Inverted text function

IOX/conio.c

@@ -5,6 +5,13 @@
 
 int conid = 0x01;
 
+char * strinv(char str[]) {
+	for(i = 0; i < strlen(str); i++){
+		str[i] = inv(str[i]);
+	}
+	return str;
+}
+
 void conprint(char str[], int x, int y, int mode){
 	con = (Console*)redbus;
 	rb_map_device(conid);

IOX/conio.h

@@ -2,4 +2,5 @@ int i;
 int line;
 int str_size;
 Console* con;
+char * strinv(char str[]);
 void conprint(char str[], int x, int y, int mode);

IOX/test_iox.c

@@ -10,6 +10,7 @@
 #define redbus 0x0300
 #define IOXID 0x03
 
+
 Iox* expand;
 int* output;
 
@@ -20,5 +21,5 @@ void main() {
 	rb_map_device(IOXID);
 	expand->out = 0;
 	output = (int*)expand->in;
-	conprint("very Nice", 40, 25, 3); 
+	conprint(strinv("Huzzah, inverted text!"), 0, 0, 3);
 }