From 12846317cb4b4be6bb0b7b98892d66f0222dc0f1 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Mon, 26 Aug 2024 21:13:25 -0400
Subject: [PATCH] Short-circuit non-interrupts.

---
 Machines/Acorn/Electron/Electron.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Machines/Acorn/Electron/Electron.cpp b/Machines/Acorn/Electron/Electron.cpp
index 511fbe7a6..eb69eced0 100644
--- a/Machines/Acorn/Electron/Electron.cpp
+++ b/Machines/Acorn/Electron/Electron.cpp
@@ -687,6 +687,9 @@ template <bool has_scsi_bus> class ConcreteMachine:
 		}
 
 		inline void signal_interrupt(Interrupt interrupt) {
+			if(!interrupt) {
+				return;
+			}
 			interrupt_status_ |= interrupt;
 			evaluate_interrupts();
 		}