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Diffstat (limited to 'src/mame/video/ironhors.cpp')
-rw-r--r-- | src/mame/video/ironhors.cpp | 349 |
1 files changed, 0 insertions, 349 deletions
diff --git a/src/mame/video/ironhors.cpp b/src/mame/video/ironhors.cpp deleted file mode 100644 index fe8867df9d8..00000000000 --- a/src/mame/video/ironhors.cpp +++ /dev/null @@ -1,349 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Mirko Buffoni -/*************************************************************************** - - ironhors.c - - Functions to emulate the video hardware of the machine. - -***************************************************************************/ - -#include "emu.h" -#include "video/resnet.h" -#include "includes/ironhors.h" - -/*************************************************************************** - - Convert the color PROMs into a more useable format. - -***************************************************************************/ - -void ironhors_state::ironhors_palette(palette_device &palette) const -{ - const uint8_t *color_prom = memregion("proms")->base(); - static constexpr int resistances[4] = { 2000, 1000, 470, 220 }; - - // compute the color output resistor weights - double rweights[4], gweights[4], bweights[4]; - compute_resistor_weights(0, 255, -1.0, - 4, resistances, rweights, 1000, 0, - 4, resistances, gweights, 1000, 0, - 4, resistances, bweights, 1000, 0); - - // create a lookup table for the palette - for (int i = 0; i < 0x100; i++) - { - int bit0, bit1, bit2, bit3; - - // red component - bit0 = BIT(color_prom[i | 0x000], 0); - bit1 = BIT(color_prom[i | 0x000], 1); - bit2 = BIT(color_prom[i | 0x000], 2); - bit3 = BIT(color_prom[i | 0x000], 3); - int const r = combine_weights(rweights, bit0, bit1, bit2, bit3); - - // green component - bit0 = BIT(color_prom[i | 0x100], 0); - bit1 = BIT(color_prom[i | 0x100], 1); - bit2 = BIT(color_prom[i | 0x100], 2); - bit3 = BIT(color_prom[i | 0x100], 3); - int const g = combine_weights(gweights, bit0, bit1, bit2, bit3); - - // blue component - bit0 = BIT(color_prom[i | 0x200], 0); - bit1 = BIT(color_prom[i | 0x200], 1); - bit2 = BIT(color_prom[i | 0x200], 2); - bit3 = BIT(color_prom[i | 0x200], 3); - int const b = combine_weights(bweights, bit0, bit1, bit2, bit3); - - palette.set_indirect_color(i, rgb_t(r, g, b)); - } - - // color_prom now points to the beginning of the lookup table - color_prom += 0x300; - - // characters use colors 0x10-0x1f of each 0x20 color bank, while sprites use colors 0-0x0f - for (int i = 0; i < 0x200; i++) - { - for (int j = 0; j < 8; j++) - { - uint8_t const ctabentry = (j << 5) | ((~i & 0x100) >> 4) | (color_prom[i] & 0x0f); - palette.set_pen_indirect(((i & 0x100) << 3) | (j << 8) | (i & 0xff), ctabentry); - } - } -} - -void ironhors_state::videoram_w(offs_t offset, uint8_t data) -{ - m_videoram[offset] = data; - m_bg_tilemap->mark_tile_dirty(offset); -} - -void ironhors_state::colorram_w(offs_t offset, uint8_t data) -{ - m_colorram[offset] = data; - m_bg_tilemap->mark_tile_dirty(offset); -} - -void ironhors_state::charbank_w(uint8_t data) -{ - if (m_charbank != (data & 0x03)) - { - m_charbank = data & 0x03; - machine().tilemap().mark_all_dirty(); - } - - m_spriterambank = data & 0x08; - - /* other bits unknown */ -} - -void ironhors_state::palettebank_w(uint8_t data) -{ - if (m_palettebank != (data & 0x07)) - { - m_palettebank = data & 0x07; - machine().tilemap().mark_all_dirty(); - } - - machine().bookkeeping().coin_counter_w(0, data & 0x10); - machine().bookkeeping().coin_counter_w(1, data & 0x20); - - /* bit 6 unknown - set after game over */ - - if (data & 0x88) - popmessage("palettebank_w %02x",data); -} - -void ironhors_state::flipscreen_w(uint8_t data) -{ - if (flip_screen() != (~data & 0x08)) - { - flip_screen_set(~data & 0x08); - machine().tilemap().mark_all_dirty(); - } - - /* other bits are used too, but unknown */ -} - -TILE_GET_INFO_MEMBER(ironhors_state::get_bg_tile_info) -{ - int code = m_videoram[tile_index] + ((m_colorram[tile_index] & 0x40) << 2) + - ((m_colorram[tile_index] & 0x20) << 4) + (m_charbank << 10); - int color = (m_colorram[tile_index] & 0x0f) + 16 * m_palettebank; - int flags = ((m_colorram[tile_index] & 0x10) ? TILE_FLIPX : 0) | - ((m_colorram[tile_index] & 0x20) ? TILE_FLIPY : 0); - - tileinfo.set(0, code, color, flags); -} - -void ironhors_state::video_start() -{ - m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(ironhors_state::get_bg_tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 32, 32); - - m_bg_tilemap->set_scroll_rows(32); -} - -void ironhors_state::draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect ) -{ - int offs; - uint8_t *sr; - - if (m_spriterambank != 0) - sr = m_spriteram; - else - sr = m_spriteram2; - - for (offs = 0; offs < m_spriteram.bytes(); offs += 5) - { - int sx = sr[offs + 3]; - int sy = sr[offs + 2]; - int flipx = sr[offs + 4] & 0x20; - int flipy = sr[offs + 4] & 0x40; - int code = (sr[offs] << 2) + ((sr[offs + 1] & 0x03) << 10) + ((sr[offs + 1] & 0x0c) >> 2); - int color = ((sr[offs + 1] & 0xf0) >> 4) + 16 * m_palettebank; - // int mod = flip_screen() ? -8 : 8; - - if (flip_screen()) - { - sx = 240 - sx; - sy = 240 - sy; - flipx = !flipx; - flipy = !flipy; - } - - switch (sr[offs + 4] & 0x0c) - { - case 0x00: /* 16x16 */ - m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, - code/4, - color, - flipx,flipy, - sx,sy,0); - break; - - case 0x04: /* 16x8 */ - { - if (flip_screen()) sy += 8; // this fixes the train wheels' position - - m_gfxdecode->gfx(2)->transpen(bitmap,cliprect, - code & ~1, - color, - flipx,flipy, - flipx?sx+8:sx,sy,0); - m_gfxdecode->gfx(2)->transpen(bitmap,cliprect, - code | 1, - color, - flipx,flipy, - flipx?sx:sx+8,sy,0); - } - break; - - case 0x08: /* 8x16 */ - { - m_gfxdecode->gfx(2)->transpen(bitmap,cliprect, - code & ~2, - color, - flipx,flipy, - sx,flipy?sy+8:sy,0); - m_gfxdecode->gfx(2)->transpen(bitmap,cliprect, - code | 2, - color, - flipx,flipy, - sx,flipy?sy:sy+8,0); - } - break; - - case 0x0c: /* 8x8 */ - { - m_gfxdecode->gfx(2)->transpen(bitmap,cliprect, - code, - color, - flipx,flipy, - sx,sy,0); - } - break; - } - } -} - -uint32_t ironhors_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) -{ - int row; - - for (row = 0; row < 32; row++) - m_bg_tilemap->set_scrollx(row, m_scroll[row]); - - m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); - draw_sprites(bitmap, cliprect); - return 0; -} - -TILE_GET_INFO_MEMBER(ironhors_state::farwest_get_bg_tile_info) -{ - int code = m_videoram[tile_index] + ((m_colorram[tile_index] & 0x40) << 2) + - ((m_colorram[tile_index] & 0x20) << 4) + (m_charbank << 10); - int color = (m_colorram[tile_index] & 0x0f) + 16 * m_palettebank; - int flags = 0;//((m_colorram[tile_index] & 0x10) ? TILE_FLIPX : 0) | ((m_colorram[tile_index] & 0x20) ? TILE_FLIPY : 0); - - tileinfo.set(0, code, color, flags); -} - -VIDEO_START_MEMBER(ironhors_state,farwest) -{ - m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(ironhors_state::farwest_get_bg_tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 32, 32); - - m_bg_tilemap->set_scroll_rows(32); -} - -void ironhors_state::farwest_draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect ) -{ - int offs; - uint8_t *sr = m_spriteram2; - uint8_t *sr2 = m_spriteram; - - for (offs = 0; offs < m_spriteram.bytes(); offs += 4) - { - int sx = sr[offs + 2]; - int sy = sr[offs + 1]; - int flipx = sr[offs + 3] & 0x20; - int flipy = sr[offs + 3] & 0x40; - int code = (sr[offs] << 2) + ((sr2[offs] & 0x03) << 10) + ((sr2[offs] & 0x0c) >> 2); - int color = ((sr2[offs] & 0xf0) >> 4) + 16 * m_palettebank; - - // int mod = flip_screen() ? -8 : 8; - -// if (flip_screen()) - { - // sx = 240 - sx; - sy = 240 - sy; - // flipx = !flipx; - // flipy = !flipy; - } - - switch (sr[offs + 3] & 0x0c) - { - case 0x00: /* 16x16 */ - m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, - code/4, - color, - flipx,flipy, - sx,sy,0); - break; - - case 0x04: /* 16x8 */ - { - if (flip_screen()) sy += 8; // this fixes the train wheels' position - - m_gfxdecode->gfx(2)->transpen(bitmap,cliprect, - code & ~1, - color, - flipx,flipy, - flipx?sx+8:sx,sy,0); - m_gfxdecode->gfx(2)->transpen(bitmap,cliprect, - code | 1, - color, - flipx,flipy, - flipx?sx:sx+8,sy,0); - } - break; - - case 0x08: /* 8x16 */ - { - m_gfxdecode->gfx(2)->transpen(bitmap,cliprect, - code & ~2, - color, - flipx,flipy, - sx,flipy?sy+8:sy,0); - m_gfxdecode->gfx(2)->transpen(bitmap,cliprect, - code | 2, - color, - flipx,flipy, - sx,flipy?sy:sy+8,0); - } - break; - - case 0x0c: /* 8x8 */ - { - m_gfxdecode->gfx(2)->transpen(bitmap,cliprect, - code, - color, - flipx,flipy, - sx,sy,0); - } - break; - } - } -} - -uint32_t ironhors_state::screen_update_farwest(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) -{ - int row; - - for (row = 0; row < 32; row++) - m_bg_tilemap->set_scrollx(row, m_scroll[row]); - - m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); - farwest_draw_sprites(bitmap, cliprect); - return 0; -} |