****************
Collision Course
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=======================
changes from 1.0 to 1.1
=======================

---------
build.bat
---------

-funroll-all-loops added

-O3 changed to -O2

------
fast.c
------

all functions that access video RAM moved here

DrawLine() function now does clipping

VideoTable added

------
game.c
------

ufo now appears at random intervals (between a min and max value) instead of
having a chance of appearing with every pass through the game loop

frequency of ufo fire reduced

all sound code moved to "sound" subdirectory; new sound mixing code

display mode changed from 3 to 4 and double-buffering system added

many optimizations

list of high scores added



=======================
changes from 1.1 to 1.2
=======================

-------
assem.s
-------

sound mixing buffer cleared with assembly instead of dma

------
game.c
------

number of vertexes for ROCK3_TYPE and EXPLODE_TYPE reduced

EXPLODE_TYPE objects appear at random angles

------
fast.c
------

DrawText6x8() optimized

DrawLine() optimized and changed from clipping to boundary testing
