From 7a965efd907455e8a00924f176b678a8de656e1c Mon Sep 17 00:00:00 2001
From: OBattler <oubattler@gmail.com>
Date: Fri, 23 Aug 2024 06:21:27 +0200
Subject: [PATCH] Tandy and CGA: Implement the VSync interrupt, fixes
 Ghostbusters freezing.

---
 src/machine/m_tandy.c | 2 ++
 src/video/vid_cga.c   | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/src/machine/m_tandy.c b/src/machine/m_tandy.c
index d51209123..56982b3bd 100644
--- a/src/machine/m_tandy.c
+++ b/src/machine/m_tandy.c
@@ -27,6 +27,7 @@
 #include <86box/86box.h>
 #include <86box/timer.h>
 #include <86box/io.h>
+#include <86box/pic.h>
 #include <86box/pit.h>
 #include <86box/nmi.h>
 #include <86box/mem.h>
@@ -1215,6 +1216,7 @@ vid_poll(void *priv)
                 vid->dispon    = 0;
                 vid->displine  = 0;
                 vid->vsynctime = 16;
+                picint(1 << 5);
                 if (vid->crtc[7]) {
                     if (vid->mode & 1)
                         x = (vid->crtc[1] << 3) + 16;
diff --git a/src/video/vid_cga.c b/src/video/vid_cga.c
index 2ea07c346..8306edd56 100644
--- a/src/video/vid_cga.c
+++ b/src/video/vid_cga.c
@@ -28,6 +28,7 @@
 #include "cpu.h"
 #include <86box/io.h>
 #include <86box/timer.h>
+#include <86box/pic.h>
 #include <86box/pit.h>
 #include <86box/mem.h>
 #include <86box/rom.h>
@@ -607,6 +608,7 @@ cga_poll(void *priv)
                 cga->cgadispon = 0;
                 cga->displine  = 0;
                 cga->vsynctime = 16;
+                picint(1 << 5);
                 if (cga->crtc[7]) {
                     if (cga->cgamode & 1)
                         x = (cga->crtc[1] << 3) + 16;