class AliTRDrawData: public TObject

 Default constructor

 Copy constructor

 Destructor

 Initialize necessary parameters and call one
 of the raw data simulator selected by SetRawVersion.

 Currently tracklet output is not spported yet and it
 will be supported in higher version simulator.

 Raw data simulator for all versions > 0. This is prepared for real data.
 This version simulate only raw data with ADC data and not with tracklet.

 This function generates
 	 1) SM index words : ssssssss ssssssss vvvv rrrr r d t mmmmm
 	    - s : size of SM header (number of header, default = 0x0001)
 	    - v : SM header version (default = 0xa)
 	    - r : reserved for future use (default = 00000)
 	    - d : track data enabled bit (default = 0)
 	    - t : tracklet data enabled bit (default = 1)
 	    - m : stack mask (each bit corresponds a stack, default = 11111)

 	 2) SM header : rrr c vvvv vvvvvvvv vvvv rrrr bbbbbbbb
 	    - r : reserved for future use (default = 000)
 	    - c : clean check out flag (default = 1)
 	    - v : hardware design revision (default = 0x0404)
 	    - r : reserved for future use (default = 0x0)
 	    - b : physical board ID (default = 0x71)

 	 3) stack index words : ssssssss ssssssss vvvv mmmm mmmmmmmm
 	    - s : size of stack header (number of header, (default = 0x0007)
 	    - v : header version (default = 0xa)
 	    - m : link mask (default = 0xfff)

 	 4) stack header : vvvvvvvv vvvvvvvv bbbbbbbb rrrr rrr c
 	    - v : hardware design revision (default = 0x0404)
 	    - b : physical board ID (default = 0x5b)
 	    - r : reserved for future use (default = 0000 000)
 	    - c : clean checkout flag (default = 1)

 	 and 6 dummy words(0x00000000)

 This function re-assign stack mask active(from 0 to 1) in the SM index word

 This function add stack index words and stack header when there is data for the stack

   1) stack index words : ssssssss ssssssss vvvv mmmm mmmmmmmm
      - s : size of stack header (number of header, (default = 0x0007)
      - v : header version (default = 0xa)
      - m : link mask (default = 0xfff)
      - m : link mask (starting value = 0x000)

   2) stack header : vvvvvvvv vvvvvvvv bbbbbbbb rrrr rrr c
      - v : hardware design revision (default = 0x0404)
      - b : physical board ID (default = 0x5b)
      - r : reserved for future use (default = 0000 000)
      - c : clean checkout flag (default = 1)

   and 6 dummy words(0x00000000)

 This function re-assign link mask active(from 0 to 1) in the stack index word

 This function shifts n words

if ( nStart+nWords > sizeof(buf)/sizeof(UInt_t) ){
  AliError("Words shift failed. No more buffer space.");
  return kFALSE;
}

 This function produces the raw data for one HC, i.e. tracklets, tracklet endmarkers,
 raw data, raw data endmarkers.
 This function can be used for both ZS and NZS data

 Vx of the raw data reading

 write tracklet end marker(0x10001000)
 and half chamber headers(H[0] and H[1])