Binary coded decimal exercises
What is the difference between i binary coded decimal exercises and magnitude; ii ones-complement; and iii twos-complement representations of binary numbers? What are the pros and cons of each? Which is the most frequently used? Explain what is meant by the term binary coded decimal. What are the advantages and disadvantages of using it in preference to straightforward binary?
In what contexts binary coded decimal exercises it used? When was it standardised? What more recent standards have binary coded decimal exercises based on it? First adopted in [ http: ISO in Current standard is X3. What is a parity bit used for, and what are the different ways in which parity can be implemented? What is each used for? How much of each might a typical PC have? What is the fetch-execute cycle of a computer?
Why is it binary coded decimal exercises List the steps of a typical fetch-execute cycle. Explain the terms binary coded decimal exercises, byte and word. What is the word length of an Intel processor? What is meant by the term address space? If a computer has a bit address space what is the address of its last accessible location? The span of memory addresses that the computer can access.
Not all of these will be physical memory. Some many will be empty. How many distinct patterns of 8 bits are there? Perform the following calculations in binary twos-complement: Convert the following decimal numbers into: Therefore 2s-comp is the most frequently used.
Each digit of a number is encoded as a 4-bit binary number. Easy to translate between BCD and decimal e. How can these be overcome? ROM is used for start up code, etc. Cathode Ray Tube like TV: Each of the following values might be used to specify a particular part of a PC.
The cycle of fetching instructions from the computer's memory into the CPU to be executed. Address of next instruction to be fetched is stored in a register called the program counter. This is incremented after each instruction is fetched.