The above finding also means, anyone that upgraded their Tasc R40 with the R30 version of King 2.50, will only be able to use 128KB RAM.

Speaking of Tasc R40, is the speaker pitch the same as R30? Or did they increase the CPU clock divider?

https://tsk-tsk.net/net/temp/riscs/tasc30mhz.mp3 (sounds exactly like real R30)
https://tsk-tsk.net/net/temp/riscs/tasc40mhz.mp3 (higher pitch)