This is the History as it appeared in Joel Jordan's Port
I am somewhat confused about the exact history; It seems like
someone else (several other people?) have worked on Tetris too...
But I don't know how their work applies to this port (if at all).

History
-------
		
Version         Date            Comments
	      (dd/mm/yy)
=======         ====            ========
0.50        10/15/98     It works!  More than that, I can't say

0.60        10/16/98     Fixed title screen, level select, keys mapped
                         correctly, High score table

0.61        10/25/98    Changed keys around a bit.

0.70		11/1/98 	Added two player support.
				Graphics data fixed (no clipping
				at bottom of sprites)

0.71		6/15/99	No big change. Just recompiled for current
				versions of PlusShell and DoorsOS (jdratlif@indiana.edu)

0.72		12/7/99	Added compatibility with new roms
				Some minor bugfixes (b.lesteven@wanadoo.fr)

0.75		29/9/00	fixed highscores on ROM 2.0x
				grayscales work on HW2 (b.lesteven@wanadoo.fr)

1.30		26/9/01	fixed some bugs on HW2
				runs at the same speed on HW1 and HW2

1.40		30/7/02	Ported To NOSTUB mode -- no longer dependant on Kernels
				(Greg Dietsche - gforce@calc.org)

1.50		01/8/02	Fixed the Teacher key so it returns to the AMS instead
				of turning the calc off; When the calc is turned back on,
				the game enters pause mode.  Added code to save and
				restore the high scores in a hidden variable. Compressed the 
				executable (ppg) Keypress used for Pause is no longer echoed
				into the normal game play loop.
				Fixed the key bounce problems by overriding auto-int5? (or are they still there?)
				(Greg Dietsche - gforce@calc.org)
 
1.51		08/24/02	Key bouncing is nearly eliminated, but still happens on rare occasions.
				Various Size optimizations (Greg Dietsche - gforce@calc.org)

1.52		10/08/02	Fixed the "SCORE" becomes "yyyRE" bug on the TI-89 thanks to Yan Zhang
				(Greg Dietsche gforce@calc.org http://gforce.calc.org and http://calc.gregd.org )


