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mariarad [96]
2 years ago
13

On a typical microprocessor, a distinct I/O address is used to refer to the I/O data registers and a distinct address for the co

ntrol and status registers in an I/O controller for a given device. Such registers are referred to as ports. In the Intel 8088, two I/O instruction formats are used. In one format, the 8-bit opcode specifies an I/O operation; this is followed by an 8-bit port address. Other I/O opcodes imply that the port address is in the 16-bit DX register. How many ports can the 8088 address in each I/O addressing mode?
Computers and Technology
1 answer:
levacccp [35]2 years ago
5 0

Answer:

First I/O instruction format -> 256 ports

Second I/O instruction format -> 65536 ports

Explanation:

  • For the first instruction format, we have eight bits for port addressing, therefore, the number of port addressed can be calculated as 2^8 = 256 ports
  • For the second instruction format, we have sixteen bits for addressing, therefore, the number of ports addressed can be calculated as 2^16 = 65536 ports

The opcode selection allows us to change between the first and second instruction format, an opcode allows one input or output operation at a time.

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Write a program that uses the function isPalindrome given in Example 6-6 (Palindrome). Test your program on the following string
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Answer:

#include <bits/stdc++.h>

using namespace std;

bool isPalindrome(string str)

{

   char a,b;

int length = str.length();

for (int i = 0; i < length / 2; i++)

{

   a=tolower(str[i]);//Converting both first characters to lowercase..

   b=tolower(str[length-1-i]);

   if (b != a )

return false;

}

return true;

   

}

int main() {

   string t1;

   cin>>t1;

   if(isPalindrome(t1))

   cout<<"The string is Palindrome"<<endl;

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Output:-

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Enter the string

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Explanation:

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Edhesive 6.5 code practice question 4
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This question is incomplete. The complete question is given below:

Write a program that asks the user to enter ten temperatures and then finds the sum. The input temperatures should allow for decimal values.

Sample Run

Enter Temperature: 27.6

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Enter Temperature: 64.4

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Answer:

# Program in Python

sum = 0.0

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