Leaded SolderI've updated the old #NEC #pc6001mkII article on my blog to document the differences between the various modes of NEC BASIC: https://www.leadedsolder.com/2019/10/23/pc6001mkii-pickup.html
It turns out actually reading the manual helps you understand the system! Maybe one day I'll finish fixing the keyboard.
PC-6001mkII, or, sometimes the sequel is better
My PC-6001 came cheap because it was untested (and it did end up needing capacitor replacement), but the PC-6001mkII seems like it has always changed hands for a lot of money in Japanese collector circles, at least for as long as I’ve been paying attention to the prices. When I landed one for a great deal, I figured that there must be something wrong with it.