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Unformatted text preview: National Taiwan University Introduction to Computer Science April 18, 2007 Your Name:___________________ Your Student ID:___________________ A. Guidelines: • You can use a calculator • Do not un-staple the exam • Show all your work to receive partial credit even you are unsure the final answer • Max 2 hours The following table is from Appendix C of the text. It is included here so that it can be incorporated in tests for student reference. Questions in this test bank refer to this table as the “language description table.” Op- code Operand Description 1 RXY LOAD the register R with the bit pattern found in the memory cell whose address is XY. Example: 14A3 would cause the contents of the memory cell located at address A3 to be placed in register 4. 2 RXY LOAD the register R with the bit pattern XY. Example: 20A3 would cause the value A3 to be placed in register 0. 3 RXY STORE the bit pattern found in register R in the memory cell whose address is XY. Example: 35B1 would cause the contents of register 5 to be placed in the memory cell whose address is B1. 4 0RS MOVE the bit pattern found in register R to register S. Example: 40A4 would cause the contents of register A to be copied into register 4. 5 RST ADD the bit patterns in registers S and T as though they were two’s complement representations and leave the result in register R. Example: 5726 would cause the binary values in registers 2 and 6 to be added and the sum placed in register 7. 6 RST ADD the bit patterns in registers S and T as though they represented values in floating-point notation and leave the floating-point result in register R. Example: 634E would cause the values in registers 4 and E to be added as floating-point values and the result to be placed in register 3. 7 RST OR the bit patterns in registers S and T and place the result in register R. Example: 7CB4 would cause the result of ORing the contents of registers B and 4 to be placed in register C....
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- Spring '07
- Most significant bit, language description table, bit pattern