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IBM System/7 Functional Characteristics - All about the IBM 1130 ...

IBM System/7 Functional Characteristics - All about the IBM 1130 ...

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Interrupt PresentationThe printer attachment can interrupt on level 3 sublevel 1 or level 1, sublevel 1. Thelevel and displacement is controlled by wiring and cannot be altered by programming.When <strong>the</strong> processor services <strong>the</strong> interrupt request, <strong>the</strong> printer attachment presents:0 15Sublevel DA MA0 0 0 1 0 1 1 1 0 0 0 0 0 0 0 0III IIIII IIIIIDevice Not Ready. The Output Print command will result in an interruptpresentation with bits 2 and 3 present in Status Word 1.Not Attached/Off Line. When <strong>the</strong> printer attachment is under control of <strong>the</strong> CEpanel or power to <strong>the</strong> 5024 is Off, Code 3 will be returned to <strong>the</strong> Initiate I/O command.Operating and Programming RestrictionsIf <strong>the</strong> printer is in <strong>the</strong> ready condition before a power interruption, it will be ready after<strong>the</strong> power disturbance. The belt image buffer will have to be reinitialized. The formsposition will be lost if power is interrupted and will require operator intervention torealign <strong>the</strong> forms.A reset device command will not alter <strong>the</strong> belt image buffer.The completion status of <strong>the</strong> line being printed or spaced at <strong>the</strong> time of <strong>the</strong> systemreset is unknown. Recovery of this status, if desired, will require operator intervention.Switches and IndicatorsFigure 17-10 illustrates <strong>the</strong> printer switches and indicators.READYSPACEENABLEPRINTERCHECKOFORMSCHECK 0RESTOREDISABLEFigure 17-11. Printer switches and indicators

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