Does the actived MDK-Community edition support c51?
The Keil MDK Community Edition covers Arm-based microcontrollers, but no embedded 8051 devices.
Keil's PK51 supports these:
https://developer.arm.com/Tools%20and%20Software/Keil%20PK51
Supported devices by PK51 are summarized here: https://www.keil.com/c51/chips.asp
Thanks rkopsch to share these information with me.