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-rw-r--r--src/emu/debug/debugcpu.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/emu/debug/debugcpu.cpp b/src/emu/debug/debugcpu.cpp
index 5124204a500..dfc581d478b 100644
--- a/src/emu/debug/debugcpu.cpp
+++ b/src/emu/debug/debugcpu.cpp
@@ -767,7 +767,8 @@ u64 debugger_cpu::read_opcode(address_space &space, offs_t address, int size)
void debugger_cpu::on_vblank(screen_device &device, bool vblank_state)
{
/* just set a global flag to be consumed later */
- m_vblank_occurred = true;
+ if (vblank_state)
+ m_vblank_occurred = true;
}