For those looking for supplementary materials or quick reference notes, academic portals like
Federal University of Agriculture, Abeokuta (FUNAIB) Library Embedded Real Time Systems Kvkk Prasad embedded real time systems kvkk prasad pdf
Use simulation tools (Proteus, QEMU) to test Prasad’s concepts, but always move to real hardware. The "real-time" in the title means physical timing. A button debounce in a simulation is trivial; on real hardware, it requires interrupt management. For those looking for supplementary materials or quick
FreeRTOS, VxWorks, QNX, RT-Linux.