31. Implement a new unary instruction in place of NOP0 called STKADD. It should replace the two...

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31. Implement a new unary instruction in place of NOP0 called STKADD. It should replace the two topmost items on the stack with their sum. Set NZVC according to the results of the addition.

Use the test program provided in the Pep/9 app to test the features of the new instruction.

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Computer Systems

ISBN: 9781284079630

5th Edition

Authors: J Stanley Warford

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