From 73106d1c66b0a172a3ec4b251a70cf119ae1dbdd Mon Sep 17 00:00:00 2001
From: Apexo
Date: Fri, 3 Apr 2026 19:32:36 +0200
Subject: onBeforeInterrupt callback

---
 src/cpu/cpu.ts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/cpu/cpu.ts b/src/cpu/cpu.ts
index 6da0fee..1237f0a 100644
--- a/src/cpu/cpu.ts
+++ b/src/cpu/cpu.ts
@@ -93,6 +93,12 @@ export class CPU {
     /* empty by default */
   };
 
+  /**
+   * This function is called before handling an interrupt. Useful for clearing sleep
+   * states.
+   */
+  onBeforeInterrupt = () => {};
+
   /**
    * Program counter
    */
@@ -291,6 +297,7 @@ export class CPU {
     const { nextInterrupt } = this;
     if (this.interruptsEnabled && nextInterrupt >= 0) {
       const interrupt = this.pendingInterrupts[nextInterrupt]!;
+      this.onBeforeInterrupt();
       avrInterrupt(this, interrupt.address);
       if (!interrupt.constant) {
         this.clearInterrupt(interrupt);
-- 
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