CalibrationFixture.... I don't mean to hijack your thread, but you posted on the old Tek forum looking for info on the TMS203.  I have a DLA5204 and I suffer from a similar problem as you, I suspect.  I am looking for the Inverse Assembler (IA) software that will work for a 68020.  Do you have it?  As it so happens, I do have the DAS9200 68020 disk and possibly even some parts that might be of interest to you.  I have no idea if the disk is any good though now.  It is a 5.25 "old school" type, and I haven't dug out my old drive.  Even if I did, I am not sure that I'll be able to read it with a modern Windoze computer.