Dr. Debono–a professor at the University of  Malta, has modified and debugged the RTOS in my book with successful results. He has graciously provided them freely for (non-commercial) use (of course, with no warranty or assumed liability). The two different systems, one in A51 and one in C, are found in the files on the accompanying web pages. If you wish to contact him, here are his address and web addresses.

Paul P. Debono
27, “NOERI”, Triq id-Dahla ta’ San Tumas,
Zejtun ZTN 04 – MALTA
Email: ppdebo@yahoo.com or ppdebo@eng.um.edu.mt