R_000300_VGA_RENDER_CONTROL
WREG32(R_000300_VGA_RENDER_CONTROL,
RREG32(R_000300_VGA_RENDER_CONTROL) & C_000300_VGA_VSTATUS_CNTL);
save->vga_render_control = RREG32(R_000300_VGA_RENDER_CONTROL);
WREG32(R_000300_VGA_RENDER_CONTROL, 0);
WREG32(R_000300_VGA_RENDER_CONTROL, save->vga_render_control);