gtpm1m28 | TPF V4R1 Migration Guide: 3.1 to 4.1 |
Programming in the TPF 4.1 system requires address space awareness, which is knowing whether you are in the ECB virtual memory (EVM) or system virtual memory (SVM), and what storage you can access:
I/O servers process in the:
The control program uses the following new macros for managing the EVM and SVM address spaces.
You should minimize address space switching because the associated performance overhead is substantial.
There are several macros for which it is imperative that you know in which address space you are. These include:
See TPF System Macros for more information about the MPIFC and SOUTC macros. See TPF General Macros for more information about the VALBC macro.