Instruction Set used in SIC/XE Last Updated : 29 Aug, 2023 Summarize Comments Improve Suggest changes Share Like Article Like Report Pre-Requisite: SIC/XE Architecture SIC/XE (Simplified Instructional Computer Extra Equipment or Extra Expensive). SIC/XE is an advanced version of SIC. Both SIC and SIC/XE are closely related to each other that’s why they are Upward Compatible. Below mentioned are the instructions that are used in SIC/XE (Simplified Instructional Computer Extra Equipment or Extra Expensive) Architecture. You can view the instructions that are particularly used in SIC Architecture. Before Proceeding to the table, we will be clear that M stands for Memory R1 and R2 are registers (A, B, S, T). MNEMONICOPERANDOPCODEEXPLANATIONADDRR1, R290R2 = R2 + R1CLEAR R104R1 = 0COMPRR1, R2A0compares R1 and R2DIVRR1, R29CR2 = R2 / R1LDBM68B = MLDSM6CS = MLDTM74T = MMULRR1, R298R2 = R2 * R1RMOR1, R2ACR2 = R1SHIFTLR1, nA4left shifts R1 n timesSHIFTRR1, nA8right shifts R1 n timesSTBM78M = BSTSM7CM = SSTTM84M = TSUBRR1, R294R2 = R2 - R1TIXRR1B8X = X + 1; compares X and R1 Comment More infoAdvertise with us Next Article RISC and CISC in Computer Organization Y Yash_R Follow Improve Article Tags : Computer Organization & Architecture microprocessor Similar Reads Computer Organization and Architecture Tutorial In this Computer Organization and Architecture Tutorial, you’ll learn all the basic to advanced concepts like pipelining, microprogrammed control, computer architecture, instruction design, and format. Computer Organization and Architecture is used to design computer systems. 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