in olden days desadi taala was reckoned differently as follows.VK
dESAdi, as name suggests, is a variety of AditALa with eDupu at a point 1 1/2 beats ater the start of Adi tALa. Th5s tALa is believed to have been imported by tyAgarAja intou our system from Hindustani music. Apart from the sole gaNanAyakam by MD(pUrNaShaDja/rudrapriya), tyAgarAja appears to be the earliest to have composed in this tALa. He of course has several compositions in this tALa.
The tALa was reckoned diferently in the olden days but is now shown like Adi tALa only. vid|| R.K.Padmanabha has demonstrated and used the earlier manner of reckoning the tALa in several of his concerts.
eduppu at a point 1 1/2 beats after the start. like after thakita first a beat then(nishabda or silent) i.e.turn the palm as in dhrutha and it should be followed by 6 beats. there is no laghu in this taala.