From: Toni Wilen <twilen@winuae.net>
Date: Sat, 1 Oct 2022 16:48:26 +0000 (+0300)
Subject: Only set DSKSYNC interrupt if it wasn't already set.
X-Git-Tag: 41000~132
X-Git-Url: https://git.unchartedbackwaters.co.uk/w/?a=commitdiff_plain;h=e490ea5cfb9358fc7532b10eb7031407eca375ea;p=francis%2Fwinuae.git

Only set DSKSYNC interrupt if it wasn't already set.
---

diff --git a/disk.cpp b/disk.cpp
index 8cf0caf3..682d952e 100644
--- a/disk.cpp
+++ b/disk.cpp
@@ -4056,6 +4056,7 @@ static void wordsync_detected(bool startup)
 
 static void disk_doupdate_read_reallynothing(int floppybits, bool state)
 {
+	bool done = false;
 	// Only because there is at least one demo that checks wrong bit
 	// and hangs unless DSKSYNC bit it set with zero DSKSYNC value...
 	if (INTREQR() & 0x1000)
@@ -4079,8 +4080,9 @@ static void disk_doupdate_read_reallynothing(int floppybits, bool state)
 			dskbytr_val = word & 0xff;
 			dskbytr_val |= 0x8000;
 		}
-		if (!(adkcon & 0x200) && word == dsksync) {
+		if (!done && !(adkcon & 0x200) && word == dsksync) {
 			INTREQ(0x8000 | 0x1000);
+			done = true;
 		}
 		bitoffset++;
 		bitoffset &= 15;