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SuperGabry64 wrote:The fact is that using itoa it returns the right ascii code...

SuperGabry64 wrote:...printing the char or directly printing an int (i tried printing 49, the 1 ascii code ) will give a different character

SuperGabry64 wrote:

Code: Select all

         input = inb(0x60);
         input = keyconv(input);
         printf("%s", input);
         printf("    ");

         input = inb(0x60);
         input = keyconv(input);
         printf("%c", input);
         printf("    ");

foliagecanine wrote:

Code: Select all

char kbdus[] = {
	0, 0, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', 0,
	'\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']',
	'\n', 0, 'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'', '`',
	0, '\\', 'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/', 0,
	'*', 0, ' ', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, '7', '8', '9',
	'-', '4', '5', '6', '+', '1', '2', '3', '0', '.'
};
/code][/quote]

But i have 3 questions:
- How to check if shift or caps lock is pressed?
- Why does \t and \n give two strange characters similar to the degrees sign(°)? Even when printing the first Hello World it doesn't works
- Why after every character there is a space?

SuperGabry64 wrote:- How to check if shift or caps lock is pressed?

SuperGabry64 wrote:- Why does \t and \n give two strange characters similar at the degrees sign(°)? Even when printing the first Hello World it doesn't works

SuperGabry64 wrote:- Why after every character there is a space?

StudlyCaps wrote:

SuperGabry64 wrote:No, i never heard of this

I don't mean to be rude, but how much programming experience do you have? OS development can be very difficult, and you need to know very advanced programming techniques, a lookup table is a quite elementary technique.

Regardless, here is Wikipedia's description of a look up table. https://en.wikipedia.org/wiki/Lookup_table
It should explain the theory.

As for implementation; you get the scancode from your keyboard interface, you use a state machine to keep track of whether the shift key or caps key is down and write something like this to figure out what character to print.

Code: Select all

if(shift_down)
{
    return kbdus_shift[scan_code];
}
else if(caps_enable)
{
    return kbdus_caps[scan_code];
}
else
{
    return kbdus[scan_code];
}

rizxt wrote:The only issue with this is that you don't take into consideration if the user has caps lock on AND is pressing shift at the same time... which should then shift all non-alphabetical keys, and set all alphabetical keys to lowercase.

eekee wrote:Sure, if you're Microsoft. I always had my Linux machines configured to basically logical-OR caps with shift. But what you're talking about is basically logical-XOR caps with shift, so it's probably not any harder. (I haven't looked at the code.)

• no modifier
• Shift
• Caps Lock
• Caps Lock + Shift
• AltGr
• AltGr + Shift
• AltGr + Caps Lock
• AltGr + Caps Lock + Shift