Check econet is enabled before accessing data

Fixes #456
mattgodbolt · Nov 11, 2024 · 487c598 · 487c598
1 parent 4e5f366
commit 487c598
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/6502.js b/6502.js
@@ -735,12 +735,13 @@ export class Cpu6502 extends Base6502 {
     }
 
     handleEconetStationId() {
+        if (!this.econet) return 0xff;
         this.econet.econetNMIEnabled = false;
         return this.econet.stationId;
     }
 
     handleEconetNMIEnable() {
-        if (!this.econet.econetNMIEnabled) {
+        if (this.econet && !this.econet.econetNMIEnabled) {
             // was off
             this.econet.econetNMIEnabled = true;
             if (this.econet.ADLC.status1 & 128) {