Computer Science 010
Introduction to Computer Applications

Fall 2010, Siena College

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Lecture 06: Architecture; File Formats; Analog/Digital Conversions
Date: Monday, September 27, 2010

Agenda

Lecture Assignment 06

Due at the start of class, Wednesday, September 29.

Please submit answers to these questions in Blackboard by the start of class. We will discuss these questions at the start of class, so no late submissions are accepted. We discussed the SIENAVAC architecture in class. Suppose someone has loaded the first several locations of SIENAVAC's memory with the following data:

Addr

Contents
00000 001 00101
00001 100 00101
00010 010 00011
00011 110 01101
00100 111 00011
00101 111 11111
00110 000 01010

  1. What SIENAVAC instruction is represented by each of these values? For example, the instruction at memory location 00000 has an opcode of 001, which corresponds to LOAD, and the remainder of the memory value, 00101, indicates that the value LOADed should come from memory location 001012 = 510.
  2. Now suppose someone places the starting address of 0 into SIENAVAC's PROG ADDR field, and presses "Start". Trace through the execution of the program and indicate the final contents of the ACCUMULATOR and any memory locations that change from their initial values.

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