diff options
Diffstat (limited to 'src/mame/gaelco/xorworld_v.cpp')
-rw-r--r-- | src/mame/gaelco/xorworld_v.cpp | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/src/mame/gaelco/xorworld_v.cpp b/src/mame/gaelco/xorworld_v.cpp deleted file mode 100644 index 5cd8fed5647..00000000000 --- a/src/mame/gaelco/xorworld_v.cpp +++ /dev/null @@ -1,115 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Manuel Abadia -#include "emu.h" -#include "xorworld.h" - - -/*************************************************************************** - - Convert the color PROMs into a more useable format. - - Xor World has three 256x4 palette PROMs (one per gun). - The palette PROMs are connected to the RGB output this way: - - bit 3 -- 220 ohm resistor -- RED/GREEN/BLUE - -- 460 ohm resistor -- RED/GREEN/BLUE - -- 1 kohm resistor -- RED/GREEN/BLUE - bit 0 -- 2.2kohm resistor -- RED/GREEN/BLUE - -***************************************************************************/ - -void xorworld_state::xorworld_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, bit3; - - // red component - bit0 = BIT(color_prom[0], 0); - bit1 = BIT(color_prom[0], 1); - bit2 = BIT(color_prom[0], 2); - bit3 = BIT(color_prom[0], 3); - int const r = 0x0e*bit0 + 0x1e*bit1 + 0x44*bit2 + 0x8f*bit3; - // green component - bit0 = BIT(color_prom[palette.entries()], 0); - bit1 = BIT(color_prom[palette.entries()], 1); - bit2 = BIT(color_prom[palette.entries()], 2); - bit3 = BIT(color_prom[palette.entries()], 3); - int const g = 0x0e*bit0 + 0x1e*bit1 + 0x44*bit2 + 0x8f*bit3; - // blue component - bit0 = BIT(color_prom[2 * palette.entries()], 0); - bit1 = BIT(color_prom[2 * palette.entries()], 1); - bit2 = BIT(color_prom[2 * palette.entries()], 2); - bit3 = BIT(color_prom[2 * palette.entries()], 3); - int const b = 0x0e*bit0 + 0x1e * bit1 + 0x44*bit2 + 0x8f*bit3; - palette.set_pen_color(i, rgb_t(r, g, b)); - - color_prom++; - } -} - -void xorworld_state::videoram_w(offs_t offset, uint16_t data, uint16_t mem_mask) -{ - COMBINE_DATA(&m_videoram[offset]); - m_bg_tilemap->mark_tile_dirty(offset); -} - -/* - Tile format - ----------- - - Word | Bit(s) | Description - -----+-FEDCBA98-76543210-+-------------------------- - 0 | ----xxxx xxxxxxxx | code - 0 | xxxx---- -------- | color -*/ - -TILE_GET_INFO_MEMBER(xorworld_state::get_bg_tile_info) -{ - int data = m_videoram[tile_index]; - int code = data & 0x0fff; - - tileinfo.set(0, code, data >> 12, 0); -} - -void xorworld_state::video_start() -{ - m_bg_tilemap = &machine().tilemap().create( - *m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(xorworld_state::get_bg_tile_info)), TILEMAP_SCAN_ROWS, - 8, 8, 32, 32); -} - -/* - Sprite Format - ------------- - - Word | Bit(s) | Description - -----+-FEDCBA98-76543210-+-------------------------- - 0 | -------- xxxxxxxx | x position - 0 | xxxxxxxx -------- | y position - 1 | -------- ------xx | flipxy? (not used) - 1 | ----xxxx xxxxxx-- | sprite number - 1 | xxxx---- -------- | sprite color -*/ - -void xorworld_state::draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect ) -{ - for (int i = 0; i < 0x40; i += 2) - { - int sx = m_spriteram[i] & 0x00ff; - int sy = 240 - (((m_spriteram[i] & 0xff00) >> 8) & 0xff); - int code = (m_spriteram[i+1] & 0x0ffc) >> 2; - int color = (m_spriteram[i+1] & 0xf000) >> 12; - - m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, code, color, 0, 0, sx, sy, 0); - } -} - -uint32_t xorworld_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) -{ - m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); - draw_sprites(bitmap, cliprect); - return 0; -} |