diff --git a/src/lib/WebVM.svelte b/src/lib/WebVM.svelte
index 76b02b5..356eb7e 100644
--- a/src/lib/WebVM.svelte
+++ b/src/lib/WebVM.svelte
@@ -15,6 +15,7 @@
 
 	export let configObj = null;
 	export let processCallback = null;
+	export let cacheId = null;
 
 	var term = new Terminal({cursorBlink:true, convertEol:true, fontFamily:"monospace", fontWeight: 400, fontWeightBold: 700});
 	var cx = null;
@@ -124,7 +125,7 @@
 			default:
 				throw new Error("Unrecognized device type");
 		}
-		var overlayDevice = await CheerpX.OverlayDevice.create(blockDevice, await CheerpX.IDBDevice.create("block1"));
+		var overlayDevice = await CheerpX.OverlayDevice.create(blockDevice, await CheerpX.IDBDevice.create(cacheId));
 		var webDevice = await CheerpX.WebDevice.create("");
 		var dataDevice = await CheerpX.DataDevice.create();
 		var mountPoints = [
diff --git a/src/routes/+page.svelte b/src/routes/+page.svelte
index 8f4c942..436feea 100644
--- a/src/routes/+page.svelte
+++ b/src/routes/+page.svelte
@@ -11,4 +11,4 @@ function handleProcessCreated(processCount)
 }
 </script>
 
-<WebVM configObj={configObj} processCallback={handleProcessCreated} />
+<WebVM configObj={configObj} processCallback={handleProcessCreated} cacheId="blocks_terminal" />
diff --git a/src/routes/alpine/+page.svelte b/src/routes/alpine/+page.svelte
index b9099ce..4a3f5b6 100644
--- a/src/routes/alpine/+page.svelte
+++ b/src/routes/alpine/+page.svelte
@@ -11,4 +11,4 @@ function handleProcessCreated(processCount)
 }
 </script>
 
-<WebVM configObj={configObj} processCallback={handleProcessCreated} />
+<WebVM configObj={configObj} processCallback={handleProcessCreated} cacheId="blocks_alpine" />