CSE 260 – Digital Computers: Organization and Logical Design
1. (10 points). The figure below shows a simulation of the washu-1 processor, with some items blanked out. Fill in the blanks below with the correct value from the corresponding labeled blank in the simulation output. The instruction set appears at the bottom of the page. A. ______________ B. ______________ C. ______________ D. ______________ E. ______________
0000 0001 1xxx 2xxx 3xxx 4xxx 5xxx
halt negate immediate load direct load indirect load direct store indirect store
6xxx 7xxx 8xxx 9xxx axxx dxxx
branch branch if zero branch if positive branch if negative add and
2. (8 points) Draw a transistor-level diagram (using n-FETs and p-FETs) of a NAND gate with 3 inputs, A, B and C.
Suppose all three inputs are high initially and then A goes low, causing the output of the NAND gate to go from low to high. Let tLH be the time for this high to low transition. Now, suppose that input A..