|Polaroid of my past|
The calculator is a TI Programmer (hexadecimal calculator) for scale.
I used it for 6502 software testing as well as driving external devices. Software development was on an Apple II using a source assembler. The resultant binary file was written to tge 2716 with an EPROM programmer. I was proud of the fact that the 6502 was clocked at 2MHz, twice as fast as the Apple II's 1MHz clock speed. That and the fact its memory was fully static meant the system ran with no wait states. I used it for driving stepper motors at one point, and then built a light tracker and then combined all that into a simple wheeled line tracker. I had big dreams back then. I was going to build Asimov-like robots. I wonder what happened to them all...
The image at the top is a scan of a black and white Polaroid I took of it all and sent off to someone I haven't heard from in 32 years. He scanned it and sent it back to me this evening.