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unkitpkr: Added proper palette resnet. Confirmed the bipolar

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PROM dump: it matches the Wall Crash one.[Roberto Fresca]
This commit is contained in:
RobertoFresca 2017-08-29 22:47:10 -03:00
parent 0bb4de537b
commit a7472823ce
1 changed files with 42 additions and 0 deletions
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42
src/mame/drivers/wallc.cpp
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@ -77,6 +77,7 @@ public:
uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
DECLARE_PALETTE_INIT(wallc);
DECLARE_PALETTE_INIT(unkitpkr);
DECLARE_VIDEO_START(unkitpkr);
DECLARE_DRIVER_INIT(wallc);
DECLARE_DRIVER_INIT(wallca);
@ -159,6 +160,45 @@ PALETTE_INIT_MEMBER(wallc_state, wallc)
}
}
PALETTE_INIT_MEMBER(wallc_state, unkitpkr)
{
// this pcb has 470 ohms resistors instead of the expected 330 ohms.
const uint8_t *color_prom = memregion("proms")->base();
int i;
static const int resistances_rg[2] = { 470, 220 };
static const int resistances_b[3] = { 655, 470, 220 };
double weights_r[2], weights_g[2], weights_b[3];
compute_resistor_weights(0, 255, -1.0,
2, resistances_rg, weights_r, 470, 0,
2, resistances_rg, weights_g, 470, 0,
3, resistances_b, weights_b, 470, 655+220);
for (i = 0;i < palette.entries();i++)
{
int bit0,bit1,bit7,r,g,b;
/* red component */
bit0 = (color_prom[i] >> 5) & 0x01;
bit1 = (color_prom[i] >> 6) & 0x01;
r = combine_2_weights(weights_r, bit1, bit0);
/* green component */
bit0 = (color_prom[i] >> 2) & 0x01;
bit1 = (color_prom[i] >> 3) & 0x01;
g = combine_2_weights(weights_g, bit1, bit0);
/* blue component */
bit0 = (color_prom[i] >> 0) & 0x01;
bit1 = (color_prom[i] >> 1) & 0x01;
bit7 = (color_prom[i] >> 7) & 0x01;
b = combine_3_weights(weights_b, bit7, bit1, bit0);
palette.set_pen_color(i,rgb_t(r,g,b));
}
}
WRITE8_MEMBER(wallc_state::videoram_w)
{
m_videoram[offset] = data;
@ -460,6 +500,8 @@ static MACHINE_CONFIG_DERIVED( unkitpkr, wallc )
MCFG_CPU_PROGRAM_MAP(unkitpkr_map)
MCFG_VIDEO_START_OVERRIDE(wallc_state, unkitpkr)
MCFG_PALETTE_MODIFY("palette")
MCFG_PALETTE_INIT_OWNER(wallc_state, unkitpkr)
/* sound hardware */
MCFG_SOUND_MODIFY("aysnd")