If you like to push buttons, I have tried these 2 options: 1, Kim Uno: https://obsolescence.wixsite.com/obsolescence/kim-uno-get-or-build-one https://obsolesce

If you like to push buttons, I have tried these 2 options: 1, Kim Uno: https://obsolescence.wixsite.com/obsolescence/kim-uno-get-or-build-one https://obsolescence.wixsite.com/obsolescence/kim-uno-get-or... - it is basically an Arduino emulating all the hardware of the KIM-1. Battery-powered, and fits in your (large) pocket. 2, PAL-1 replica board: https://www.tindie.com/products/tkoak/pal-1-a-mos-6502-powered-computer-kit/ https://www.tindie.com/products/tkoak/pal-1-a-mos-6502-power... - uses more-commonly-available parts than an original KIM-1 (e.g., 65C02 instead of the original NMOS part, and a RIOT+EPROM, instead of a mask-programmed RRIOT) but still a lot of fun to solder together. The creator has also made an expansion port and lots of gadgets to attach to it, including an optional backplane. Works with a DE-9 serial port! I have connected mine to a Digital VT520 serial terminal, among other things.