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cntsteer.cpp: improve colors (nw)

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This commit is contained in:
Angelo Salese 2019-05-24 22:39:55 +02:00
parent 8da1c6c91f
commit 9af3931f19
1 changed files with 16 additions and 26 deletions
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42
src/mame/drivers/cntsteer.cpp
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@ -138,23 +138,10 @@ void cntsteer_state::cntsteer_palette(palette_device &palette) const
const uint8_t *color_prom = memregion("proms")->base();
for (int i = 0; i < palette.entries(); i++)
{
int bit0, bit1, bit2;
// red component
bit0 = ((color_prom[i + 0x000] >> 0) & 0x01);
bit1 = ((color_prom[i + 0x100] >> 0) & 0x01);
bit2 = ((color_prom[i + 0x200] >> 0) & 0x01);
int const g = (0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2);
// green component
bit0 = ((color_prom[i + 0x000] >> 1) & 0x01);
bit1 = ((color_prom[i + 0x100] >> 1) & 0x01);
bit2 = ((color_prom[i + 0x200] >> 1) & 0x01);
int const r = (0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2);
// blue component
bit0 = ((color_prom[i + 0x000] >> 2) & 0x01);
bit1 = ((color_prom[i + 0x100] >> 2) & 0x01);
bit2 = ((color_prom[i + 0x200] >> 2) & 0x01);
int const b = (0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2);
// same as Chanbara
int const r = pal4bit((color_prom[i + 0x000] & 7) << 1);
int const g = pal4bit((color_prom[i + 0x100] & 7) << 1);
int const b = pal4bit((color_prom[i + 0x200] & 7) << 1);
palette.set_pen_color(i, rgb_t(r, g, b));
}
@ -251,7 +238,7 @@ void cntsteer_state::zerotrgt_draw_sprites( bitmap_ind16 &bitmap, const rectangl
code = m_spriteram[offs + 3] + ((m_spriteram[offs + 1] & 0xc0) << 2);
sx = (m_spriteram[offs + 2]);
sy = 0xf0 - m_spriteram[offs];
color = 0x10 + ((m_spriteram[offs + 1] & 0x20) >> 4) + ((m_spriteram[offs + 1] & 0x8)>>3);
color = 0x00 + ((m_spriteram[offs + 1] & 0x20) >> 4) + ((m_spriteram[offs + 1] & 0x8)>>3);
fx = !(m_spriteram[offs + 1] & 0x04);
fy = (m_spriteram[offs + 1] & 0x02);
@ -308,7 +295,7 @@ void cntsteer_state::cntsteer_draw_sprites( bitmap_ind16 &bitmap, const rectangl
code = m_spriteram[offs + 1] + ((m_spriteram[offs + 0x80] & 0x03) << 8);
sx = 0x100 - m_spriteram[offs + 3];
sy = 0x100 - m_spriteram[offs + 2];
color = 0x10 + ((m_spriteram[offs + 0x80] & 0x70) >> 4);
color = 0x00 + ((m_spriteram[offs + 0x80] & 0x70) >> 4);
fx = (m_spriteram[offs + 0] & 0x04);
fy = (m_spriteram[offs + 0] & 0x02);
@ -486,11 +473,12 @@ WRITE8_MEMBER(cntsteer_state::cntsteer_vregs_w)
{
case 0: m_scrolly = data; break;
case 1: m_scrollx = data; break;
case 2: m_bg_bank = (data & 0x01) << 8;
m_bg_color_bank = (data & 6) >> 1;
// TODO: of course this just inibits bus request for master.
// TODO: after further investigation, this isn't right, it disables once that player insert a coin.
case 2: m_bg_bank = (data & 0x01) << 9;
// TODO: this may be shuffled
// 4 -> title screen (correct?)
// 0 -> gameplay (supposedly a 2 is better)
// needs to know what it tries to write after stage 1 ...
m_bg_color_bank = (data & 7);
m_bg_tilemap->mark_all_dirty();
break;
case 3: m_rotation_sign = (data & 7);
@ -527,6 +515,8 @@ READ8_MEMBER(cntsteer_state::cntsteer_background_mirror_r)
return m_videoram2[bitswap<16>(offset,15,14,13,12,5,4,3,2,1,0,11,10,9,8,7,6)];
}
// TODO: on write prolly selects bit 8 of tile bank (which needs better decoding too)
/*************************************
*
* CPU comms
@ -1084,9 +1074,9 @@ ROM_START( cntsteer )
/* All 82s129 or equivalent */
ROM_REGION( 0x300, "proms", ROMREGION_ERASE00 )
ROM_LOAD( "by21.j4", 0x0000, 0x100, CRC(10e2cab4) SHA1(c266cb26b9aa3df9385605bd75a37a66ab946051) )
ROM_LOAD( "by21.j4", 0x0200, 0x100, CRC(10e2cab4) SHA1(c266cb26b9aa3df9385605bd75a37a66ab946051) )
ROM_LOAD( "by22.j5", 0x0100, 0x100, CRC(8676ad80) SHA1(891c85a88fda27e7a984eec1011ef931605a443f) )
ROM_LOAD( "by23.j6", 0x0200, 0x100, CRC(08dfd511) SHA1(45d107533864bd21d0c4bad9f16cf75bc5e5e6a2) )
ROM_LOAD( "by23.j6", 0x0000, 0x100, CRC(08dfd511) SHA1(45d107533864bd21d0c4bad9f16cf75bc5e5e6a2) )
ROM_END
ROM_START( zerotrgt )