Use IRQ 1 to get information from the keyboard instead of polling

src/interrupts.asm

@@ -205,6 +205,13 @@ install_irqs:
 
     ret
 
+; r8 = irq
+; r9 = handler address
+register_irq_handler:
+    mov [irq_handlers + r8 * 8], r9
+
+    ret
+
 ; Data structures
 
 ; each idt entry is form like that:

src/kernel.asm

@@ -100,6 +100,8 @@ lm_start:
     ; Enter the shell
     call shell_start
 
+    jmp $
+
 ; Includes
 
 %include "src/utils/macros.asm"

src/shell.asm

@@ -15,8 +15,18 @@ shell_start:
     mov r9, command_line_length
     call print_normal
 
-    .start_waiting:
-        call key_wait
+    mov r8, 1
+    mov r9, key_entered
+    call register_irq_handler
+
+    ret
+
+key_entered:
+    in al, 0x60
+    mov dl, al
+    and dl, 10000000b
+
+    jnz .end_handler
 
     ; ENTER key
     cmp al, 28
@@ -39,8 +49,7 @@ shell_start:
     inc r13
     mov [current_column], r13
 
-        ; Wait for the next key again
-        jmp .start_waiting
+    jmp .end_handler
 
     .new_command:
         call goto_next_line
@@ -133,7 +142,9 @@ shell_start:
             mov r9, command_line_length
             call print_normal
 
-            jmp .start_waiting
+    .end_handler:
+
+    ret
 
 ; Variables