FP_DISPLAY_END
regp->fp_horiz_regs[FP_DISPLAY_END] = output_mode->hdisplay - 1;
regp->fp_vert_regs[FP_DISPLAY_END] = output_mode->vdisplay - 1;
regs->fp_horiz_regs[FP_DISPLAY_END] = output_mode->hdisplay - 1;
regs->fp_vert_regs[FP_DISPLAY_END] = output_mode->vdisplay - 1;