From 8ca4fcbbf9896ae1afa1ec397d17a6a23081bdc0 Mon Sep 17 00:00:00 2001
From: hap <happppp@users.noreply.github.com>
Date: Sun, 30 Mar 2025 12:36:21 +0200
Subject: [PATCH] ioport: fix possible issue where 4way joystick value could be
 invalid

---
 src/emu/ioport.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/emu/ioport.cpp b/src/emu/ioport.cpp
index 33f556e597f..712df85db29 100644
--- a/src/emu/ioport.cpp
+++ b/src/emu/ioport.cpp
@@ -619,6 +619,8 @@ void digital_joystick::frame_update()
 			m_current4way &= ~(UP_BIT | DOWN_BIT);
 		}
 	}
+	else
+		m_current4way &= m_current;
 }