ECS154A Homework #3

• Written homework due by 4:30 PM on Tuesday, February 6th.
• Lab assignment due Sunday, February 11th, 11:59 PM.

Assignment (Written):

1. Do Problem 8.1 in the book, using T FF's instead of D's.
2. Do Problem 8.5 in the book
3. Do Problem 8.6 in the book
4. Do Problem 8.9 in the book
5. Do Problem 8.21 in the book

LAB Assignment:

• Design an N-bit CPU. Details here
  (If above link does not work, try this one
  NOTE - do not start this problem until the TA lets you know he has updated the assignment!!!


• Consider a coin-operated vending machine. For simplicity, assume that the machine accepts only quarters and dimes. The quarters and dimes are applied as inputs until a total of 40 cents or more is deposited. Only one coin is deposited at a time. The output signal z1=1 should indicate that merchandise should be provided; z1=0 indicates no merchandise.
  
  Coincident with the last coin input, the (change) outputs are to be set. Assume the machine can give a dime (z2=1) and/or a nickel (z3=1). Use the binary outputs z2 and z3 to represent the 4 distinct possibilities (No change, 1 nickel, 1 dime, 1 nickel and 1 dime.) If a customer does something illogical (like puts in 3 dimes followed by a quarter, for example) correct change does not have to be provided (but *some* change does.)
  
  Design the circuit in Maxplus.