Int 2F Fn 1613  - Ms-dos 7 Kernel - Get System.dat (registry File) Pathna  [D]

   AX = 1613h
   ES:DI -> buffer for full ASCIZ pathname to Windows95 SYSTEM.DAT
   CX = buffer size in bytes

Return: AX = 0000h if supported
       ES:DI buffer filled
       CX = number of bytes copied into buffer

See Also: AX=160Eh,AX=1611h,AX=1612h,AX=1614h,AX=1690h