v65c816-big: fix bug in devtty introduced in peek conversion

diff --git a/Kernel/platform-v65c816-big/devtty.c b/Kernel/platform-v65c816-big/devtty.c
index 6dbbb00..6117fdf 100644 (file)
--- a/Kernel/platform-v65c816-big/devtty.c
+++ b/Kernel/platform-v65c816-big/devtty.c
@@ -57,7 +57,7 @@ void tty_poll(void)
 {
         uint8_t x;
         
-        x = peek(0x21);
+        x = peek(0x21) & 1 ;
         if (x) {
                x = peek(0x20);
                tty_inproc(1, x);