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Preliminary implementation of the Seibu COP palette brightness mode 4, used by Denjin Makai fade in/out effects [Angelo Salese]

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Angelo Salese 2011-01-05 19:29:40 +00:00
parent bdb014dc15
commit 74b2e94cc8
1 changed files with 26 additions and 4 deletions
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30
src/mame/machine/seicop.c
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@ -2643,7 +2643,7 @@ static WRITE16_HANDLER( generic_cop_w )
0x87 is used by Denjin Makai
TODO:
- Denjin Makai triggers mode 4
- Denjin Makai mode 4 is totally guessworked.
- SD Gundam doesn't fade colors correctly, it should have the text layer / sprites with normal gradient and the rest dimmed in most cases,
presumably bad RAM table or bad algorythm
*/
@ -2679,13 +2679,35 @@ static WRITE16_HANDLER( generic_cop_w )
r = fade_table[r|(pal_brightness_val ^ 0x1f)];
pal_val |= ((r + rt) & 0x1f);
}
else if(pal_brightness_mode == 4) //Denjin Makai, TODO
else if(pal_brightness_mode == 4) //Denjin Makai
{
pal_val = space->read_word(src + (cop_dma_fade_table * 0x400));
bt =(space->read_word(src + (cop_dma_fade_table * 0x400)) & 0x7c00) >> 10;
b = (space->read_word(src) & 0x7c00) >> 10;
gt =(space->read_word(src + (cop_dma_fade_table * 0x400)) & 0x03e0) >> 5;
g = (space->read_word(src) & 0x03e0) >> 5;
rt =(space->read_word(src + (cop_dma_fade_table * 0x400)) & 0x001f) >> 0;
r = (space->read_word(src) & 0x001f) >> 0;
if(pal_brightness_val == 0x10)
pal_val = bt << 10 | gt << 5 | rt << 0;
else if(pal_brightness_val == 0xff) // TODO: might be the back plane or it still doesn't do any mod, needs PCB tests
pal_val = 0;
else
{
bt = fade_table[bt<<5|((pal_brightness_val*2) ^ 0)];
b = fade_table[b<<5|((pal_brightness_val*2) ^ 0x1f)];
pal_val = ((b + bt) & 0x1f) << 10;
gt = fade_table[gt<<5|((pal_brightness_val*2) ^ 0)];
g = fade_table[g<<5|((pal_brightness_val*2) ^ 0x1f)];
pal_val |= ((g + gt) & 0x1f) << 5;
rt = fade_table[rt<<5|((pal_brightness_val*2) ^ 0)];
r = fade_table[r<<5|((pal_brightness_val*2) ^ 0x1f)];
pal_val |= ((r + rt) & 0x1f);
}
}
else
{
printf("Warning: palette DMA used with mode %02x!",pal_brightness_mode);
printf("Warning: palette DMA used with mode %02x!\n",pal_brightness_mode);
pal_val = space->read_word(src);
}