Memory layout of a data structure: Difference between revisions

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===version 2===
Checks could be added to verify the number of pins selected, and also verify if the data (pin readings) specified is valid.
<lang rexx>/*REXX pgm displays which pins are active of a 9 or 24 pin RS-232 plug. */
call rs_232 24, 127 /*value for an RS-232 24 pin plug*/