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Diffstat (limited to 'src/mame/video/seicross.cpp')
-rw-r--r-- | src/mame/video/seicross.cpp | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/src/mame/video/seicross.cpp b/src/mame/video/seicross.cpp deleted file mode 100644 index 5d8556f3a10..00000000000 --- a/src/mame/video/seicross.cpp +++ /dev/null @@ -1,143 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Nicola Salmoria -/*************************************************************************** - - video.c - - Functions to emulate the video hardware of the machine. - -***************************************************************************/ - -#include "emu.h" -#include "includes/seicross.h" - -/*************************************************************************** - - Convert the color PROMs into a more useable format. - - Seicross has two 32x8 palette PROMs, connected to the RGB output this way: - - bit 7 -- 220 ohm resistor -- BLUE - -- 470 ohm resistor -- BLUE - -- 220 ohm resistor -- GREEN - -- 470 ohm resistor -- GREEN - -- 1 kohm resistor -- GREEN - -- 220 ohm resistor -- RED - -- 470 ohm resistor -- RED - bit 0 -- 1 kohm resistor -- RED - -***************************************************************************/ -void seicross_state::seicross_palette(palette_device &palette) const -{ - uint8_t const *const color_prom = memregion("proms")->base(); - - 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 = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; - // green component - bit0 = BIT(color_prom[i], 3); - bit1 = BIT(color_prom[i], 4); - bit2 = BIT(color_prom[i], 5); - int const g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; - // blue component - bit0 = BIT(color_prom[i], 6); - bit1 = BIT(color_prom[i], 7); - int const b = 0x4f * bit0 + 0xa8 * bit1; - - palette.set_pen_color(i, rgb_t(r, g, b)); - } -} - -WRITE8_MEMBER(seicross_state::videoram_w) -{ - m_videoram[offset] = data; - m_bg_tilemap->mark_tile_dirty(offset); -} - -WRITE8_MEMBER(seicross_state::colorram_w) -{ - /* bit 5 of the address is not used for color memory. There is just */ - /* 512k of memory; every two consecutive rows share the same memory */ - /* region. */ - - offset &= 0xffdf; - - m_colorram[offset] = data; - m_colorram[offset + 0x20] = data; - - m_bg_tilemap->mark_tile_dirty(offset); - m_bg_tilemap->mark_tile_dirty(offset + 0x20); -} - -TILE_GET_INFO_MEMBER(seicross_state::get_bg_tile_info) -{ - int code = m_videoram[tile_index] + ((m_colorram[tile_index] & 0x10) << 4); - int color = m_colorram[tile_index] & 0x0f; - int flags = ((m_colorram[tile_index] & 0x40) ? TILE_FLIPX : 0) | ((m_colorram[tile_index] & 0x80) ? TILE_FLIPY : 0); - - SET_TILE_INFO_MEMBER(0, code, color, flags); -} - -void seicross_state::video_start() -{ - m_bg_tilemap = &machine().tilemap().create( - *m_gfxdecode, tilemap_get_info_delegate(FUNC(seicross_state::get_bg_tile_info),this), TILEMAP_SCAN_ROWS, - 8, 8, 32, 32); - - m_bg_tilemap->set_scroll_cols(32); -} - -void seicross_state::draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect ) -{ - int offs; - - for (offs = m_spriteram.bytes() - 4; offs >= 0; offs -= 4) - { - int x = m_spriteram[offs + 3]; - m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, - (m_spriteram[offs] & 0x3f) + ((m_spriteram[offs + 1] & 0x10) << 2) + 128, - m_spriteram[offs + 1] & 0x0f, - m_spriteram[offs] & 0x40,m_spriteram[offs] & 0x80, - x,240-m_spriteram[offs + 2],0); - if(x>0xf0) - m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, - (m_spriteram[offs] & 0x3f) + ((m_spriteram[offs + 1] & 0x10) << 2) + 128, - m_spriteram[offs + 1] & 0x0f, - m_spriteram[offs] & 0x40,m_spriteram[offs] & 0x80, - x-256,240-m_spriteram[offs + 2],0); - } - - for (offs = m_spriteram2.bytes() - 4; offs >= 0; offs -= 4) - { - int x = m_spriteram2[offs + 3]; - m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, - (m_spriteram2[offs] & 0x3f) + ((m_spriteram2[offs + 1] & 0x10) << 2), - m_spriteram2[offs + 1] & 0x0f, - m_spriteram2[offs] & 0x40,m_spriteram2[offs] & 0x80, - x,240-m_spriteram2[offs + 2],0); - if(x>0xf0) - m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, - (m_spriteram2[offs] & 0x3f) + ((m_spriteram2[offs + 1] & 0x10) << 2), - m_spriteram2[offs + 1] & 0x0f, - m_spriteram2[offs] & 0x40,m_spriteram2[offs] & 0x80, - x-256,240-m_spriteram2[offs + 2],0); - } -} - -uint32_t seicross_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) -{ - int col; - - for (col = 0; col < 32; col++) - m_bg_tilemap->set_scrolly(col, m_row_scroll[col]); - - m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); - draw_sprites(bitmap, cliprect); - return 0; -} |