From 2c13432aeb4749af3988d6cdc973f92a4fdc5522 Mon Sep 17 00:00:00 2001
From: minjaesong <alswo9628@gmail.com>
Date: Fri, 24 Dec 2021 14:31:10 +0900
Subject: [PATCH] print: emit replacement character for unknown codepoint

---
 assets/disk0/tvdos/TVDOS.SYS | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/assets/disk0/tvdos/TVDOS.SYS b/assets/disk0/tvdos/TVDOS.SYS
index 83369ea..dc5d54e 100644
--- a/assets/disk0/tvdos/TVDOS.SYS
+++ b/assets/disk0/tvdos/TVDOS.SYS
@@ -332,7 +332,11 @@ print = function(str) {
         let cp = unicode.utf8toCodepoints(str)
         let q = unicode.getUniprint(cp[0])
         cp.forEach(c => {
-            if (q[0](c)) {
+            if (q == undefined) {
+                con.addch(4)
+                con.curs_right()
+            }
+            else if (q[0](c)) {
                 q[1](c)
             }
             else {