RTX64, extends, but does not modify, the Windows hardware abstraction layer (HAL) by adding a real-time subsystem (RTSS) to Windows that delivers deterministic, hard real-time performance. The HAL extension maintains interrupt isolation between RTSS and Windows, while providing inter-processors interrupt (IPI) communication between the two. Other real-time HAL extension features include: a software interrupt mechanism between RTSS and Windows; basic exception management; system-normal shutdown and dump file support; high-resolution clocks and timers for RTSS (except when setting up RTSS processors/cores to run in IA-32e mode or 64-bit sub-mode); and various enhancements for determinism.
