Enterprise Forever
:UK => Enterprise DevCompo => Enterprise DevCompo #2 => Topic started by: g0blinish on 2017.April.24. 17:28:50
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ye olde algo xD
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Looks cool, tomorrow i will download it and watch on emulator also :-)
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Very good effect!
Thanks.
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I think some values for LPT must be fixed:
C000: character map
C400: font data ($C400/128 = $188)
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fixed&improoved
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One hint: if you use EXOS LPT then you can use 27 character lines + status line = 28 total lines.
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cool effect. I use this in my demo, but with rotating dots: https://youtu.be/5Eg14WLJmEk?t=329
try it with mixing this shade effect with some rotating.
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Same effect with Ork used at ZX Spectrum at demo what name I forgot. I am afraid tile data over 256 bytes.
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And I used same effect:
http://www.pouet.net/prod.php?which=68499
(caution:some boobs at screen)
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https://youtu.be/5TcsC1cVDoQ
dith256.com - 237 bytes
One minute of dith256.avi for YouTube - 1 665 778 644 bytes
:lol:
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If you have time, you can try it with 4 colour character mode with half horizontal resolution also, I think it would be also very impressive :)
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If you have time, you can try it with 4 colour character mode with half horizontal resolution also, I think it would be also very impressive :)
yes! and you can use GraCha editor for drawing the characters.
but not only 4 colors, 2*4!
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If you have time, you can try it with 4 colour character mode with half horizontal resolution also, I think it would be also very impressive :)
[attachurl=1]
[attachurl=2]
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Looks cool :)
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fixed&improoved
One hint for getting bit more CPU and speed, if you set port 0bfh to 0ch then waits are eliminated :)
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5 colors:
[attachurl=1]
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5 colors:
(Attachment Link)
Better than I expected :)
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The optimization could be better, creating the character set takes up the majority of the code. :oops:
Edit: it could also be simplified by reducing the character height to 8 pixels, that way the dither has a tile size of 4*8 instead of 4*9, or even 4*4 (the lower half of the character is the same as the upper) which is ideal for 16 levels.
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I have another little algorithm for generating dither, but generation of 128 chars takes same space.
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Some optimizations allowed for saving 12 bytes, leaving enough space for synchronization to vertical blanking:
[attachurl=1]
Another modified version with 8 pixel character height, 40x28 screen, EXOS compatible reset routine, and some other minor changes:
[attachurl=2]
The effect can be changed with some minor edits, for example:
A 0167 16 0E LD D, 0E
A 0178 15 DEC D
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Another modified version with 8 pixel character height, 40x28 screen, EXOS compatible reset routine, and some other minor changes:
dith256_8.out
Video on Zozosoft request
https://youtu.be/tmma1KatmlY