diff --git a/www/src/ts/utils.ts b/www/src/ts/utils.ts
index aec801b..594b0ed 100644
--- a/www/src/ts/utils.ts
+++ b/www/src/ts/utils.ts
@@ -175,5 +175,38 @@ export function parseNumber(s: string): number {
     case 'epsilon':
       return Number.EPSILON;
   }
+  if (/^%[01]+$/.test(s)) {
+    return parseInt(s.slice(1), 2)
+  }
+  if (/^\$[0-9A-Fa-f]+$/.test(s)) {
+    return parseInt(s.slice(1), 16)
+  }
+  const hex = parseHex(s);
+  if (!isNaN(hex)) {
+    return hex;
+  }
   return parseFloat(s);
 }
+
+export function parseHex(h: string) : number {
+  var val = parseInt(h, 16);
+  if (val.toString(16) === h.toLowerCase()) {
+    return val;
+  } else {
+    return NaN;
+  }
+}
+
+export function parseIntWithHexOrBinary(s: string): number {
+  if (/^%[01]+$/.test(s)) {
+    return parseInt(s.slice(1), 2)
+  }
+  if (/^\$[0-9A-Fa-f]+$/.test(s)) {
+    return parseInt(s.slice(1), 16)
+  }
+  const hex = parseHex(s);
+  if (!isNaN(hex)) {
+    return hex;
+  }
+  return parseInt(s);
+}
diff --git a/www/src/ts/virtual_machine/device.ts b/www/src/ts/virtual_machine/device.ts
index 26f1cd8..d4d9aa1 100644
--- a/www/src/ts/virtual_machine/device.ts
+++ b/www/src/ts/virtual_machine/device.ts
@@ -34,7 +34,7 @@ import "@shoelace-style/shoelace/dist/components/drawer/drawer.js";
 import "@shoelace-style/shoelace/dist/components/icon/icon.js";
 
 import SlInput from "@shoelace-style/shoelace/dist/components/input/input.js";
-import { parseNumber, structuralEqual } from "../utils";
+import { parseIntWithHexOrBinary, parseNumber, structuralEqual } from "../utils";
 import SlSelect from "@shoelace-style/shoelace/dist/components/select/select.js";
 import SlDrawer from "@shoelace-style/shoelace/dist/components/drawer/drawer.js";
 import { DeviceDB, DeviceDBEntry } from "./device_db";
@@ -339,7 +339,7 @@ export class VMDeviceCard extends VMDeviceMixin(BaseElement) {
 
   _handleChangeID(e: CustomEvent) {
     const input = e.target as SlInput;
-    const val = input.valueAsNumber;
+    const val = parseIntWithHexOrBinary(input.value);
     if (!isNaN(val)) {
       window.VM.changeDeviceId(this.deviceID, val);
     } else {
@@ -349,7 +349,8 @@ export class VMDeviceCard extends VMDeviceMixin(BaseElement) {
 
   _handleChangeName(e: CustomEvent) {
     const input = e.target as SlInput;
-    window.VM?.setDeviceName(this.deviceID, input.value);
+    const name = input.value.length === 0 ? undefined : input.value;
+    window.VM?.setDeviceName(this.deviceID, name);
     this.updateDevice();
   }