Assignment Task:
Task:
What You Need to Do
In this assignment you will create an improved and more detailed LMC (let’s call it LMC+). You will take the diagram of the LMC from Figure 7.2 page 197 and modify it as follows:
- LMC+ will use a 2 byte (16 bit) word (as opposed to the 3 decimal digit word of the original LMC), so the memory block needs to change accordingly
- LMC+ will show the MAR and MDR registers, as in Fig. 7.4 page 201 (with the appropriate number of lines, of course)
- LMC+ will allow up to 16 instructions (as opposed to the 9 of the original LMC)
- The 9 instructions of the original LMC remain, and need not be described again in your submission
- 5 new instructions need to be defined by you; use the discussion in section 7.6 in the textbook and select from the many types of instructions discussed there. For each new instruction you create, provide a paragraph describing it, just like the original LMC instructions are described on page 181
- The remaining 2 instruction codes are unused
- LMC+ will explicitly show the registers used: Accumulator (A), Program Counter (PC), and Instruction Register (IR) indicating the appropriate number of bits for each, as well as the proper bus connections between these registers.
- LMC+ will show the proper registers and I/O controllers for managing the In-Basket and Out-Basket, using the approach shown in figure 9.3 on page 273.
- The calculator in the LMC will be replaced by the ALU; the ALU will be assumed to have the capability to execute any of the arithmetic operations you need for your new instructions from point 3 above.
Your submission will consist of a Word document containing:
- The diagram for the LMC+ . You can create this with the graphic application of your choice (PowerPoint and Visio are two examples), but lacking those, you can simply draw it on paper. If you do so, please use a ruler, and make a clean, clear, and organized diagram. Free hand scribbled diagrams will not be accepted. Either way, save your diagram as an image, then cut and paste the image into the Word document.
- The descriptions for the 5 new instructions.
- Any additional explanations you feel are needed, but none are necessary if the diagram and the instruction descriptions are correct and complete.
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