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Mace
Registered: May 2002
Posts: 1799 |
Ghostbyte / garbage / $3FFF
Discussion about the ghostbyte in the comment of Aliens:
Quoting Jammerso for what extent can i control this 'garbage'? in terms of chars and colours.
The ghostbyte is always black.
It occurs in the upper and lower border, when opened, but also in the 'void' that is created with an FLD routine.
If you want that effect as seen in Aliens, you have to write values to $3FFF in a raster routine.
The byte is repeated over the entire width and height of the borders, as the patterns shows.
BTW, I can't remember ever seeing a 'split raster' in $3FFF...
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Mace
Registered: May 2002
Posts: 1799 |
JackAsser... can you translate that to a language I understand, please? :D |
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Danzig
Registered: Jun 2002
Posts: 428 |
Quote: and to further extend this exciting coder dick size compo: I have found the ghostbyte myself when playing with a ripped fld routine being 14 years old, even made these pattern effects with it. anyone has better bets? :)
you explored it yesterday? that makes dick size * -1 ;) |
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Zyron
Registered: Jan 2002
Posts: 2381 |
Quote: JackAsser... can you translate that to a language I understand, please? :D
You can make cool effect! ;) |
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Hein
Registered: Apr 2004
Posts: 933 |
There is also simple but practical use, I used it in The Good, the Bad and the Ugly with split raster to create a lovely black rectangle in the top border. |
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Mace
Registered: May 2002
Posts: 1799 |
LOL @ Zyron :-) |
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Krill
Registered: Apr 2002
Posts: 2839 |
Mace: You do lda #$55 : lda #$f0 : lda #$0f and it shows this pattern: .*.*.*.*****........**** - fill a whole screen with it plus sideborder sprites and you have full-screen hires. |
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Mace
Registered: May 2002
Posts: 1799 |
@ Krill: ah, I see! Interesting. |
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Monte Carlos
Registered: Jun 2004
Posts: 351 |
Did you know, that the ghostbyte
in multicolor mode is behind / before
Sprites dependent on $d01d and the pixel combination
of a ghostbyte double pixel?
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Mace
Registered: May 2002
Posts: 1799 |
Monte Carlos, please rephrase... what do you mean with 'double pixel'? |
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Krill
Registered: Apr 2002
Posts: 2839 |
Mace: The idle byte is rendered with double-width pixels in multicolour mode. |
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