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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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CHECK CONTROL SwitchThis three-position switch has <strong>the</strong> following settings:1. PROCESS. Normal switch position; a program check, machine check, orpower/<strong>the</strong>rmal warning condition causes an interruption.2. STOP ON ERROR. A program check or machine check error causes <strong>the</strong> system to stopat <strong>the</strong> end of <strong>the</strong> machine cycle in which <strong>the</strong> error is detected. The stop lightis <strong>the</strong>n lit and <strong>the</strong> error condition displayed by <strong>the</strong> appropriate console indicators.A system reset must occur in order to clear this error.3. CHECK RESTART. A machine check or program check error causes system reset and<strong>the</strong> restart of program execution on priority level 3 at address 0000. This providesa looping facility for <strong>the</strong> customer engineer.Note: If <strong>the</strong> console controls are disabled, <strong>the</strong> test light does not turn on and <strong>the</strong>stop-on-error and check-restart switch positions function <strong>the</strong> same as <strong>the</strong> process position.RATE CONTROL SwitchThe three positions of this switch have <strong>the</strong> following effects:1. PROCESS. Normal position; permits continuous program execution.2. STOP ON STOR ADDR (stop on storage address). Whenever <strong>the</strong> contents of <strong>the</strong>processor storage address register match <strong>the</strong> address designated by <strong>the</strong> storagedata/address rotary switches, <strong>the</strong> machine stops at <strong>the</strong> end of <strong>the</strong> currentinstruction and <strong>the</strong> stop light is turned on. If <strong>the</strong> storage data/address switchesdesignate <strong>the</strong> address of an operand, <strong>the</strong> address displayed by <strong>the</strong> address lightswill be one greater than <strong>the</strong> address designated in <strong>the</strong> switches.3. INSTR STEP (instruction step). Operation of <strong>the</strong> start key causes one instructionto be executed. The machine <strong>the</strong>n stops and <strong>the</strong> stop light turns on.Note: If <strong>the</strong> console controls are disabled, <strong>the</strong> test light does not turn on and <strong>the</strong>stop-on-storage-address and instruction-step switch positions function <strong>the</strong> same as <strong>the</strong>process position.CONSOLE FUNCTION SWITCHES AND INDICATORSThe console function switches and indicators are shown in Figure 5-4.STOREMAINSTORAGEDISPLAYRESETONAUTORSTRTOFFPOWERONSTART STOP PROGRAMLOAD!CONSOLE CONTROLS IDISABLE • I • ENABLETHERMALONPOWEROFFFigure 5-4. Console function switches and indicators5-8 GA34-0003---.... - • . -....-, ,ONOOPOOPONIO OF lOOPPIIIIPPOOPOOINIONININOIO11

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