Xtreme Liteos 8.1 |work| Official

Because Windows 8.1 reached its End of Life on January 10, 2023 , it no longer receives official security updates from Microsoft.

Xtreme LiteOS 8.1 is the first RTOS to fully integrate at the kernel level. The power manager, known as “Tickerless NanoSleep,” replaces traditional system tick interrupts with a programmable comparator that wakes the CPU only when a timer expires or an external interrupt arrives. In deep sleep mode (Retention State L4), the entire system—including the kernel’s scheduler data structures—resides in battery-backed SRAM, drawing just 50 nA. xtreme liteos 8.1