Editing Versatile Real-Time Executive (section)

==VRTX==
VRTX comes in several flavors: 
* VRTX: [[16-bit computing|16-bit]] VRTX, for Z8000, 8086, etc.
* VRTX-32: [[32-bit computing|32-bit]] VRTX, for M68K, AMD29K, etc.
* MPV: Multiprocessor VRTX for distributed applications, such as distributed across VME backplanes.
* VRTX-mc: Micro-Controller VRTX, for small systems needing minimal memory use.
* VRTX-oc: On-chip VRTX, [[freeware]] community [[source code]] for personal and academic use, license required for commercial use.
* VRTX-sa: Scalable Architecture VRTX for full operating system features. Loosely based on [[Carnegie Mellon University]]'s [[Mach (kernel)|Mach]] [[microkernel]] principles.
* SPECTRA: [[Virtual machine]] (VM) implementation for running a VRTX VM on [[Unix-like]] hosts. Also includes an open [[integrated development environment]] allowing third-party tools open access to cross-development resources.<ref>{{cite news |url=http://www.CBRonline/news/ready_systems_introduces_spectra_environment_for_developing_real_time_embedded_systems |title=Ready Systems introduces Spectra environment for developing real time embedded systems |date=September 30, 1992 |work=Computer Business Review}}</ref>

Most companies developing software with VRTX use [[reduced instruction set computer]] (RISC) [[microprocessor]]s including [[ARM architecture|ARM]], [[MIPS architecture|MIPS]], [[PowerPC]], or others.