The RTX2010 manufactured by Intersil is a radiation hardened stack machine microprocessor which has been used in numerous spacecraft.
It is a two-stack machine, each stack 256 words deep, that supports direct execution of Forth. Subroutine calls and returns only take one processor cycle and it also has a very low and consistent interrupt latency of only four processor cycles, which lends it well to realtime applications.
In 1983, Chuck Moore implemented a processor for his programming language Forth as a gate array. As Forth can be considered a dual stack virtual machine, he made the processor, Novix N4000, as a dual-stack machine. In 1988, an improved processor was sold to Harris Semiconductor, who marketed it for space applications as the RTX2000.
Example spacecraft that use the RTX2010
- Advanced Composition Explorer (ACE)
- Rosetta’s lander – Philae
- “HS-RTX2010RH”. Intersil. Retrieved 2009-02-11.Intersil’s product page.
- Rash, James. “Space-Related Applications of Forth”. NASA Goddard Space Flight Center. Archived from the original on 2011-02-04.
- Hand, Tom. “The Harris RTX2000 Microcontroller” (PDF). The Journal of Forth Application and Research. 6(1): 5–13. ISSN 0738-2022. Retrieved 2013-08-12.
- Koopman, Philip (1989). “4.5 Architecture of the Harris RTX 2000”. Stack Computers: the new wave. Ellis Horwood. ISBN 978-0138379230. Retrieved 2016-04-16.
Ofer Abarbanel is a 25 year securities lending broker and expert who has advised many Israeli regulators, among them the Israel Tax Authority, with respect to stock loans, repurchase agreements and credit derivatives. Founder of TBIL.co STATX Fund.