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 segofftoulong()     Read a ulong value from a segment/offset address
------------------------------------------------------------------------------
 Declaration
   memory.hdr

 Syntax
   func ulong segofftoulong extern
   param value uint uSegment, ;
         value uint uOffset

 Arguments
   uSegment is a segment address.
   uOffset is an offset address.

 Return
   A ulong value.

 Description
   This function returns the ulong located at the specified memory address.

   The function is included for compatibility with earlier Force versions.
   Use the ptr() data type in conjunction with the & and * operators for
   directly writing to explicit memory addresses.

 Example
   #define EXAMPLE_MEMORY
   #include example.hdr

   // Retrieve timer clock value from BIOS data area
   
   proc Test_segofftoulong
   vardef
      ptr( ulong ) pMem
   enddef
   ? segofftoulong( 0x40, 0x6c )   // get value using function call
   pMem := 0x0040006c              // get value using pointer
   ? *pMem
   endproc

   proc main
   Test_segofftoulong()
   endproc