Assertion: computer's instruction | /r/CapableOf | call routine
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text: instructions, e.g., for the DCB macro -- DTF (Define The File) for DOS -- or a combination of code and constants, with the details of the expansion depending on the parameters of the macro instruction (such as a reference to a file and a data area for a READ instruction); the executable code often terminated in either a branch and link register instruction to call a routine, or a supervisor call instruction to call an operating system function directly.