TYPEMAP
const char *	T_PV

lsampl_t	T_U_INT
sampl_t	T_U_SHORT

comedi_t *	T_PTRREF
comedi_sv_t *	T_PTRREF
comedi_range *	T_PTRREF

# these are buffers: perl scalar holding binary data
#
comedi_trig *	T_PV
comedi_cmd *	T_PV
sampl_t *	T_PV
lsampl_t *	T_PV
double *	T_PV
buffer_t *	T_PV

Trigger *	T_PTROBJ