Hello Regis Wernet,
regarding your questioin:
- is v6.3 compatible with Multilink MON08 Rev C ?
YES, CW v6.3 compatible with Multilink MON08 Rev C, but CW v6.3 only works in Windows XP, it does not work in Win 7 or later system.
CW v6.3 can also be used to program HC08 MCU.
- can v10.6 help program HC08 CPUs (we haven't found them in any list) ?
NO, CW v10.6 does not support HC08 MCU.
PS: FSL HC08 family is not produced any longer, if you want to develop a new application, then, I would suggest using 32 bits Kinetis serial MCU.