DVstart and ttstart are a part of the TIGCC Tools Suite v1.00 Beta 2

ttstart is a generic starting tool that will start nearly any program, 
dvstart is the same as ttstart with the exception that it is built with -DLEAKWATCH; once dvstart is sent to a calculator, it will be called ttstart

the difference between ttstart and dvstart is that dvstart will report possible memory leaks... which is useful for developers...
on the calculator, dvstart will become ttstart.

For more information on these programs, see tict.ticalc.org