CSE4117 Microprocessors Homework 1
Question 1 Logisim Part (50 Points)
1. Realize Reptile-8 in Logisim.
2.Connect register 0 to 4x7-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)
1
2+32+52+72+....+ TERMS2
4. When this sum is calculated, it must be loaded into register 0 and become visible in 4x7
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 (50 Points)
Realize the above system with Verilog and FPGA. In this case, you must connect 4x7 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.
