Add keyboard driver.

drivers/keyboard.c

@@ -0,0 +1,24 @@
+#include "keyboard.h"
+#include "../cpu/isr.h"
+#include "../console.h"
+#include "port.h"
+
+static const char sc_ascii[] = {
+    '?', '?', '1', '2', '3', '4', '5', '6',
+    '7', '8', '9', '0', '-', '=', '?', '?', 'Q', 'W', 'E', 'R', 'T', 'Y',
+    'U', 'I', 'O', 'P', '[', ']', '?', '?', 'A', 'S', 'D', 'F', 'G',
+    'H', 'J', 'K', 'L', ';', '\'', '`', '?', '\\', 'Z', 'X', 'C', 'V',
+    'B', 'N', 'M', ',', '.', '/', '?', '?', '?', ' ',
+};
+
+static void interrupt_handler(registers_t *r) {
+    uint8_t scancode = port_byte_in(0x60);
+    if (scancode < sizeof(sc_ascii)) {
+        char string[] = {sc_ascii[scancode], '\0'};
+        printk(string);
+    }
+}
+
+void init_keyboard() {
+    register_interrupt_handler(IRQ1, interrupt_handler);
+}

drivers/keyboard.h

@@ -0,0 +1,3 @@
+#pragma once
+
+void init_keyboard();