Xerox 3270 manual

3270 Programmer’s Guide Manipulation of Temporary and Permanent Memory 3. Manipulation of Temporary and Permanent Memory Areas When your settings have been downloaded to the temporary memory through the FSL Functions, you may wish to save them permanently for future uses. For this purpose, special commands can be used. Once the settings have been saved, the converter will read them each time power is turned on, or when it registers a special command in the datastream. Section 3.1. The Three Levels of Settings and Section 3.3 Action at Power On explain the interaction of the three levels of settings and the actions taking place when power is turned on. Section 3.2. Commands for Storing and Restoring Settingsdescribes the commands that manipulate the temporary and the permanent memory areas. Section 3.4. Restricting Access explains the special facility which enables you to restrict access to the temporary and/or the permanent memory areas. 3.1. The Three Levels of Settings The converter stores settings on three different levels: 1. The Factory Default Area 2. The Permanent Memory 3. The Temporary Memory The temporary memory settings constitute the first level. When the converter operates, it always retrieves information from the temporary memory area to determine the next action required. The factory default and permanent memory areas are used only when power is turned on, or when a specified command to read them is registered. - 17 -