Hi I have a SIM4-01 with motherboard and 1702A programmer card. I also have a MDS800 and a series II. I've not had time to play with the 8080 machines but the MDS800 has a Z80 ICE board in it. I have a number of other single board development units like SYM-1's. The most unusual unit I have is a development system for the Intel i2920 ( not a bit slice part ). These were Intel's early attempt to get into the DSP world. They'd have been great about a year earlier but the part was slow and limited in it's operations. I have a number of chips for it as well. These are programmable with a EPROM area for program space. I have an app note that shows how to make an audio spectrum analyser. Dwight