Thanks to TEDDYSTACKER for

           Stack Up from Zeppelin

The aim of stack up is to guide the falling groups of blocks so that they
form horizontal ,vertical or diagonal lines of more than three of the 
same colour . Once this " stack " has been made , the blocks disintergrate
earning points .

As the blocks fall from the top of the frame , pressing SWOP allows the
colours to exchange positions.

The next block to fall is also displayed on the screen , so it is worth 
bearing that colour formation in mind before placing the falling blocks .

As you stack up to higher frames , the falling blocks get faster , and
the puzzles become more difficult .

If your stack reaches the top of the screen , the frame is declared void
and you lose your credit .

As the game progresses , various new playing blocks can be selected by
pausing and selecting the following :

 1 . weather symbols
 2 . road traffic signals
 3 . food symbols
 4 . outer space signs

Stack up is split into 22 rounds , each of which has a target number of
lines that must be reached before play can progress to the next level .
After a successful round you are awarded CLEAR BONUS , plus a SPACE BONUS
depending on how much empty space is left on the screen .

As higher levels are reached :

 - frames are started with blocks already in them 
 - blocks appear randomly on the screen ( programmed by the reps ! )
 - only diagonal lines count towards your target levels
 - left and right controls may be become reversed ! ( ghost virus 12 ?? )
 - black blocks will fall that cannot disintergrate

BASIC SCORING 

Each group of three blocks placed in frame : 50 points
Vertical line of three : 200 points
Horizontal line of three : 500 points
Diagonal line of three : 1000 points

EXTENDED SCORING 

line of four : scores double and counts as two
line of five : scores triple and counts as three
line of six : scores quadruple and counts as four

CHAIN REACTIONS

first step : single score 
second step : all lines are worth double
third step : all lines are worth triple 

ok docs supplied by MCA and wordprocessed by SLEDGE/HOTLINE !