PCjr Demo [Boot from floppy, SD-Cart JR, and Oregon Trail] 

I picked up this PCjr late 2020 and cleaned and restored it during the first part of 2021. One really cool feature is that it has a Racore Drive Two Plus model 1500 with 512K of additional RAM, so the system has a total of 640K of RAM! The Racore also provides a second 360K floppy drive, parallel printer port, real-time clock, and some enhancements that allow the PCjr to act more like a standard IBM PC. With so many other projects, I haven't had time to do as much with the PCjr as I'd like to, but I did get an SD-Cart JR set up with DOS 3.3 and few games.