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Diffstat (limited to 'src/mame/video/eprom.cpp')
-rw-r--r-- | src/mame/video/eprom.cpp | 414 |
1 files changed, 0 insertions, 414 deletions
diff --git a/src/mame/video/eprom.cpp b/src/mame/video/eprom.cpp deleted file mode 100644 index 3975aef10e2..00000000000 --- a/src/mame/video/eprom.cpp +++ /dev/null @@ -1,414 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Aaron Giles -/*************************************************************************** - - Atari Escape hardware - -****************************************************************************/ - -#include "emu.h" -#include "includes/eprom.h" - - -/************************************* - * - * Palette - * - *************************************/ - -void eprom_state::update_palette() -{ - int color; - - for (color = 0; color < 0x800; ++color) - { - int i, r, g, b; - uint16_t const data = m_paletteram[color]; - - /* FIXME this is only a very crude approximation of the palette output. - * The circuit involves a dozen transistors and probably has an output - * which is quite different from this. - * This is, however, good enough to match the video and description - * of MAMETesters bug #02677. - */ - i = (((data >> 12) & 15) + 1) * (4 - m_screen_intensity); - if (i < 0) - i = 0; - - r = ((data >> 8) & 15) * i / 4; - g = ((data >> 4) & 15) * i / 4; - b = ((data >> 0) & 15) * i / 4; - - m_palette->set_pen_color(color, r, g, b); - } -} - - - -/************************************* - * - * Tilemap callbacks - * - *************************************/ - -TILE_GET_INFO_MEMBER(eprom_state::get_alpha_tile_info) -{ - uint16_t data = m_alpha_tilemap->basemem_read(tile_index); - int code = data & 0x3ff; - int color = ((data >> 10) & 0x0f) | ((data >> 9) & 0x20); - int opaque = data & 0x8000; - SET_TILE_INFO_MEMBER(1, code, color, opaque ? TILE_FORCE_LAYER0 : 0); -} - - -TILE_GET_INFO_MEMBER(eprom_state::get_playfield_tile_info) -{ - uint16_t data1 = m_playfield_tilemap->basemem_read(tile_index); - uint16_t data2 = m_playfield_tilemap->extmem_read(tile_index) >> 8; - int code = data1 & 0x7fff; - int color = 0x10 + (data2 & 0x0f); - SET_TILE_INFO_MEMBER(0, code, color, (data1 >> 15) & 1); -} - - -TILE_GET_INFO_MEMBER(eprom_state::guts_get_playfield_tile_info) -{ - uint16_t data1 = m_playfield_tilemap->basemem_read(tile_index); - uint16_t data2 = m_playfield_tilemap->extmem_read(tile_index) >> 8; - int code = data1 & 0x7fff; - int color = 0x10 + (data2 & 0x0f); - SET_TILE_INFO_MEMBER(2, code, color, (data1 >> 15) & 1); -} - - - -/************************************* - * - * Video system start - * - *************************************/ - -const atari_motion_objects_config eprom_state::s_mob_config = -{ - 0, /* index to which gfx system */ - 1, /* number of motion object banks */ - 1, /* are the entries linked? */ - 0, /* are the entries split? */ - 1, /* render in reverse order? */ - 0, /* render in swapped X/Y order? */ - 0, /* does the neighbor bit affect the next object? */ - 8, /* pixels per SLIP entry (0 for no-slip) */ - 0, /* pixel offset for SLIPs */ - 0, /* maximum number of links to visit/scanline (0=all) */ - - 0x100, /* base palette entry */ - 0x100, /* maximum number of colors */ - 0, /* transparent pen index */ - - {{ 0x03ff,0,0,0 }}, /* mask for the link */ - {{ 0,0x7fff,0,0 }}, /* mask for the code index */ - {{ 0,0,0x000f,0 }}, /* mask for the color */ - {{ 0,0,0xff80,0 }}, /* mask for the X position */ - {{ 0,0,0,0xff80 }}, /* mask for the Y position */ - {{ 0,0,0,0x0070 }}, /* mask for the width, in tiles*/ - {{ 0,0,0,0x0007 }}, /* mask for the height, in tiles */ - {{ 0,0,0,0x0008 }}, /* mask for the horizontal flip */ - {{ 0 }}, /* mask for the vertical flip */ - {{ 0,0,0x0070,0 }}, /* mask for the priority */ - {{ 0 }}, /* mask for the neighbor */ - {{ 0 }}, /* mask for absolute coordinates */ - - {{ 0 }}, /* mask for the special value */ - 0 /* resulting value to indicate "special" */ -}; - -VIDEO_START_MEMBER(eprom_state,eprom) -{ - /* save states */ - save_item(NAME(m_screen_intensity)); - save_item(NAME(m_video_disable)); -} - - -const atari_motion_objects_config eprom_state::s_guts_mob_config = -{ - 0, /* index to which gfx system */ - 1, /* number of motion object banks */ - 1, /* are the entries linked? */ - 0, /* are the entries split? */ - 0, /* render in reverse order? */ - 0, /* render in swapped X/Y order? */ - 0, /* does the neighbor bit affect the next object? */ - 8, /* pixels per SLIP entry (0 for no-slip) */ - 0, /* pixel offset for SLIPs */ - 0, /* maximum number of links to visit/scanline (0=all) */ - - 0x100, /* base palette entry */ - 0x100, /* maximum number of colors */ - 0, /* transparent pen index */ - - {{ 0x03ff,0,0,0 }}, /* mask for the link */ - {{ 0,0x7fff,0,0 }}, /* mask for the code index */ - {{ 0,0,0x000f,0 }}, /* mask for the color */ - {{ 0,0,0xff80,0 }}, /* mask for the X position */ - {{ 0,0,0,0xff80 }}, /* mask for the Y position */ - {{ 0,0,0,0x0070 }}, /* mask for the width, in tiles*/ - {{ 0,0,0,0x000f }}, /* mask for the height, in tiles */ - {{ 0,0x8000,0,0 }}, /* mask for the horizontal flip */ - {{ 0 }}, /* mask for the vertical flip */ - {{ 0,0,0x0070,0 }}, /* mask for the priority */ - {{ 0 }}, /* mask for the neighbor */ - {{ 0 }}, /* mask for absolute coordinates */ - - {{ 0 }}, /* mask for the special value */ - 0 /* resulting value to indicate "special" */ -}; - -VIDEO_START_MEMBER(eprom_state,guts) -{ - /* save states */ - save_item(NAME(m_screen_intensity)); - save_item(NAME(m_video_disable)); -} - - - -/************************************* - * - * Periodic scanline updater - * - *************************************/ - -void eprom_state::scanline_update(screen_device &screen, int scanline) -{ - /* update the playfield */ - if (scanline == 0) - { - int xscroll = (m_alpha_tilemap->basemem_read(0x780) >> 7) & 0x1ff; - int yscroll = (m_alpha_tilemap->basemem_read(0x781) >> 7) & 0x1ff; - m_playfield_tilemap->set_scrollx(0, xscroll); - m_playfield_tilemap->set_scrolly(0, yscroll); - m_mob->set_scroll(xscroll, yscroll); - } -} - - - -/************************************* - * - * Main refresh - * - *************************************/ - -uint32_t eprom_state::screen_update_eprom(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) -{ - if (m_video_disable) - { - bitmap.fill(m_palette->black_pen(), cliprect); - return 0; - } - - update_palette(); - - // start drawing - m_mob->draw_async(cliprect); - - /* draw the playfield */ - m_playfield_tilemap->draw(screen, bitmap, cliprect, 0, 0); - - // draw and merge the MO - bitmap_ind16 &mobitmap = m_mob->bitmap(); - for (const sparse_dirty_rect *rect = m_mob->first_dirty_rect(cliprect); rect != nullptr; rect = rect->next()) - for (int y = rect->top(); y <= rect->bottom(); y++) - { - uint16_t *mo = &mobitmap.pix16(y); - uint16_t *pf = &bitmap.pix16(y); - for (int x = rect->left(); x <= rect->right(); x++) - if (mo[x] != 0xffff) - { - /* verified from the GALs on the real PCB; equations follow - * - * --- FORCEMC0 forces 3 bits of the MO color to 0 under some conditions - * FORCEMC0=!PFX3*PFX4*PFX5*!MPR0 - * +!PFX3*PFX5*!MPR1 - * +!PFX3*PFX4*!MPR0*!MPR1 - * - * --- SHADE selects an alternate color bank for the playfield - * !SHADE=!MPX0 - * +MPX1 - * +MPX2 - * +MPX3 - * +!MPX4*!MPX5*!MPX6*!MPX7 - * +FORCEMC0 - * - * --- PF/M is 1 if playfield has priority, or 0 if MOs have priority - * !PF/M=MPR0*MPR1 - * +PFX3 - * +!PFX4*MPR1 - * +!PFX5*MPR1 - * +!PFX5*MPR0 - * +!PFX4*!PFX5*!MPR0*!MPR1 - * - * --- M7 is passed as the upper MO bit to the GPC ASIC - * M7=MPX0*!MPX1*!MPX2*!MPX3 - * - * --- CL10-9 are outputs from the GPC, specifying which layer to render - * CL10 = 1 if pf - * CL9 = 1 if mo - * - * --- CRA10 is the 0x200 bit of the color RAM index; it comes directly from the GPC - * CRA10 = CL10 - * - * --- CRA9 is the 0x100 bit of the color RAM index; is comes directly from the GPC - * or if the SHADE flag is set, it affects the playfield color bank - * CRA9 = SHADE*CL10 - * +CL9 - * - * --- CRA8-1 are the low 8 bits of the color RAM index; set as expected - */ - int mopriority = (mo[x] >> atari_motion_objects_device::PRIORITY_SHIFT) & 7; - int pfpriority = (pf[x] >> 4) & 3; - int forcemc0 = 0, shade = 1, pfm = 1, m7 = 0; - - /* upper bit of MO priority signals special rendering and doesn't draw anything */ - if (mopriority & 4) - continue; - - /* compute the FORCEMC signal */ - if (!(pf[x] & 8)) - { - if (((pfpriority == 3) && !(mopriority & 1)) || - ((pfpriority & 2) && !(mopriority & 2)) || - ((pfpriority & 1) && (mopriority == 0))) - forcemc0 = 1; - } - - /* compute the SHADE signal */ - if (((mo[x] & 0x0f) != 1) || - ((mo[x] & 0xf0) == 0) || - forcemc0) - shade = 0; - - /* compute the PF/M signal */ - if ((mopriority == 3) || - (pf[x] & 8) || - (!(pfpriority & 1) && (mopriority & 2)) || - (!(pfpriority & 2) && (mopriority & 2)) || - (!(pfpriority & 2) && (mopriority & 1)) || - ((pfpriority == 0) && (mopriority == 0))) - pfm = 0; - - /* compute the M7 signal */ - if ((mo[x] & 0x0f) == 1) - m7 = 1; - - /* PF/M and M7 go in the GPC ASIC and select playfield or MO layers */ - if (!pfm && !m7) - { - if (!forcemc0) - pf[x] = mo[x] & atari_motion_objects_device::DATA_MASK; - else - pf[x] = mo[x] & atari_motion_objects_device::DATA_MASK & ~0x70; - } - else - { - if (shade) - pf[x] |= 0x100; - if (m7) - pf[x] |= 0x080; - } - } - } - - /* add the alpha on top */ - m_alpha_tilemap->draw(screen, bitmap, cliprect, 0, 0); - - /* now go back and process the upper bit of MO priority */ - for (const sparse_dirty_rect *rect = m_mob->first_dirty_rect(cliprect); rect != nullptr; rect = rect->next()) - for (int y = rect->top(); y <= rect->bottom(); y++) - { - uint16_t *mo = &mobitmap.pix16(y); - uint16_t *pf = &bitmap.pix16(y); - for (int x = rect->left(); x <= rect->right(); x++) - if (mo[x] != 0xffff) - { - int mopriority = mo[x] >> atari_motion_objects_device::PRIORITY_SHIFT; - - /* upper bit of MO priority might mean palette kludges */ - if (mopriority & 4) - { - /* if bit 2 is set, start setting high palette bits */ - if (mo[x] & 2) - m_mob->apply_stain(bitmap, pf, mo, x, y); - } - } - } - return 0; -} - - -uint32_t eprom_state::screen_update_guts(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) -{ - if (m_video_disable) - { - bitmap.fill(m_palette->black_pen(), cliprect); - return 0; - } - - update_palette(); - - // start drawing - m_mob->draw_async(cliprect); - - /* draw the playfield */ - m_playfield_tilemap->draw(screen, bitmap, cliprect, 0, 0); - - // draw and merge the MO - bitmap_ind16 &mobitmap = m_mob->bitmap(); - for (const sparse_dirty_rect *rect = m_mob->first_dirty_rect(cliprect); rect != nullptr; rect = rect->next()) - for (int y = rect->top(); y <= rect->bottom(); y++) - { - uint16_t *mo = &mobitmap.pix16(y); - uint16_t *pf = &bitmap.pix16(y); - for (int x = rect->left(); x <= rect->right(); x++) - if (mo[x] != 0xffff) - { - int mopriority = (mo[x] >> atari_motion_objects_device::PRIORITY_SHIFT) & 7; - int pfpriority = (pf[x] >> 5) & 3; - - /* upper bit of MO priority signals special rendering and doesn't draw anything */ - if (mopriority & 4) - continue; - - /* check the priority */ - if (!(pf[x] & 8) || mopriority >= pfpriority) - pf[x] = mo[x] & atari_motion_objects_device::DATA_MASK; - } - } - - /* add the alpha on top */ - m_alpha_tilemap->draw(screen, bitmap, cliprect, 0, 0); - - /* now go back and process the upper bit of MO priority */ - for (const sparse_dirty_rect *rect = m_mob->first_dirty_rect(cliprect); rect != nullptr; rect = rect->next()) - for (int y = rect->top(); y <= rect->bottom(); y++) - { - uint16_t *mo = &mobitmap.pix16(y); - uint16_t *pf = &bitmap.pix16(y); - for (int x = rect->left(); x <= rect->right(); x++) - if (mo[x] != 0xffff) - { - int mopriority = mo[x] >> atari_motion_objects_device::PRIORITY_SHIFT; - - /* upper bit of MO priority might mean palette kludges */ - if (mopriority & 4) - { - /* if bit 2 is set, start setting high palette bits */ - if (mo[x] & 2) - m_mob->apply_stain(bitmap, pf, mo, x, y); - } - } - } - - return 0; -} |