| Digital Equipment Corporation. TOPS-20 Monitor Calls Reference Manual. January 1980. Document AA-4166D-TM. |
....t ( event dispatch fg) #t) or to swap our computation with some other thread s: define (brain swap t) call cc ( k) swap thread cont t k) 2 11 fTops 20g There are no new ideas. The Tops 20 operating system employed multiple continuations over twenty years ago [Jsys]. Tops 20 system calls were invoked with the jsys instruction, which pushed the current program counter onto the stack and trapped into the kernel. If the system call completed successfully, the operating system returned to the user program at word pc 2, that is, skipping the word following the ....
Digital Equipment Corporation. TOPS-20 Monitor Calls Reference Manual. January 1980. Document AA-4166D-TM.
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