int  l2_dtime;			/* seconds idle before dimming */
int  l2_dtrap;			/* time at which screen will goes dim (mch.s) */
int  l2_dimcont;		/* contrast setting when dimmed */
int  l2_crate;			/* rate at which contrast change occurs */
char l2_rcflag;			/* timeout pending flag for ramp contrast */
char l2_dimmed;			/* contrast is dimmed */
char l2_bvol;			/* bell volumn */
int  l2_bpitch;			/* bell pitch */
int  l2_btime;			/* bell time */
char l2_contrast;		/* current contrast setting */
char l2_desired;		/* desired contrast */
char l2_defcont;		/* default contrast */