diff options
Diffstat (limited to 'src/mame/video/bottom9.c')
-rw-r--r-- | src/mame/video/bottom9.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/src/mame/video/bottom9.c b/src/mame/video/bottom9.c new file mode 100644 index 00000000000..5e4e4ece206 --- /dev/null +++ b/src/mame/video/bottom9.c @@ -0,0 +1,97 @@ +#include "driver.h" +#include "video/konamiic.h" + + + +int bottom9_video_enable; + +static int layer_colorbase[3],sprite_colorbase,zoom_colorbase; + + +/*************************************************************************** + + Callbacks for the K052109 + +***************************************************************************/ + +static void tile_callback(int layer,int bank,int *code,int *color,int *flags,int *priority) +{ + *code |= (*color & 0x3f) << 8; + *color = layer_colorbase[layer] + ((*color & 0xc0) >> 6); +} + + +/*************************************************************************** + + Callbacks for the K051960 + +***************************************************************************/ + +static void sprite_callback(int *code,int *color,int *priority,int *shadow) +{ + /* bit 4 = priority over zoom (0 = have priority) */ + /* bit 5 = priority over B (1 = have priority) */ + *priority = (*color & 0x30) >> 4; + *color = sprite_colorbase + (*color & 0x0f); +} + + +/*************************************************************************** + + Callbacks for the K051316 + +***************************************************************************/ + +static void zoom_callback(int *code,int *color,int *flags) +{ + *flags = (*color & 0x40) ? TILE_FLIPX : 0; + *code |= ((*color & 0x03) << 8); + *color = zoom_colorbase + ((*color & 0x3c) >> 2); +} + + +/*************************************************************************** + + Start the video hardware emulation. + +***************************************************************************/ + +VIDEO_START( bottom9 ) +{ + layer_colorbase[0] = 0; /* not used */ + layer_colorbase[1] = 0; + layer_colorbase[2] = 16; + sprite_colorbase = 32; + zoom_colorbase = 48; + K052109_vh_start(machine,REGION_GFX1,NORMAL_PLANE_ORDER,tile_callback); + K051960_vh_start(machine,REGION_GFX2,NORMAL_PLANE_ORDER,sprite_callback); + K051316_vh_start_0(machine,REGION_GFX3,4,FALSE,0,zoom_callback); +} + + + +/*************************************************************************** + + Display refresh + +***************************************************************************/ + +VIDEO_UPDATE( bottom9 ) +{ + K052109_tilemap_update(); + + /* note: FIX layer is not used */ + fillbitmap(bitmap,machine->pens[layer_colorbase[1]],cliprect); +// if (bottom9_video_enable) + { + K051960_sprites_draw(bitmap,cliprect,1,1); + K051316_zoom_draw_0(bitmap,cliprect,0,0); + K051960_sprites_draw(bitmap,cliprect,0,0); + tilemap_draw(bitmap,cliprect,K052109_tilemap[2],0,0); + /* note that priority 3 is opposite to the basic layer priority! */ + /* (it IS used, but hopefully has no effect) */ + K051960_sprites_draw(bitmap,cliprect,2,3); + tilemap_draw(bitmap,cliprect,K052109_tilemap[1],0,0); + } + return 0; +} |