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Diffstat (limited to 'src/mame/video/sonson.cpp')
-rw-r--r-- | src/mame/video/sonson.cpp | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/src/mame/video/sonson.cpp b/src/mame/video/sonson.cpp deleted file mode 100644 index f77f557e669..00000000000 --- a/src/mame/video/sonson.cpp +++ /dev/null @@ -1,174 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Mirko Buffoni -/*************************************************************************** - - video.c - - Functions to emulate the video hardware of the machine. - -***************************************************************************/ - -#include "emu.h" -#include "includes/sonson.h" - -/*************************************************************************** - - Convert the color PROMs into a more useable format. - - Son Son has two 32x8 palette PROMs and two 256x4 lookup table PROMs (one - for characters, one for sprites). - The palette PROMs are connected to the RGB output this way: - - I don't know the exact values of the resistors between the PROMs and the - RGB output. I assumed these values (the same as Commando) - bit 7 -- 220 ohm resistor -- GREEN - -- 470 ohm resistor -- GREEN - -- 1 kohm resistor -- GREEN - -- 2.2kohm resistor -- GREEN - -- 220 ohm resistor -- BLUE - -- 470 ohm resistor -- BLUE - -- 1 kohm resistor -- BLUE - bit 0 -- 2.2kohm resistor -- BLUE - - bit 7 -- unused - -- unused - -- unused - -- unused - -- 220 ohm resistor -- RED - -- 470 ohm resistor -- RED - -- 1 kohm resistor -- RED - bit 0 -- 2.2kohm resistor -- RED - -***************************************************************************/ - -void sonson_state::sonson_palette(palette_device &palette) const -{ - const uint8_t *color_prom = memregion("proms")->base(); - - // create a lookup table for the palette - for (int i = 0; i < 0x20; i++) - { - int bit0, bit1, bit2, bit3; - - // red component - bit0 = (color_prom[i + 0x20] >> 0) & 0x01; - bit1 = (color_prom[i + 0x20] >> 1) & 0x01; - bit2 = (color_prom[i + 0x20] >> 2) & 0x01; - bit3 = (color_prom[i + 0x20] >> 3) & 0x01; - int const r = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3; - - // green component - bit0 = (color_prom[i + 0x00] >> 4) & 0x01; - bit1 = (color_prom[i + 0x00] >> 5) & 0x01; - bit2 = (color_prom[i + 0x00] >> 6) & 0x01; - bit3 = (color_prom[i + 0x00] >> 7) & 0x01; - int const g = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3; - - // blue component - bit0 = (color_prom[i + 0x00] >> 0) & 0x01; - bit1 = (color_prom[i + 0x00] >> 1) & 0x01; - bit2 = (color_prom[i + 0x00] >> 2) & 0x01; - bit3 = (color_prom[i + 0x00] >> 3) & 0x01; - int const b = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3; - - palette.set_indirect_color(i, rgb_t(r, g, b)); - } - - // color_prom now points to the beginning of the lookup table - color_prom += 0x40; - - // characters use colors 0-0x0f - for (int i = 0; i < 0x100; i++) - { - uint8_t const ctabentry = color_prom[i] & 0x0f; - palette.set_pen_indirect(i, ctabentry); - } - - // sprites use colors 0x10-0x1f - for (int i = 0x100; i < 0x200; i++) - { - uint8_t const ctabentry = (color_prom[i] & 0x0f) | 0x10; - palette.set_pen_indirect(i, ctabentry); - } -} - -WRITE8_MEMBER(sonson_state::sonson_videoram_w) -{ - m_videoram[offset] = data; - m_bg_tilemap->mark_tile_dirty(offset); -} - -WRITE8_MEMBER(sonson_state::sonson_colorram_w) -{ - m_colorram[offset] = data; - m_bg_tilemap->mark_tile_dirty(offset); -} - -WRITE8_MEMBER(sonson_state::sonson_scrollx_w) -{ - int row; - - for (row = 5; row < 32; row++) - m_bg_tilemap->set_scrollx(row, data); -} - -WRITE_LINE_MEMBER(sonson_state::flipscreen_w) -{ - flip_screen_set(!state); -} - -TILE_GET_INFO_MEMBER(sonson_state::get_bg_tile_info) -{ - int attr = m_colorram[tile_index]; - int code = m_videoram[tile_index] + 256 * (attr & 0x03); - int color = attr >> 2; - - SET_TILE_INFO_MEMBER(0, code, color, 0); -} - -void sonson_state::video_start() -{ - m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(sonson_state::get_bg_tile_info),this), TILEMAP_SCAN_ROWS, 8, 8, 32, 32); - m_bg_tilemap->set_scroll_rows(32); -} - -void sonson_state::draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect ) -{ - uint8_t *spriteram = m_spriteram; - int offs; - - for (offs = m_spriteram.bytes() - 4; offs >= 0; offs -= 4) - { - int code = spriteram[offs + 2] + ((spriteram[offs + 1] & 0x20) << 3); - int color = spriteram[offs + 1] & 0x1f; - int flipx = ~spriteram[offs + 1] & 0x40; - int flipy = ~spriteram[offs + 1] & 0x80; - int sx = spriteram[offs + 3]; - int sy = spriteram[offs + 0]; - - if (flip_screen()) - { - sx = 240 - sx; - sy = 240 - sy; - flipx = !flipx; - flipy = !flipy; - } - - - m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, - code, color, - flipx, flipy, - sx, sy, 0); - - /* wrap-around */ - m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, code, color, flipx, flipy, sx - 256, sy, 0); - m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, code, color, flipx, flipy, sx, sy - 256, 0); - } -} - -uint32_t sonson_state::screen_update_sonson(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) -{ - m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); - draw_sprites(bitmap, cliprect); - return 0; -} |