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Code: Select all

for (;;) {
	void writechar(void) {
		int x = 0;
		int y = 10;
		for (;;) {
			if (inb_kbr(0x20) != 0x00) {
				x++;
				if (inb_kbr(0x60) & 0x80) {
					// You can see this one if the user pressed the shift, alt and ctrl/control keys.
				} else {
					terminal_writechar(keyboard_byte[inb_kbr(0x60)], WHITE, BLACK, x, y); // Write our character.
					outb_kbr(0x20, 0x20);
				}
			}
		}
	}
	for (;;) { writechar(); }
}

Code: Select all

#include "../defs.h"

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

unsigned char inb_kbr(uint16_t port) {
	uint8_t ret;
	__asm__ volatile ("inb %1, %0" : "=a"(ret) : "Nd"(port) );
	return ret;
}

void outb_kbr(uint16_t port, uint8_t val) {
	__asm__ volatile ( "outb %0, %1" : : "a"(val), "Nd"(port) );
}


void keyboard_handler(void) {
	unsigned char scancode = inb_kbr(0x60);
	unsigned char irq = inb_kbr(0x20);
	int x = 0;
	for (;;) {
		if (irq != 0x00) {
			if (scancode & 0x80) {
					/* Here we have released a key. You can see this one
					to see if the user released the alt, control or 
					shift keys. */
			}
			if (scancode != 0x00 && scancode != 0x80) {
					x++; // Increment x.
					terminal_writechar(keyboard_byte[scancode], WHITE, BLACK, x, 10); // Write!
			}
			outb_kbr(0x20, 0x20); // Send an EOI to IRQ1.
		}
	}
}