Paul:
You mentioned SC/MP; I used to have an SC/MP (INS8060) development board. I'm not sure where it ever went to. In my late teen years, I was given an INS8073 sample, which was the successor to the SC/MP (INS8060). The INS8073 had 2.5K of mask ROM with NIBL (NATIONAL Industrial BASIC Language) built in. I designed a whole computer around it, software and all. It was housed in a COMPUTER PRODUCTS I/O chassis and used multiple add-in boards that plugged into the back-plane. I acquired a dot-matrix printer that Larry from THE LITTLE COMPUTER STORE (S. Florida) retired and let me have for $100. I took it to college with me and wrote a word processor using the tiny BASIC. I recently pulled the main board out of storage, which is all I kept from the whole computer. Since there is little to no information on "the net" for the INS8073, I decided to document the project and posted a blog on it. You may be interested.?
Peace and blessings.
