DWORD   pointer to swapping data
 16h   DWORD   pointer to user data
   more???