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Star Wars (Versions 1977 and 1981) [2017] |
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Summary Submitted by jim_64 on 10 December 2017
Star Wars
Game by Jim_64
Music (1981 version) by Nico
This is my first assembly program and second computer game ever. This was an unfulfilled goal of my youth, to make a video game using my favorite computer based on my favorite movie! Mostly it was a platform to learn assembly.
I purposely kept this project very simple to focus on learning assembly coding.
Restrictions (original version 1977)
- All moving objects are sprites
- 8 sprites maximum (no multiplexing)
- No interrupts, simply wait for $D012 to equal $FB before doing vblank stuff
- No word length variables, just byte length
- Cut x resolution in half by making a rule that all sprites move at least two pixels horizontally. this allowed the full screen width to be represented by one byte and made comparisons between ships x positions easy.
- Simple sounds
- Tuned for ntsc with no adjustment for pal
The code for 1977 version was completed in June of 2017 but never released. At that time, I quickly moved onto my next project (vr64 and street defender). I recently revisited this Star Wars game. the Tie fighter variables and the attack wave were updated in November 2017. in December 2017, I added music by Nico and called it the 1981 version. The thought is, I can follow George and keep experimenting with up to nine versions! :)
Version history should follow....
1977 Star Wars
1981 Star Wars - a new hope
1985 Star Wars - VHS release
1993 Star Wars - Laser disk, now 3% faster!
1997 Star Wars - Han shot second (praxis effect on death star)
2004 Star Wars - DVD (color swaps)
2006 Star Wars - DVD
2011 Star Wars - Blue ray - Han shot at same time
2015 Star Wars - Digital streaming version
A special thanks to all those who helped me get over the "hump" and learn assembler. I want to especially thank all those that helped me on my "first ml game attempt - questions!" thread on lemon64. http://www.lemon64.com/forum/viewtopic.php?p=767732#767732
Jim |
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