diff --git a/.gitignore b/.gitignore
index fd0a707..676e15e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -156,3 +156,6 @@ projects/tzpuPico/esp32/version.txt
 .claude/
 projects/tzpuPico/kicad/PICO6502/
 projects/tzpuPico/kicad/PICOZ80.old/
+
+# Large disk images — distributed as release assets, not in git
+*.img