ED: Gotten l (list) working, need to work more on d (delete) as there's a bug with deleting lines that are not line 1.

source/kernel/features/strings.asm

@@ -106,39 +106,42 @@ string_join:
 		ret
 
 ; ------------------------------------------------------------------------
-; TODO
 ; Converts a string to an integer
 ; IN: SI = string location (max 5 chars, up to '65536')
-; OUT: AX = number
+; OUT: AX = number, DX = length of int string
 string_cast_to_int:
-	pusha
+	push cx
+	push bx
+	push dx
 	xor cx,cx
 	.loop:
 		xor ax,ax
 		lodsb
 
-		cmp al, 30h
+		; Exit if the character is not a number
+		cmp al,'0'
 		jl .finish
-		cmp al, 39h
+		cmp al,'9'
 		jg .finish
-
-		sub al, 30h
+		
+		sub al, '0'
 		mov bx, ax
+
 		mov ax, 10
 		mul cx ; Multiple the current value by 10
 		add ax, bx ; Then add the new digit
 		mov cx, ax
 		jmp .loop
 	.finish:
-		mov [int_tmp], cx
-		popa
-		mov ax, [int_tmp]
+		mov ax,cx
+		pop dx
+		pop bx
+		pop cx
 		ret
 
 ; ------------------------------------------------------------------------
 ; IN:  AX = integer (unsigned)
 ; OUT: AX -> null-terminated string
-
 string_cast_from_int:
 	pusha
 	cld ; Write backwards