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Write a main program that uses these system calls to echo the typed characters. The pseudo code will look something like:
void traphandler () {
if (R0 == 0) { // read system call
R1 = getchar(); // poll the status register of the IO terminal until a char is available then load it into R1
} else if (R0 == 1) { // write system call
putchar(R1); // just store R1 to memory location 0xfff0
}
enableInterrupts();
void main() {
char c;
while (1) {
c = read(); // set R0 to 0 can issue the 'trap' instruction, result will be in R1
write(c); // set R0 to 1 and set R1 to 'c' and issue the 'trap' instruction
Given a bool variable isReadable write some statements that assign true to isReadable if the file "topsecret" exists and can be read by the program and assigns false to isR
What's a six-letter word that has an e as its first, third, and fifth letter? Can you find an anagram of pine grave. Or how about a word that starts and ends with ant (other than a
Project Description: I would like to be building regarding a complex mobile application build as we require the signing of an NDA. My firm in based in Montreal Canada and we are
Create an array of Strings and fill it with some interesting text, such as vacation destinations, album names, or weapon names from a CRPG. Display three elements of the array on t
Smugglers are becoming very smart day by day. Now they have developed a new technique of sending their messages from one smuggler to another. In their new technology, they are send
Aim: To implement a program to swap two numbers using reference arguments. Code: void swap(int *a, int *b) { int temp; temp=*a;
minimum shelf
write a program in c/C++ using nested if statement for calculating the average marks and grades of 5 subjects
difference
Pointer to function: int mul(int a, int b, int c) { return a*b*c; } void main() { int (*function_pointer)(int, int, int); function_pointer = &mul;
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