https://gitlab.com/tkchia/GW-BASIC
https://robhagemans.github.io/pcbasic/ (or just pip install pcbasic)
The debug-commands seemed to work fine with the debug included by default in DOSBox-X, but I was too lazy to input all of the digits. I never had any idea how to use debug, so I learned something new here in addition to some more things about mnemonics.