diff options
Diffstat (limited to 'src/mame/video/lvcards.c')
-rw-r--r-- | src/mame/video/lvcards.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/mame/video/lvcards.c b/src/mame/video/lvcards.c new file mode 100644 index 00000000000..dd4505f2c51 --- /dev/null +++ b/src/mame/video/lvcards.c @@ -0,0 +1,115 @@ +/*************************************************************************** + + video.c + + Functions to emulate the video hardware of the machine. + +***************************************************************************/ + +#include "driver.h" + +static tilemap *bg_tilemap; + +PALETTE_INIT( ponttehk ) +{ + int i; + + for ( i = 0; i < machine->drv->total_colors; i++ ) + { + int bit0,bit1,bit2,bit3,r,g,b; + + /* red component */ + bit0 = (color_prom[0] >> 0) & 0x01; + bit1 = (color_prom[0] >> 1) & 0x01; + bit2 = (color_prom[0] >> 2) & 0x01; + bit3 = (color_prom[0] >> 3) & 0x01; + r = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3; + + /* green component */ + bit0 = (color_prom[machine->drv->total_colors] >> 0) & 0x01; + bit1 = (color_prom[machine->drv->total_colors] >> 1) & 0x01; + bit2 = (color_prom[machine->drv->total_colors] >> 2) & 0x01; + bit3 = (color_prom[machine->drv->total_colors] >> 3) & 0x01; + g = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3; + + /* blue component */ + bit0 = (color_prom[2*machine->drv->total_colors] >> 0) & 0x01; + bit1 = (color_prom[2*machine->drv->total_colors] >> 1) & 0x01; + bit2 = (color_prom[2*machine->drv->total_colors] >> 2) & 0x01; + bit3 = (color_prom[2*machine->drv->total_colors] >> 3) & 0x01; + b = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3; + + palette_set_color(machine,i,MAKE_RGB(r,g,b)); + + color_prom++; + } +} + +PALETTE_INIT( lvcards ) //Ever so slightly different, but different enough. +{ + int i; + + for ( i = 0; i < machine->drv->total_colors; i++ ) + { + int bit0,bit1,bit2,bit3,r,g,b; + + /* red component */ + bit0 = (color_prom[0] >> 0) & 0x11; + bit1 = (color_prom[0] >> 1) & 0x11; + bit2 = (color_prom[0] >> 2) & 0x11; + bit3 = (color_prom[0] >> 3) & 0x11; + r = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3; + + /* green component */ + bit0 = (color_prom[machine->drv->total_colors] >> 0) & 0x11; + bit1 = (color_prom[machine->drv->total_colors] >> 1) & 0x11; + bit2 = (color_prom[machine->drv->total_colors] >> 2) & 0x11; + bit3 = (color_prom[machine->drv->total_colors] >> 3) & 0x11; + g = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3; + + /* blue component */ + bit0 = (color_prom[2*machine->drv->total_colors] >> 0) & 0x11; + bit1 = (color_prom[2*machine->drv->total_colors] >> 1) & 0x11; + bit2 = (color_prom[2*machine->drv->total_colors] >> 2) & 0x11; + bit3 = (color_prom[2*machine->drv->total_colors] >> 3) & 0x11; + b = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3; + + palette_set_color(machine,i,MAKE_RGB(r,g,b)); + + color_prom++; + } +} + +WRITE8_HANDLER( lvcards_videoram_w ) +{ + videoram[offset] = data; + tilemap_mark_tile_dirty(bg_tilemap, offset); +} + +WRITE8_HANDLER( lvcards_colorram_w ) +{ + colorram[offset] = data; + tilemap_mark_tile_dirty(bg_tilemap, offset); +} + +static TILE_GET_INFO( get_bg_tile_info ) +{ + int attr = colorram[tile_index]; + int code = videoram[tile_index] + ((attr & 0x30) << 4) + ((attr & 0x80) << 3); + int color = attr & 0x0f; + int flags = (attr & 0x40) ? TILE_FLIPX : 0; + + SET_TILE_INFO(0, code, color, flags); +} + +VIDEO_START( lvcards ) +{ + bg_tilemap = tilemap_create(get_bg_tile_info, tilemap_scan_rows, + TILEMAP_TYPE_PEN, 8, 8, 32, 32); +} + +VIDEO_UPDATE( lvcards ) +{ + tilemap_draw(bitmap, cliprect, bg_tilemap, 0, 0); + return 0; +} |