Earlier quoted context omitted.
That's amazing. Even forces me to use the proper UK keymap on my US keyboard!
Trying to remember where * lived!
If you fancy a modern take on this environment, RISC OS Pico is the 32-bit ARM version of BBC BASIC on top of the 32-bit ARM version of Acorn MOS:
https://www.riscosopen.org/wiki/documentation/show/Software%...
Same language, editor, commands, etc. but about 2000x faster.
Runs great on a Raspberry Pi Zero, which is $5 and accepts USB peripherals & an HDMI screen.
https://www.raspberrypi.org/products/raspberry-pi-zero/
The same code will work but without fighting the weird restrictions of early-1980s hardware. (Even when emulated.)