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1998-05-13
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9K SPACE INVADERS VERSION 1.1
September 17, 1995
CHRONOLOGICAL RELEASE NOTES
Version 1.0 - August 17, 1995
-----------------------------------------------------------------------------
- Initial release - No known bugs
Version 1.1 - September 17, 1995
-----------------------------------------------------------------------------
- Invaders would stop shooting on the higher levels - FIXED.
- I discovered this one during a paricularily good game at school during
class [snicker].
A number is picked at random, and if it is 2, one of the invaders is
selected to fire. The number picked is the shot frequency, which is
decreased every level. Eventually, it reaches 2, which is the maximum
frequency (the random number 2 shows up every time, and the invaders
fire constantly).
Unfortunately, the number gets decreased below this value to 0, selecting
a random number between 0 and 0, thus 2 never shows up, and the invaders
stop shooting. It was a simple fix.
- Time reset to midnight during game play - FIXED.
- I can't believe I didn't notice this! Dumb dumb dumb!
Thanks to Patrick A Springman for mentioning this one to me.
The game uses the real time clock for simple timing of the title
screen delays, printing delays, etc. When the game uses this timer,
it reset the timer to 0, then watched it until it reached a particular
value. The problem is, resetting this timer to 0 also resets the clock
to midnight.
The time change wasn't a permanent change. Once the machine was rebooted,
the timer is reinitialized with the CMOS clock value, and everything
returns to normal, but it was annoying anyway.
The game no longer adjusts the timer, rather it reads the current time
into a variable, adds the delay value to that variable, then watches
the timer until it reaches this calculated time.
It's better, but does cause some time inconsistancies. Mostly with the
amount of delay the title screens are displayed for - It doesn't seems to
affect the game play timing (as expected).
- Added high score functions, and rearranged title screens so score is always
visible.