/*************************************************************************** video.c Functions to emulate the video hardware of the machine. ***************************************************************************/ #include "emu.h" #include "video/konicdev.h" #include "includes/ajax.h" /*************************************************************************** Callbacks for the K052109 ***************************************************************************/ void ajax_tile_callback( running_machine &machine, int layer, int bank, int *code, int *color, int *flags, int *priority ) { ajax_state *state = machine.driver_data(); *code |= ((*color & 0x0f) << 8) | (bank << 12); *color = state->m_layer_colorbase[layer] + ((*color & 0xf0) >> 4); } /*************************************************************************** Callbacks for the K051960 ***************************************************************************/ void ajax_sprite_callback( running_machine &machine, int *code, int *color, int *priority, int *shadow ) { /* priority bits: 4 over zoom (0 = have priority) 5 over B (0 = have priority) 6 over A (1 = have priority) never over F */ ajax_state *state = machine.driver_data(); *priority = 0xff00; /* F = 8 */ if ( *color & 0x10) *priority |= 0xf0f0; /* Z = 4 */ if (~*color & 0x40) *priority |= 0xcccc; /* A = 2 */ if ( *color & 0x20) *priority |= 0xaaaa; /* B = 1 */ *color = state->m_sprite_colorbase + (*color & 0x0f); } /*************************************************************************** Callbacks for the K051316 ***************************************************************************/ void ajax_zoom_callback( running_machine &machine, int *code, int *color, int *flags ) { ajax_state *state = machine.driver_data(); *code |= ((*color & 0x07) << 8); *color = state->m_zoom_colorbase + ((*color & 0x08) >> 3); } /*************************************************************************** Start the video hardware emulation. ***************************************************************************/ VIDEO_START( ajax ) { ajax_state *state = machine.driver_data(); state->m_layer_colorbase[0] = 64; state->m_layer_colorbase[1] = 0; state->m_layer_colorbase[2] = 32; state->m_sprite_colorbase = 16; state->m_zoom_colorbase = 6; /* == 48 since it's 7-bit graphics */ } /*************************************************************************** Display Refresh ***************************************************************************/ SCREEN_UPDATE( ajax ) { ajax_state *state = screen->machine().driver_data(); k052109_tilemap_update(state->m_k052109); bitmap_fill(screen->machine().priority_bitmap, cliprect, 0); bitmap_fill(bitmap,cliprect,get_black_pen(screen->machine())); k052109_tilemap_draw(state->m_k052109, bitmap, cliprect, 2, 0, 1); if (state->m_priority) { /* basic layer order is B, zoom, A, F */ k051316_zoom_draw(state->m_k051316, bitmap, cliprect, 0, 4); k052109_tilemap_draw(state->m_k052109, bitmap, cliprect, 1, 0, 2); } else { /* basic layer order is B, A, zoom, F */ k052109_tilemap_draw(state->m_k052109, bitmap, cliprect, 1, 0, 2); k051316_zoom_draw(state->m_k051316, bitmap, cliprect, 0, 4); } k052109_tilemap_draw(state->m_k052109, bitmap, cliprect, 0, 0, 8); k051960_sprites_draw(state->m_k051960, bitmap, cliprect, -1, -1); return 0; }