trs80: static tty buffers

diff --git a/Kernel/platform-trs80/devtty.c b/Kernel/platform-trs80/devtty.c
index 6eb6af0..f7a7c51 100644 (file)
--- a/Kernel/platform-trs80/devtty.c
+++ b/Kernel/platform-trs80/devtty.c
@@ -9,9 +9,9 @@
 #include <devinput.h>
 #include <stdarg.h>
 
-char tbuf1[TTYSIZ];
-char tbuf2[TTYSIZ];
-char tbuf3[TTYSIZ];
+static char tbuf1[TTYSIZ];
+static char tbuf2[TTYSIZ];
+static char tbuf3[TTYSIZ];
 
 uint8_t curtty;                /* output side */
 uint8_t inputtty;      /* input side */