Casio Game Calculator (MG-880) - Digital Invader Simulator
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This is a Freeware.  You can freely distribute it provided that including this readme.txt file.

Help is needed to Complete this simulator.
If anybody have this Calculator, Please contact me.
I need a Top-View Image, sound sample of this calculator and
other important information such as scoring to continue this project.

Feature to be Implemented in the Future: 

Accurate Speed of Different Levels 
Original Scoring
Full Image View of Original Calculator 
LCD Style Display 
Sound Support 
User Defined Key 
Real Original Calculator Functions ??!!   gone too far :) 

Version History:

0.02 (16 Oct 1999):

- Add Scoring (Not Exactly Same as the Original Scoring) 
  UFO : 300 points
  Digit : 10 points
  (I know that the Point of UFO depend on its Position and No. of UFO Eliminated in a Row, I need more info on it)

- Add Levels.  There are 16 Invaders per Level and Speed will increase in each Level
- Add Count of Miss Fire and Land.  30 Miss Fire and 3 Land Per Level will lead to Game Over
- Add About Screen
- Change Control Keys

0.01 (12 Oct 1999): 

- First Release
- An UFO will Appear when the Remainder of Dividing the Sum of Eliminated Digits by 10 is 0

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Email : kinghong@netvigator.com
URL : http://home.netvigator.com/~kinghong/casio.html