Hi I want to start studying CMSIS-RTOS but I couldn't find any user manual for it. there is some user manual for keil-RTX. what is difference between CMSIS-RTOS and keil-RTX? I read in a document that RTX is provided by ARM as the reference implementation for CMSIS-RTOS compliant RTOS implementations. Can I start to study keil-RTX user manual as CMSIS-RTOS reference. thanks