78 lines
2.6 KiB
Markdown
78 lines
2.6 KiB
Markdown
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# 6502 Linux Logo
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Optimized Linux Logo in 6502 assembly language for size.
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Size: 625 ($271) bytes
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# Screenshots
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![Apple \]\[ ](pics/linux_logo_2.png)
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![Apple \]\[+](pics/linux_logo_2plus.png)
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# Features
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* Detects Apple \]\[, \]\[+, //e, //e+, //c, //c+
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* Pretty-print model instead of generic `II` (bloats the code slightly but worth it.)
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* Detects 48K/64K/128K
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* System information in all uppercase (for Apple \]\[ without lowercase)
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* Cleaned up fugly logo by Albert Lai
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* Logo is now 70 chars wide
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* Logo is bit packed 2 bits/char; expands 70 chars * 4 px = 280 px
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* Logo takes up 70\*12\*2/8 = 210 bytes compared to 79*12 = 948 bytes
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* X is now symmetrical
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* Fixed L,i,n kerning
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* Fixed x Penguin kerning
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* Fixed L to fit
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* Chopped off 2 columns of penguin to fit 70 chars
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* Red 'i' is now a beautiful blue to break up the monotomy of all orange
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```
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..........................................................#####.......
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.........................................................#######......
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...............@.........................................## # ##......
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######........@@#........................................#QQQQQ#......
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..##...........#.......................................##..QQQ..##....
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..##.......@@@..###.####...###....###..#####.#####....#..........##...
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..##......@..@#..###....##..##.....##....##...##.....#............##..
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..##.....@...@#..##.....##..##.....##.....##.##......#............###.
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..##........@@#..##.....##..##.....##......###......QQ#...........##Q.
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..##.....#.@@#...##.....##..##.....##.....##.##....QQQQQ#.......#QQQQQ
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..##....##.@@#.#.##.....##..###...###....##...##...QQQQQQ#.....#QQQQQQ
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##########..###.####...####...####.###.#####.#####..QQQQQ#######QQQQQ.
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```
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See: [ascii2hgr2bit.c](ascii2hgr2bit.c) for packing ASCII to 2 bits/char.
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NOTE: PackedLen isn't needed if full 40 bytes HGR width is unpacked to.
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Inspired from non-optimized version. Size: 1,573 ($625) bytes
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* https://github.com/deater/linux_logo
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Note: Lowercase doesn't display properly on \]\[.
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![Apple \]\[+](pics/ll_6502_2plus.png)
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The 79x12 logo that was used as the basis for the logo cleanup:
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# License
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[WTFPL](http://www.wtfpl.net/)
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If you use code, please provide a comment link so people can follow it for updates.
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# Tools used
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* [Merlin32](brutaldeluxe.fr/products/crossdevtools/merlin/)
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# Credits
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* qkumba for his excellent optimization tips and tricks
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* Mike B. for Text to HGR Page 1 optimization
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