#include "emu.h" #include "video/konicdev.h" #include "includes/aliens.h" /*************************************************************************** Callbacks for the K052109 ***************************************************************************/ void aliens_tile_callback( running_machine &machine, int layer, int bank, int *code, int *color, int *flags, int *priority ) { aliens_state *state = machine.driver_data(); *code |= ((*color & 0x3f) << 8) | (bank << 14); *color = state->m_layer_colorbase[layer] + ((*color & 0xc0) >> 6); } /*************************************************************************** Callbacks for the K051960 ***************************************************************************/ void aliens_sprite_callback( running_machine &machine, int *code, int *color, int *priority_mask, int *shadow ) { aliens_state *state = machine.driver_data(); /* The PROM allows for mixed priorities, where sprites would have */ /* priority over text but not on one or both of the other two planes. */ switch (*color & 0x70) { case 0x10: *priority_mask = 0x00; break; /* over ABF */ case 0x00: *priority_mask = 0xf0 ; break; /* over AB, not F */ case 0x40: *priority_mask = 0xf0|0xcc ; break; /* over A, not BF */ case 0x20: case 0x60: *priority_mask = 0xf0|0xcc|0xaa; break; /* over -, not ABF */ case 0x50: *priority_mask = 0xcc ; break; /* over AF, not B */ case 0x30: case 0x70: *priority_mask = 0xcc|0xaa; break; /* over F, not AB */ } *code |= (*color & 0x80) << 6; *color = state->m_sprite_colorbase + (*color & 0x0f); *shadow = 0; /* shadows are not used by this game */ } /*************************************************************************** Start the video hardware emulation. ***************************************************************************/ VIDEO_START( aliens ) { aliens_state *state = machine.driver_data(); machine.generic.paletteram.u8 = auto_alloc_array(machine, UINT8, 0x400); state->m_layer_colorbase[0] = 0; state->m_layer_colorbase[1] = 4; state->m_layer_colorbase[2] = 8; state->m_sprite_colorbase = 16; state_save_register_global_pointer(machine, machine.generic.paletteram.u8, 0x400); } /*************************************************************************** Display refresh ***************************************************************************/ SCREEN_UPDATE( aliens ) { aliens_state *state = screen->machine().driver_data(); k052109_tilemap_update(state->m_k052109); bitmap_fill(screen->machine().priority_bitmap, cliprect, 0); bitmap_fill(bitmap, cliprect, state->m_layer_colorbase[1] * 16); k052109_tilemap_draw(state->m_k052109, bitmap, cliprect, 1, 0, 1); k052109_tilemap_draw(state->m_k052109, bitmap, cliprect, 2, 0, 2); k052109_tilemap_draw(state->m_k052109, bitmap, cliprect, 0, 0, 4); k051960_sprites_draw(state->m_k051960, bitmap, cliprect, -1, -1); return 0; }