I am currently working on my OS. I've started building it since a-day before yesterday. My OS is command-based.
This is my Kernel.c(The main file):
#include "include/screen.h"
#include "include/kb.h"
#include "include/string.h"
#include "data/userdata.c"
kmain()
{
clearScreen();
print("Halcyon OS 1.05 Beta ");
while (1)
{
print("\nhalcyon@halcyon ~\n$ ");
string ch = readStr();
if(strEql(ch,"cmd")!=0)
{
print("\nYou are already in cmd\n");
}
else if(strEql(ch,"clear")!=0)
{
clearScreen();
}
else if(strEql(ch,"help")!=0)
{
print("Halcyon help.");
}
else if(strEql(ch,"")!=0)
{
continue;
}
else
{
print("\nNo command found:");print(ch);
break;
}
}// end while loop!
}
And here is kb.h (I've made it for keyboard support.):
#ifndef KB_H
#define KB_H
#include "screen.h"
#include "system.h"
#include "types.h"
string readStr()
{
char buff;
string buffstr;
uint8 i = 0;
uint8 reading = 1;
while(reading)
{
if(inportb(0x64) & 0x1)
{
switch(inportb(0x60))
{
/*case 1:
printch('(char)27); Escape button
buffstr[i] = (char)27;
i++;
break;*/
case 2:
printch('1');
buffstr[i] = '1';
i++;
break;
case 3:
printch('2');
buffstr[i] = '2';
i++;
break;
case 4:
printch('3');
buffstr[i] = '3';
i++;
break;
case 5:
printch('4');
buffstr[i] = '4';
i++;
break;
case 6:
printch('5');
buffstr[i] = '5';
i++;
break;
case 7:
printch('6');
buffstr[i] = '6';
i++;
break;
case 8:
printch('7');
buffstr[i] = '7';
i++;
break;
case 9:
printch('8');
buffstr[i] = '8';
i++;
break;
case 10:
printch('9');
buffstr[i] = '9';
i++;
break;
case 11:
printch('0');
buffstr[i] = '0';
i++;
break;
case 12:
printch('-');
buffstr[i] = '-';
i++;
break;
case 13:
printch('=');
buffstr[i] = '=';
i++;
break;
case 14:
printch('\b');
i--;
buffstr[i] = 0;
break;
/* case 15:
printch('\t'); Tab button
buffstr[i] = '\t';
i++;
break;*/
case 16:
printch('q');
buffstr[i] = 'q';
i++;
break;
case 17:
printch('w');
buffstr[i] = 'w';
i++;
break;
case 18:
printch('e');
buffstr[i] = 'e';
i++;
break;
case 19:
printch('r');
buffstr[i] = 'r';
i++;
break;
case 20:
printch('t');
buffstr[i] = 't';
i++;
break;
case 21:
printch('y');
buffstr[i] = 'y';
i++;
break;
case 22:
printch('u');
buffstr[i] = 'u';
i++;
break;
case 23:
printch('i');
buffstr[i] = 'i';
i++;
break;
case 24:
printch('o');
buffstr[i] = 'o';
i++;
break;
case 25:
printch('p');
buffstr[i] = 'p';
i++;
break;
case 26:
printch('[');
buffstr[i] = '[';
i++;
break;
case 27:
printch(']');
buffstr[i] = ']';
i++;
break;
case 28:
// printch('\n');
// buffstr[i] = '\n';
i++;
reading = 0;
break;
/* case 29:
printch('q'); Left Control
buffstr[i] = 'q';
i++;
break;*/
case 30:
printch('a');
buffstr[i] = 'a';
i++;
break;
case 31:
printch('s');
buffstr[i] = 's';
i++;
break;
case 32:
printch('d');
buffstr[i] = 'd';
i++;
break;
case 33:
printch('f');
buffstr[i] = 'f';
i++;
break;
case 34:
printch('g');
buffstr[i] = 'g';
i++;
break;
case 35:
printch('h');
buffstr[i] = 'h';
i++;
break;
case 36:
printch('j');
buffstr[i] = 'j';
i++;
break;
case 37:
printch('k');
buffstr[i] = 'k';
i++;
break;
case 38:
printch('l');
buffstr[i] = 'l';
i++;
break;
case 39:
printch(';');
buffstr[i] = ';';
i++;
break;
case 40:
printch((char)44); // Single quote (')
buffstr[i] = (char)44;
i++;
break;
case 41:
printch((char)44); // Back tick (`)
buffstr[i] = (char)44;
i++;
break;
/* case 42: Left shift
printch('q');
buffstr[i] = 'q';
i++;
break;
case 43: \ (< for somekeyboards)
printch((char)92);
buffstr[i] = 'q';
i++;
break;*/
case 44:
printch('z');
buffstr[i] = 'z';
i++;
break;
case 45:
printch('x');
buffstr[i] = 'x';
i++;
break;
case 46:
printch('c');
buffstr[i] = 'c';
i++;
break;
case 47:
printch('v');
buffstr[i] = 'v';
i++;
break;
case 48:
printch('b');
buffstr[i] = 'b';
i++;
break;
case 49:
printch('n');
buffstr[i] = 'n';
i++;
break;
case 50:
printch('m');
buffstr[i] = 'm';
i++;
break;
case 51:
printch(',');
buffstr[i] = ',';
i++;
break;
case 52:
printch('.');
buffstr[i] = '.';
i++;
break;
case 53:
printch('/');
buffstr[i] = '/';
i++;
break;
case 54:
printch('.');
buffstr[i] = '.';
i++;
break;
case 55:
printch('/');
buffstr[i] = '/';
i++;
break;
/*case 56:
printch(' '); Right shift
buffstr[i] = ' ';
i++;
break;*/
case 57:
printch(' ');
buffstr[i] = ' ';
i++;
break;
}
}
}
buffstr[i] = 0;
return buffstr;
}
#endif
And at last the string.h(This has function to compare two strings.):
#ifndef STRING_H
#define STRING_H
#include "types.h"
uint16 strlength(string ch)
{
uint16 i = 1;
while(ch[i++]);
return --i;
}
uint8 strEql(string ch1,string ch2)
{
uint8 result = 1;
uint8 size = strlength(ch1);
if(size != strlength(ch2)) result =0;
else
{
uint8 i = 0;
for(i;i<=size;i++)
{
if(ch1[i] != ch2[i]) result = 0;
}
}
return result;
}
#endif
But the problem is that even if enter the correct command like 'cmd', it says 'No command found: cm'. It should say: 'You're already in cmd!'
Also, it is recognizing it as 'cm' not 'cmd'.
And if I write in kernel.c: "print("Hello");" then it will print: 'Hell' not 'Hello'! It misses the last character.
I don't know what's wrong with my program. I use gcc to compile it, platform is Linux Ubuntu.
Please help! Any help will be greatly appreciated.
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