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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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Read Protect Key (RPK)0 5 8 11 16 20 26 31Op code R Fun Zeros Mod DA MA0 0 0 0 1 X X X 0 0 0 0 0 0 0 0 0 0 1 0 * * * * * * * * * * * *1111 II 11 1111 III 11111 1 1 1 1 10 8-F 0 0 2 0 0 0Bits 13 through 15 of a register, or <strong>the</strong> accumulator if R = 000, are replaced by <strong>the</strong>contents of <strong>the</strong> protect key. The result indicators are changed to reflect <strong>the</strong> value loadedinto <strong>the</strong> register. The carry and overflow indicators are reset to 0.Example:0 5 8 11 16 20 26 31RPK instructionOp code R Fun Zeros Mod DA MA0 0 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 01111 11 II 1111 III 11111 1 1 1 1 10 B 0 0 2 0 0 0Index register 3Protect key register0 15 0 15RPK instructionis fetched1 I 1 1 1 1 1 I 1 1 1 1 1 1 1`....1■••••,....."`■•••••••,...../ ••■•■•••,,•••■,,memKey0 0 0 0 0 0 0 0 0 0 0 0 011 1 1111111111111111X X X X 0 0 0 70 15 0 15After RPKinstructionexecution 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1111111111111111 1111111111111110 0 0 7 0 0 0 74-54 GA34-0003

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