add (not yet fully working - it can only send through uart now) interrupt-driven uart together with "scheduler"

1 files changed, 2 insertions, 0 deletions

diff --git a/io.h b/io.h
index 161728a..dcad76e 100644
--- a/io.h
+++ b/io.h
@@ -13,6 +13,8 @@ void puts(char string[]);
 
 void prints(char string[]);
 
+void error(char string[]);
+
 void printdec(uint32_t number);
 
 void printhex(uint32_t number);