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Diffstat (limited to 'src/mame/video/blstroid.cpp')
-rw-r--r-- | src/mame/video/blstroid.cpp | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/src/mame/video/blstroid.cpp b/src/mame/video/blstroid.cpp deleted file mode 100644 index 3eb2ef5bde1..00000000000 --- a/src/mame/video/blstroid.cpp +++ /dev/null @@ -1,167 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Aaron Giles -/*************************************************************************** - - Atari Blasteroids hardware - -****************************************************************************/ - -#include "emu.h" -#include "machine/atarigen.h" -#include "video/atarimo.h" -#include "includes/blstroid.h" - - - -/************************************* - * - * Tilemap callbacks - * - *************************************/ - -TILE_GET_INFO_MEMBER(blstroid_state::get_playfield_tile_info) -{ - uint16_t data = m_playfield_tilemap->basemem_read(tile_index); - int code = data & 0x1fff; - int color = (data >> 13) & 0x07; - SET_TILE_INFO_MEMBER(0, code, color, 0); -} - - - -/************************************* - * - * Video system start - * - *************************************/ - -const atari_motion_objects_config blstroid_state::s_mob_config = -{ - 1, /* 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? */ - 0, /* pixels per SLIP entry (0 for no-slip) */ - 0, /* pixel offset for SLIPs */ - 0, /* maximum number of links to visit/scanline (0=all) */ - - 0x000, /* base palette entry */ - 0x100, /* maximum number of colors */ - 0, /* transparent pen index */ - - {{ 0,0,0x0ff8,0 }}, /* mask for the link */ - {{ 0,0x3fff,0,0 }}, /* mask for the code index */ - {{ 0,0,0,0x000f }}, /* mask for the color */ - {{ 0,0,0,0xffc0 }}, /* mask for the X position */ - {{ 0xff80,0,0,0 }}, /* mask for the Y position */ - {{ 0 }}, /* mask for the width, in tiles*/ - {{ 0x000f,0,0,0 }}, /* mask for the height, in tiles */ - {{ 0,0x8000,0,0 }}, /* mask for the horizontal flip */ - {{ 0,0x4000,0,0 }}, /* mask for the vertical flip */ - {{ 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(blstroid_state,blstroid) -{ - m_irq_off_timer = timer_alloc(TIMER_IRQ_OFF); - m_irq_on_timer = timer_alloc(TIMER_IRQ_ON); -} - - - -/************************************* - * - * Periodic scanline updater - * - *************************************/ - -void blstroid_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) -{ - switch (id) - { - case TIMER_IRQ_OFF: - /* clear the interrupt */ - scanline_int_ack_w(); - break; - case TIMER_IRQ_ON: - /* generate the interrupt */ - scanline_int_write_line(1); - update_interrupts(); - break; - default: - atarigen_state::device_timer(timer, id, param, ptr); - break; - } -} - - -void blstroid_state::scanline_update(screen_device &screen, int scanline) -{ - int offset = (scanline / 8) * 64 + 40; - - /* check for interrupts */ - if (offset < 0x1000) - if (m_playfield_tilemap->basemem_read(offset) & 0x8000) - { - /* FIXME: - the only thing this IRQ does it tweak the starting MO link */ - /* unfortunately, it does it too early for the given MOs! */ - /* perhaps it is not actually hooked up on the real PCB... */ - return; - - /* set a timer to turn the interrupt on at HBLANK of the 7th scanline */ - /* and another to turn it off one scanline later */ - int width = screen.width(); - int vpos = screen.vpos(); - attotime period_on = screen.time_until_pos(vpos + 7, width * 0.9); - attotime period_off = screen.time_until_pos(vpos + 8, width * 0.9); - - m_irq_on_timer->adjust(period_on); - m_irq_off_timer->adjust(period_off); - } -} - - - -/************************************* - * - * Main refresh - * - *************************************/ - -uint32_t blstroid_state::screen_update_blstroid(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) -{ - // 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 via schematics - - priority address = HPPPMMMM - */ - int priaddr = ((pf[x] & 8) << 4) | (pf[x] & 0x70) | ((mo[x] & 0xf0) >> 4); - if (m_priorityram[priaddr] & 1) - pf[x] = mo[x]; - } - } - return 0; -} |