SIC/XE Program to Write a Subroutine for SIC that will read a record into a buffer

This System Software program demonstrates an sequence of instructions for SIC that will read a record in to a buffer.

Write a subroutine for SIC that will read a record into a buffer. The record may be any length from 1 to 100 bytes. The end of record is marked with a “null” character (ASCII code 00). The subroutine should place the length of the record read into a variable named LENGTH.

Source Code