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// license:BSD-3-Clause
// copyright-holders:Roberto Fresca
/**********************************************************************************
SNOOKER 10 / SANDII'
Video Hardware.
Written by Roberto Fresca.
***********************************************************************************
Resistor Network for all PCBs:
74LS373
.-------.
| 02|--> 1 KOhms resistor --> \
| 05|--> 470 Ohms resistor --> > 100 Ohms pull-down resistor --> RED
| 06|--> 220 Ohms resistor --> /
| |
| 09|--> 1 KOhms resistor --> \
| 12|--> 470 Ohms resistor --> > 100 Ohms pull-down resistor --> BLUE
| 15|--> 220 Ohms resistor --> /
| |
| 16|--> 470 Ohms resistor --> \ 100 Ohms pull-down resistor --> GREEN
| 19|--> 220 Ohms resistor --> /
'-------'
**********************************************************************************/
#include "emu.h"
#include "video/resnet.h"
#include "includes/snookr10.h"
void snookr10_state::snookr10_videoram_w(offs_t offset, uint8_t data)
{
m_videoram[offset] = data;
m_bg_tilemap->mark_tile_dirty(offset);
}
void snookr10_state::snookr10_colorram_w(offs_t offset, uint8_t data)
{
m_colorram[offset] = data;
m_bg_tilemap->mark_tile_dirty(offset);
}
void snookr10_state::snookr10_palette(palette_device &palette) const
{
uint8_t const *const color_prom = memregion("proms")->base();
/* GGBBBRRR */
static constexpr int resistances_rb[3] = { 1000, 470, 220 };
static constexpr int resistances_g [2] = { 470, 220 };
double weights_r[3], weights_b[3], weights_g[2];
compute_resistor_weights(0, 255, -1.0,
3, resistances_rb, weights_r, 100, 0,
3, resistances_rb, weights_b, 100, 0,
2, resistances_g, weights_g, 100, 0);
for (int i = 0; i < palette.entries(); i++)
{
int bit0, bit1, bit2;
// red component
bit0 = BIT(color_prom[i], 0);
bit1 = BIT(color_prom[i], 1);
bit2 = BIT(color_prom[i], 2);
int const r = combine_weights(weights_r, bit0, bit1, bit2);
// blue component
bit0 = BIT(color_prom[i], 3);
bit1 = BIT(color_prom[i], 4);
bit2 = BIT(color_prom[i], 5);
int const b = combine_weights(weights_b, bit0, bit1, bit2);
// green component
bit0 = BIT(color_prom[i], 6);
bit1 = BIT(color_prom[i], 7);
int const g = combine_weights(weights_g, bit0, bit1);
palette.set_pen_color(i, rgb_t(r, g, b));
}
}
TILE_GET_INFO_MEMBER(snookr10_state::get_bg_tile_info)
{
/* - bits -
7654 3210
xxxx ---- tiles color.
---- xxxx seems unused.
*/
int offs = tile_index;
int attr = m_videoram[offs] + (m_colorram[offs] << 8);
int code = attr & 0xfff;
int color = m_colorram[offs] >> 4;
tileinfo.set(0, code, color, 0);
}
/**********************************************************
Apple 10 palette and tile matrix / video RAM
are encrypted/scrambled.
For more information, see the driver notes.
**********************************************************/
void snookr10_state::apple10_palette(palette_device &palette) const
{
uint8_t const *const color_prom = memregion("proms")->base();
/* GGBBBRRR */
static constexpr int resistances_rb[3] = { 1000, 470, 220 };
static constexpr int resistances_g [2] = { 470, 220 };
double weights_r[3], weights_b[3], weights_g[2];
compute_resistor_weights(0, 255, -1.0,
3, resistances_rb, weights_r, 100, 0,
3, resistances_rb, weights_b, 100, 0,
2, resistances_g, weights_g, 100, 0);
for (int i = 0; i < palette.entries(); i++)
{
int bit0, bit1, bit2;
/* red component */
bit0 = BIT(color_prom[i], 0);
bit1 = BIT(color_prom[i], 1);
bit2 = BIT(color_prom[i], 2);
int const r = combine_weights(weights_r, bit0, bit1, bit2);
/* blue component */
bit0 = BIT(color_prom[i], 3);
bit1 = BIT(color_prom[i], 4);
bit2 = BIT(color_prom[i], 5);
int const b = combine_weights(weights_b, bit0, bit1, bit2);
/* green component */
bit0 = BIT(color_prom[i], 6);
bit1 = BIT(color_prom[i], 7);
int const g = combine_weights(weights_g, bit0, bit1);
/* encrypted color matrix */
int const cn = bitswap<8>(i, 4, 5, 6, 7, 2, 3, 0, 1);
palette.set_pen_color(cn, rgb_t(r, g, b));
}
}
TILE_GET_INFO_MEMBER(snookr10_state::apple10_get_bg_tile_info)
{
/* - bits -
7654 3210
xxxx ---- tiles color.
---- xxxx seems unused.
*/
int offs = tile_index;
int attr = m_videoram[offs] + (m_colorram[offs] << 8);
int code = bitswap<16>((attr & 0xfff),15,14,13,12,8,9,10,11,0,1,2,3,4,5,6,7); /* encrypted tile matrix */
int color = m_colorram[offs] >> 4;
tileinfo.set(0, code, color, 0);
}
/**********************************************************
Crystals Colours palette and tile matrix / video RAM
are encrypted/scrambled.
For more information, see the driver notes.
**********************************************************/
void snookr10_state::crystalc_palette(palette_device &palette) const
{
uint8_t const *const color_prom = memregion("proms")->base();
/* GGBBBRRR */
static constexpr int resistances_rb[3] = { 1000, 470, 220 };
static constexpr int resistances_g [2] = { 470, 220 };
double weights_r[3], weights_b[3], weights_g[2];
compute_resistor_weights(0, 255, -1.0,
3, resistances_rb, weights_r, 100, 0,
3, resistances_rb, weights_b, 100, 0,
2, resistances_g, weights_g, 100, 0);
for (int i = 0; i < palette.entries(); i++)
{
int bit0, bit1, bit2;
// red component
bit0 = BIT(color_prom[i], 0);
bit1 = BIT(color_prom[i], 1);
bit2 = BIT(color_prom[i], 2);
int const r = combine_weights(weights_r, bit0, bit1, bit2);
// blue component
bit0 = BIT(color_prom[i], 3);
bit1 = BIT(color_prom[i], 4);
bit2 = BIT(color_prom[i], 5);
int const b = combine_weights(weights_b, bit0, bit1, bit2);
// green component
bit0 = BIT(color_prom[i], 6);
bit1 = BIT(color_prom[i], 7);
int const g = combine_weights(weights_g, bit0, bit1);
// encrypted color matrix
int const cn = bitswap<8>(i, 7, 5, 6, 4, 3, 2, 1, 0);
palette.set_pen_color(cn, rgb_t(r, g, b));
}
}
TILE_GET_INFO_MEMBER(snookr10_state::crystalc_get_bg_tile_info)
{
/* - bits -
7654 3210
xxxx ---- tiles color.
---- xxxx seems unused.
*/
int offs = tile_index;
int attr = m_videoram[offs] + (m_colorram[offs] << 8);
int code = bitswap<16>((attr & 0xfff),15,14,13,12,0,10,5,1,7,6,9,4,3,2,8,11); /* encrypted tile matrix */
int color = m_colorram[offs] >> 4;
tileinfo.set(0, code, color, 0);
}
void snookr10_state::video_start()
{
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(snookr10_state::get_bg_tile_info)), TILEMAP_SCAN_ROWS, 4, 8, 128, 30);
}
VIDEO_START_MEMBER(snookr10_state, apple10)
{
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(snookr10_state::apple10_get_bg_tile_info)), TILEMAP_SCAN_ROWS, 4, 8, 128, 30);
}
VIDEO_START_MEMBER(snookr10_state, crystalc)
{
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(snookr10_state::crystalc_get_bg_tile_info)), TILEMAP_SCAN_ROWS, 4, 8, 128, 30);
}
uint32_t snookr10_state::screen_update_snookr10(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
return 0;
}
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