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this should be the correct palette formula according to schematics

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This commit is contained in:
Nicola Salmoria 2008-04-13 15:43:06 +00:00
parent 02b2ba8a6d
commit 9d8d924418
1 changed files with 13 additions and 6 deletions
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19
src/mame/video/bionicc.c
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@ -131,16 +131,23 @@ WRITE16_HANDLER( bionicc_txvideoram_w )
WRITE16_HANDLER( bionicc_paletteram_w ) WRITE16_HANDLER( bionicc_paletteram_w )
{ {
int red, green, blue, bright; int r, g, b, bright;
data = COMBINE_DATA(&paletteram16[offset]); data = COMBINE_DATA(&paletteram16[offset]);
bright = 0x10 + (data&0x0f); bright = (data&0x0f);
red = ((data>>12)&0x0f) * bright * 0x11 / 0x1f; r = ((data>>12)&0x0f) * 0x11;
green = ((data>>8 )&0x0f) * bright * 0x11 / 0x1f; g = ((data>>8 )&0x0f) * 0x11;
blue = ((data>>4 )&0x0f) * bright * 0x11 / 0x1f; b = ((data>>4 )&0x0f) * 0x11;
palette_set_color (machine, offset, MAKE_RGB(red, green, blue)); if ((bright & 0x08) == 0)
{
r = r * (0x07 + bright) / 0x0e;
g = g * (0x07 + bright) / 0x0e;
b = b * (0x07 + bright) / 0x0e;
}
palette_set_color (machine, offset, MAKE_RGB(r, g, b));
} }
WRITE16_HANDLER( bionicc_scroll_w ) WRITE16_HANDLER( bionicc_scroll_w )