SVGA_REG_ENABLE_DISABLE := 0 SVGA_REG_ENABLE_ENABLE := 1 SVGA_REG_ENABLE_HIDE := 2 SVGA_REG_ENABLE_ENABLE_HIDE := SVGA_REG_ENABLE_ENABLE | SVGA_REG_ENABLE_HIDE SVGA_REG_DISABLE := 0 SVGA_REG_ENABLE := 1 SVGA_REG_WIDTH := 2 SVGA_REG_HEIGHT := 3 SVGA_REG_BITS_PER_PIXEL := 7 SVGA_REG_BYTES_PER_LINE := 12