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taito_f3.cpp: Darius Gaiden sprite trail note (nw)

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Angelo Salese 2019-07-26 19:37:35 +02:00 committed by GitHub
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commit 7b624b9ba8
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src/mame/video/taito_f3.cpp
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@ -2769,6 +2769,9 @@ void taito_f3_state::get_sprite_info(const u16 *spriteram16_ptr)
/* cntrl & 0x1000 = disabled? (From F2 driver, doesn't seem used anywhere)
cntrl & 0x0010 = ???
cntrl & 0x0020 = ???
cntrl & 0x0002 = enabled when Darius Gaiden sprite trail effect should occur (MT #1922)
Notice that sprites also completely disappear due of a bug/missing feature in the
alpha routines.
*/
m_sprite_extra_planes = (cntrl & 0x0300) >> 8; // 0 = 4bpp, 1 = 5bpp, 2 = unused?, 3 = 6bpp