What settings have to do in Icprog 1.05C when using the DL2TM programmer for AT89C2051?

Since the at89c2051 is not in the device list, the answer must be "none".

The one area in which there is no standard or even the shadow of one in the '51 family is programming algorithms. Of course, different manufacturesrs will make a difference but even devices from the same manufacturer will often have different algorithms.

Thus, before selecting any programming tool read the devicelist.

Today with the ISP dominance the difference is still as balatant: Philips with FlashMagic, Atmel with Flip, SILabs with "IDE" etc, but, at least, that is just a matter of multiple softwares.

Erik