From 38f54875d053e62e3bab991facb8e13cdbc1e258 Mon Sep 17 00:00:00 2001
From: Stefan <stefan.haubenthal@gmail.com>
Date: Sat, 7 Sep 2024 17:06:45 +0200
Subject: [PATCH 1/5] Add files via upload

---
 libsrc/atmos/waitvsync.s | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 libsrc/atmos/waitvsync.s

diff --git a/libsrc/atmos/waitvsync.s b/libsrc/atmos/waitvsync.s
new file mode 100644
index 000000000..6113f3da2
--- /dev/null
+++ b/libsrc/atmos/waitvsync.s
@@ -0,0 +1,18 @@
+;
+; Written by Stefan Haubenthal <polluks@sdf.org>, requires VSync hack
+;
+; void waitvsync (void);
+;
+
+        .export _waitvsync
+
+        .include "atmos.inc"
+
+.proc   _waitvsync
+
+wait:   lda     VIA::PRA2
+        and     #%00010000      ; CB1
+        bne     wait
+        rts
+
+.endproc

From 033fd9e0dcc891c00df01dba611b1fffb5fb5591 Mon Sep 17 00:00:00 2001
From: Stefan <stefan.haubenthal@gmail.com>
Date: Sat, 7 Sep 2024 17:19:21 +0200
Subject: [PATCH 2/5] Update funcref.sgml

---
 doc/funcref.sgml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/doc/funcref.sgml b/doc/funcref.sgml
index 130646538..ea2350aad 100644
--- a/doc/funcref.sgml
+++ b/doc/funcref.sgml
@@ -155,6 +155,7 @@ function.
 <item><ref id="atmos_tick" name="atmos_tick">
 <item><ref id="atmos_tock" name="atmos_tock">
 <item><ref id="atmos_zap" name="atmos_zap">
+<item><ref id="waitvsync" name="waitvsync">
 </itemize>
 
 
@@ -8358,6 +8359,7 @@ only in the presence of a prototype.
 <descrip>
 <tag/Function/Wait until the start of the next video frame.
 <tag/Header/<tt/
+<ref id="atmos.h" name="atmos.h">,
 <ref id="cbm.h" name="cbm.h">,
 <ref id="gamate.h" name="gamate.h">,
 <ref id="nes.h" name="nes.h">,
@@ -8365,6 +8367,7 @@ only in the presence of a prototype.
 <tag/Declaration/<tt/void waitvsync (void);/
 <tag/Description/Wait for vertical sync, to reduce flickering.
 <tag/Availability/Platforms served by the headers above
+(Atmos requires the VSync hack)
 <tag/Example/None.
 </descrip>
 </quote>

From f430341d5d46bd11a006b9fdb731d56c746394c7 Mon Sep 17 00:00:00 2001
From: Stefan <stefan.haubenthal@gmail.com>
Date: Sat, 7 Sep 2024 17:23:17 +0200
Subject: [PATCH 3/5] Update atmos.h

---
 include/atmos.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/atmos.h b/include/atmos.h
index 38d423c46..460a0010f 100644
--- a/include/atmos.h
+++ b/include/atmos.h
@@ -169,6 +169,9 @@ void atmos_tock (void);
 void atmos_zap (void);
 /* Raygun sound effect */
 
+void waitvsync (void);
+/* Wait for start of next frame */
+
 
 
 /* End of atmos.h */

From b355620939a9720da91cb90408439ff90868ab84 Mon Sep 17 00:00:00 2001
From: Stefan <stefan.haubenthal@gmail.com>
Date: Sat, 7 Sep 2024 18:49:53 +0200
Subject: [PATCH 4/5] Optimise waitvsync.s

---
 libsrc/atmos/waitvsync.s | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libsrc/atmos/waitvsync.s b/libsrc/atmos/waitvsync.s
index 6113f3da2..15abe1926 100644
--- a/libsrc/atmos/waitvsync.s
+++ b/libsrc/atmos/waitvsync.s
@@ -10,8 +10,8 @@
 
 .proc   _waitvsync
 
-wait:   lda     VIA::PRA2
-        and     #%00010000      ; CB1
+        lda     #%00010000
+wait:   and     VIA::PRA2       ; CB1
         bne     wait
         rts
 

From be5a9f92ec814868e4eaa432159dc1a6ffe54b2a Mon Sep 17 00:00:00 2001
From: Stefan <stefan.haubenthal@gmail.com>
Date: Sat, 7 Sep 2024 18:51:20 +0200
Subject: [PATCH 5/5] oops

---
 libsrc/atmos/waitvsync.s | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libsrc/atmos/waitvsync.s b/libsrc/atmos/waitvsync.s
index 15abe1926..85e50a795 100644
--- a/libsrc/atmos/waitvsync.s
+++ b/libsrc/atmos/waitvsync.s
@@ -10,8 +10,8 @@
 
 .proc   _waitvsync
 
-        lda     #%00010000
-wait:   and     VIA::PRA2       ; CB1
+        lda     #%00010000      ; CB1
+wait:   and     VIA::PRA2
         bne     wait
         rts