Register

Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 14 (Page No. 430)

1,638 views
0 votes
0 votes

In which of the four I/O software layers is each of the following done.

  1. Computing the track, sector, and head for a disk read.
  2. Writing commands to the device registers.
  3. Checking to see if the user is permitted to use the device.
  4. Converting binary integers to ASCII for printing.
User Avatar

1 Answer

0 votes
0 votes

Answer:

I/O Software Layers Functions
Functions I/O Software Layers
Computing the track, sector, and head for a disk read Device Driver Layer
Writing commands to the device registers Device Driver Layer
Checking to see if the user is permitted to use the device Operating System Layer
Converting binary integers to ASCII for printing User-Level Software Layer

 

User Avatar
Voting & Accepting an answer helps improve the community
← PreviousNext →
← Previous in categoryNext in category →

Related questions

0 votes
0 votes
1 answer
2
admin asked Oct 28, 2019
604 views
Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 40 (Page No. 433)
Many versions of UNIX use an unsigned $32$-bit integer to keep track of the time as the number of seconds since the origin of time. When will these systems wrap around (year and month)? Do you expect this to actually happen?
Many versions of UNIX use an unsigned $32$-bit integer to keep track of the time as the number of seconds since the origin of time. When will these systems wrap around (y...
User Avatar
0 votes
0 votes
1 answer
4
admin asked Oct 28, 2019
2,028 views
Andrew S. Tanenbaum (OS) Edition 4 Exercise 5 Question 38 (Page No. 432)
A computer uses a programmable clock in square-wave mode. If a $500\:MHz$ crystal is used, what should be the value of the holding register to achieve a clock resolution of a millisecond (a clock tick once every millisecond)? $100$ microseconds?
A computer uses a programmable clock in square-wave mode. If a $500\:MHz$ crystal is used, what should be the value of the holding register to achieve a clock resolution ...
User Avatar
Link Copied!