From ffb2c4adfb8e65e355b39abd39d994eebc649c98 Mon Sep 17 00:00:00 2001
From: Wojtek Kosior <kwojtus@protonmail.com>
Date: Fri, 3 Jan 2020 04:53:01 +0100
Subject: add (not yet fully working - it can only send through uart now)
 interrupt-driven uart together with "scheduler"

---
 PL0_test.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'PL0_test.c')

diff --git a/PL0_test.c b/PL0_test.c
index c6cbe18..fed62a2 100644
--- a/PL0_test.c
+++ b/PL0_test.c
@@ -7,7 +7,9 @@ void PL0_main(void)
   // implemented correctly, this shall get printed
   puts("Hello userspace! Type 'f' if you want me to try accessing "
        "kernel memory!");
-  
+
+
+  asm volatile("mov r0, #17\n\rsvc #0" ::: "r0");
   while (1)
     {
       char c = getchar();
-- 
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