Description
Question 1 Logisim Part
1. Realize Reptile-8 in Logisim.
2.Connect register 0 to 4×7-segment display unit.
3. Write a program which will have a variable named TERMS in its .data area. Your code should evaluate the sum (note that only square of odd numbers are added)
12+32+52+72+….+ TERMS2
4. When this sum is calculated, it must be loaded into register 0 and become visible in 4×7 segment display. After that, your program must enter into an infinite loop.
5. You must complete and use the assembler given in the lecture notes to assemble your code. 6. Your system must work with 4 KHz clock of Logisim.
Question 1 Verilog Part
Realize the above system with Verilog and FPGA. In this case, you must connect 4×7 segment display to Register 0 physically via GPIO pins of DE0-nano card. Your system must work with 50 MHz system clock. But, for debugging purposes, you may find it more convenient to connect your clock to a pushbutton (on FPGA) when developing the system.
Bonus for Question 1
You may write your programs to display your result in hexadecimal. But if you display your result in decimal, you will get an additional 10 points. For this, you must write an additional piece of code (Assembly code not in Verilog) to convert your hexadecimal result into decimal (or binary coded decimal, BCD). You must do this in software and NOT in hardware. Some hints on how this can be done is described in the following link: https://my.eng.utah.edu/~nmcdonal/Tutorials/BCDTutorial/BCDConversion.html
Disregard “BCD conversion in hardware” part.
