can compare strings and output help text when user types HELP

source/features/strings.asm

@@ -7,7 +7,7 @@
 ;                    ^
 ;                   SI => lodsb loads value stored at SI to AX and then increments SI if DF is 0
 os_compare_strings:	
-	pusha
+	cld
 
 .compare:
 	lodsb
@@ -19,10 +19,8 @@ os_compare_strings:
 
 .unequal:
 	mov cl, 0		; Change to 0 if unquality is proven
-	popa
 	ret
 
 .equal:
 	mov cl, 1
-	popa
 	ret