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1. RISC-OS programs - Wimp2
Wimp2 is an alternative multitasker for Acorn RISC-OS which preemptively multitasks the application rather than cooperatively as the current RISC-OS Wimp does. It also provide various kernel enhancements such as a 1ms resolution interrupt timer.Wimp2 is designed to be broadly compatible with the existing application structure used by RISC-OS. The only difference is that the 17, 18 & 19 codes handler must be placed in a separate non-preempted routine so that Wimp messages requiring an immediate answer are not returned as unanswered by the Wimp (through a code 19). ...

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