From 3d1c417e15eee5e58d6de50246b2ee297e57ac3d Mon Sep 17 00:00:00 2001
From: Oxore <oxore@protonmail.com>
Date: Sun, 26 May 2024 23:09:42 +0300
Subject: Fix hang up when MODESET2_IE0 is disabled

---
 vdp.cpp | 2 +-
 vdp.hpp | 7 ++++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/vdp.cpp b/vdp.cpp
index df8722d..47e6d6e 100644
--- a/vdp.cpp
+++ b/vdp.cpp
@@ -559,8 +559,8 @@ bool VDP::Scanline()
         if (MODESET2_IE0_GET(mode_set_2)) {
             m68k_set_irq(M68K_IRQ_6);
             _status.vblank = true;
-            return true;
         }
+        return true;
     }
     _status.vblank = false;
     return false;
diff --git a/vdp.hpp b/vdp.hpp
index 1b67625..f62345d 100644
--- a/vdp.hpp
+++ b/vdp.hpp
@@ -51,7 +51,12 @@ public:
     constexpr VDP(const uint32_t base_address_a): base_address(base_address_a) {}
     uint32_t Read(uint32_t offset, enum bitness);
     void Write(uint32_t offset, enum bitness, uint32_t value);
-    bool Scanline(); // Returns true if display disabled or vblank happened
+    /** Renders a horizontal line (scan line).
+     *
+     * Returns true if display disabled or VBLANK could've had happened, even if
+     * VBLANK is disabled (MODESET2_IE0 is 0).
+     * */
+    bool Scanline();
     void Reset();
     constexpr const uint32_t* GetRenderedBuffer() const { return _rendered_buffer; }
     static const char* RegIDToString(RegID);
-- 
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