diff --git a/user/app1/appl.cc b/user/app1/appl.cc
index f187977..7ca88cb 100644
--- a/user/app1/appl.cc
+++ b/user/app1/appl.cc
@@ -46,33 +46,41 @@ extern "C" void main() {
 	//sys_test(1,2,3,4,5);
 
 	unsigned id = sys_getpid();
-	char text[] = "appX                                                ";
+	char text[] = "appX";
 	text[3] = 0x30+id;
 
 	write(1, text, sizeof(text), 0, (int)id);
 
 	uint8_t cnt = 0;
-	for (unsigned i = 1;; ++i) {
-		if(i%10 == 0){
-			if(id == 2){
-				send(4, text, strlen(text), text, 15);
-				write(1, text, strlen(text), 25, (int)id);
-			}
-			if(id == 4){
-				char blubb[10];
-				if(receive(blubb, 20)){
-				write(1, blubb, strlen(blubb), 25, (int)id);
-				}
-				reply("toast      ", 11);
-			}
-		}
-
+	for (uint8_t i = 1;; ++i) {
 		//counter to see app running
 		cnt=(cnt+1)%100;
-		char buf[12];
+		char buf[32];
 		char* msg = itoa(cnt,buf);
 		write(1, msg, strlen(msg), 6, (int)id);
 
+		//test ipc
+		if((i+50)%100 == 0){
+			if(id == 2){
+				char txt[] = "toastbrot    ";
+				itoa(cnt, &txt[1]);
+				write(2, "send\n", 5);
+				send(4, txt, strlen(txt), txt, 15);
+				write(1, txt, strlen(txt), 25, (int)id);
+			}
+		}
+		if(i%100 == 0){
+			if(id == 4){
+				char blubb[20];
+				if(receive(blubb, sizeof(blubb))){
+					write(1, blubb, strlen(blubb), 25, (int)id);
+					write(2, "reply\n", 6);
+					itoa(cnt, &blubb[1]);
+					reply(blubb, sizeof(blubb));
+				}
+			}
+		}
+
 		// test map/unmap and print ptr
 		void* ptr= map(4096);
 		uint16_t* val = ((uint16_t*)ptr);