From: Toni Wilen <twilen@winuae.net>
Date: Sat, 1 Apr 2023 14:05:50 +0000 (+0300)
Subject: CIA TOD clock sync fix
X-Git-Tag: 5.0.0~92
X-Git-Url: https://git.unchartedbackwaters.co.uk/w/?a=commitdiff_plain;h=0feec6ab6ef3670d4e2b503154022f11c86b8902;p=francis%2Fwinuae.git

CIA TOD clock sync fix
---

diff --git a/cia.cpp b/cia.cpp
index c5c74e3d..8bcec386 100644
--- a/cia.cpp
+++ b/cia.cpp
@@ -814,12 +814,12 @@ static bool cia_checkalarm(bool inc, bool irq, int num)
 {
 	struct CIA *c = &cia[num];
 
+#if 0
 	// hack: do not trigger alarm interrupt if KS code and both
 	// tod and alarm == 0. This incorrectly triggers on non-cycle exact
 	// modes. Real hardware value written to ciabtod by KS is always
 	// at least 1 or larger due to bus cycle delays when reading
 	// old value.
-#if 0
 	if (num) {
 		if (!currprefs.cpu_compatible && (munge24(m68k_getpc()) & 0xFFF80000) != 0xF80000) {
 			if (c->tod == 0 && c->alarm == 0)
@@ -935,7 +935,7 @@ static void do_tod_hack(bool dotod)
 		cia[0].tod++;
 		cia[0].tod &= 0x00ffffff;
 		tod_hack_tod_last = cia[0].tod;
-		cia_checkalarm(false, false, 0);
+		cia_checkalarm(false, true, 0);
 	}
 }