From 0c78f33b432e1a5fbc34d1948b75d3a6cd229799 Mon Sep 17 00:00:00 2001
From: Sam Colwell <scolwell@nfatech.com>
Date: Sat, 9 Feb 2019 13:04:30 -0500
Subject: [PATCH] Trying new method to get unbuffered stdin

---
 py65/monitor.py       | 27 ++++++++++++++++++++++++++-
 py65/utils/console.py |  4 ++--
 2 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/py65/monitor.py b/py65/monitor.py
index 57319b7..b9ea6d2 100644
--- a/py65/monitor.py
+++ b/py65/monitor.py
@@ -53,7 +53,32 @@ class Monitor(cmd.Cmd):
         self._width = 78
         self.prompt = "."
         self._add_shortcuts()
-        cmd.Cmd.__init__(self, stdin=stdin, stdout=stdout)
+
+        # Attempt to get a copy of stdin that is unbuffered.
+        # This allows for immediate response to typed input as well as
+        # pasted input.  If unable to get an unbuffered version of
+        # stdin, use the original version.
+        if stdin != None:
+            try:
+                # Reopen stdin with no buffer.
+                self.unbuffered_stdin = os.fdopen(stdin.fileno(), 'rb', 0)
+            except Exception as e:
+                print(e)
+                # Unable to reopen this file handle with no buffer.
+                # Just use the original file handle.
+                print("Error opening unbuffered stdin - using buffered version")
+                self.unbuffered_stdin = stdin
+        else:
+            # If stdin is None, try using sys.stdin for input.
+            try:
+                # Reopen the system's stdin with no buffer.
+                self.unbuffered_stdin = os.fdopen(sys.stdin.fileno(), 'rb', 0)
+            except Exception as e:
+                print(e)
+                print("Error opening default unbuffered stdin - using buffered version")
+                self.unbuffered_stdin = None
+
+        cmd.Cmd.__init__(self, stdin=self.unbuffered_stdin, stdout=stdout)
 
         # Save the current input mode so it can be restored after
         # after processing commands and before exiting.
diff --git a/py65/utils/console.py b/py65/utils/console.py
index c44e0a8..de39da2 100644
--- a/py65/utils/console.py
+++ b/py65/utils/console.py
@@ -80,9 +80,9 @@ else:
             newattr = currentattr[:]
             newattr[3] &= ~termios.ICANON & ~termios.ECHO
 
-            # Switch to non-blocking reads with 0.1 second timeout.
+            # Switch to non-blocking reads with no timeout.
             newattr[6][termios.VMIN] = 0
-            newattr[6][termios.VTIME] = 1
+            newattr[6][termios.VTIME] = 0
             termios.tcsetattr(fd, termios.TCSANOW, newattr)
         except:
             # Quietly ignore termios errors, such as stdin not being