Computer Science: An Overview (13th Edition) (What's New in Computer Science)
13th Edition
ISBN: 9780134875460
Author: Glenn Brookshear, Dennis Brylow
Publisher: PEARSON
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Textbook Question
Chapter 2, Problem 49CRP
Suppose the Vole communicates with a printer using the technique of memory-mapped I/O. Suppose also that address 0xFF is used to send characters to the printer, and address 0xFE is used to receive information about the printer’s status. In particular, suppose the least significant bit at the address 0xFE indicates whether the printer is ready to receive another character (with a 0 indicating “not ready” and a 1 indicating “ready”). Starting at address 0x00, write a machine language routine that waits until the printer is ready for another character and then sends the character represented by the bit pattern in register 0x5 to the printer.
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Suppose a computer system uses 16-bit addresses for both its virtual and physical addresses. In addition, assume each page (and frame) has size 256 bytes. 8 bits are used for offset, 8 bits are used for page # and the max number of pages a process can have is 256.
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f) Now, suppose that the OS uses a two-level page table. Draw the page table. (Assume that frames 7 through 221 are free, so you can allocate space for the page table there.) In addition, suppose that the page-table directory storage comprises a whole number of consecutive full frames. (For examples: if the directory entry is 2 bytes, the entry’s storage comprises 1 frame; if the directory entry is 260 bytes, the entry’s storage comprises 2 consecutive frames.)
g)What is the size of the two-level page table…
Suppose we have a byte-addressable computer using direct mapping with 16-bit main memory addresses and 32 blocks of cache. If each block contains 16 bytes.
a. Determine the number of bits of the offset field.
b. Determine the number of bits of the block (or slot) field.
c. Determine the number of bits of the tag field.
d. To which cache block would the hexadecimal address 0x2468 map?
e. What is the tag of the hexadecimal address 0x2468
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Unlike a byte that is always 8 bits, word size can vary from machine to machine. Let's say we have a 16-bit system (word size is 2 bytes) and a memory unit that has 10 address lines.
Because there are 10 address bits, we can have 210 unique addresses, hence 1024 addresses. If we are working with something word-addressable, that means each word has a unique address, and we canstore 1024 words. The memory size is 1 kiloword, or equivalently, 2kilobytes because each word is 2 bytes long. The address of the first word is 0, the second word is 1, the third word is 2, and the last word is 1023.Now, with 4 address lines and a word size of 4 bits, what is the address of the last word?
Chapter 2 Solutions
Computer Science: An Overview (13th Edition) (What's New in Computer Science)
Ch. 2.1 - What sequence of events do you think would be...Ch. 2.1 - What information must the CPU supply to the main...Ch. 2.1 - Prob. 3QECh. 2.2 - Prob. 1QECh. 2.2 - In the text, JUMP instructions were expressed by...Ch. 2.2 - Is the instruction If 0 equals 0, then jump to...Ch. 2.2 - Write the example program in Figure 2.7 in actual...Ch. 2.2 - The following are instructions written in Vole...Ch. 2.2 - What is the difference between the instructions...Ch. 2.2 - Here are some instructions in English. Translate...
Ch. 2.3 - Prob. 1QECh. 2.3 - Suppose the Vole memory cells at addresses 0xB0 to...Ch. 2.3 - Suppose the Vole memory cells at addresses 0xA4 to...Ch. 2.3 - Suppose the Vole memory cells at addresses 0xF0 to...Ch. 2.4 - Prob. 1QECh. 2.4 - Prob. 2QECh. 2.4 - Prob. 3QECh. 2.4 - a. Suppose you XOR the first 2 bits of a string of...Ch. 2.4 - Prob. 5QECh. 2.4 - Prob. 6QECh. 2.4 - Prob. 7QECh. 2.4 - Prob. 8QECh. 2.4 - Prob. 9QECh. 2.4 - Prob. 10QECh. 2.4 - Using Vole machine language (Appendix C), write a...Ch. 2.4 - Prob. 12QECh. 2.5 - Prob. 1QECh. 2.5 - Prob. 2QECh. 2.5 - Prob. 3QECh. 2.6 - The hypotenuse example script truncates the sides...Ch. 2.6 - Prob. 2QECh. 2.6 - The Python built-in function str () will convert a...Ch. 2.6 - Use the Python built-in bin () to write a script...Ch. 2.6 - Prob. 6QECh. 2.7 - Referring back to Questions 3 of Section 2.3, if...Ch. 2.7 - Prob. 2QECh. 2.7 - Suppose there were two central processing units...Ch. 2 - a. In what way are general-purpose registers and...Ch. 2 - Answer the following questions in Vole machine...Ch. 2 - Prob. 3CRPCh. 2 - What is the value of the program counter in the...Ch. 2 - Prob. 5CRPCh. 2 - Prob. 6CRPCh. 2 - Prob. 7CRPCh. 2 - Suppose a machine language is designed with an...Ch. 2 - Translate the following instructions from English...Ch. 2 - Rewrite the program in Figure 2.7 assuming that...Ch. 2 - Classify each of the following Vole instructions...Ch. 2 - Prob. 12CRPCh. 2 - Prob. 13CRPCh. 2 - Suppose the memory cells at addresses 0x00 through...Ch. 2 - Suppose the memory cells at addresses 0x00 through...Ch. 2 - Suppose the memory cells at addresses 0x00 through...Ch. 2 - Suppose the memory cells at addresses 0x00 through...Ch. 2 - Prob. 18CRPCh. 2 - If the Vole executes an instruction every...Ch. 2 - Prob. 20CRPCh. 2 - Prob. 21CRPCh. 2 - Prob. 22CRPCh. 2 - Prob. 23CRPCh. 2 - Write a program in Vole to compute the sum of...Ch. 2 - Prob. 26CRPCh. 2 - Prob. 27CRPCh. 2 - Suppose the following program, written in Vole, is...Ch. 2 - Summarize the steps involved when the Vole...Ch. 2 - Summarize the steps involved when the Vole...Ch. 2 - Summarize the steps involved when the Vole...Ch. 2 - Suppose the registers 0x4 and 0x5 in the Vole...Ch. 2 - Prob. 33CRPCh. 2 - Prob. 34CRPCh. 2 - Prob. 35CRPCh. 2 - Prob. 36CRPCh. 2 - Prob. 37CRPCh. 2 - Prob. 38CRPCh. 2 - Prob. 39CRPCh. 2 - Prob. 40CRPCh. 2 - Prob. 41CRPCh. 2 - Prob. 42CRPCh. 2 - a. What single instruction in the Vole machine...Ch. 2 - Write a Vole program that reverses the contents of...Ch. 2 - Write a Vole program that subtracts the value...Ch. 2 - Prob. 46CRPCh. 2 - Suppose a person is typing forty words per minute...Ch. 2 - Prob. 48CRPCh. 2 - Suppose the Vole communicates with a printer using...Ch. 2 - Write a Vole program that places 0s in all the...Ch. 2 - Prob. 51CRPCh. 2 - Prob. 52CRPCh. 2 - Suppose you are given 32 processors, each capable...Ch. 2 - Prob. 54CRPCh. 2 - Prob. 55CRPCh. 2 - Describe how the average of a collection of...Ch. 2 - Write and test a Python script that reads in a...Ch. 2 - Write and test a Python script that reads in a...Ch. 2 - Prob. 59CRPCh. 2 - Suppose a computer manufacturer develops a new...Ch. 2 - Prob. 2SICh. 2 - Prob. 3SICh. 2 - Prob. 4SICh. 2 - Suppose a manufacturer produces a computer chip...Ch. 2 - Prob. 6SICh. 2 - Prob. 7SICh. 2 - Prob. 8SI
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