idz: Deal with multiple load2on2 formats

src/idz/encoder/load2on2.ts

@@ -1,9 +1,37 @@
-import { Load2on2Response } from "../response/load2on2";
+import {
+  Load2on2Response,
+  Load2on2Response1,
+  Load2on2Response2,
+} from "../response/load2on2";
 
-export function load2on2(res: Load2on2Response) {
+export function load2on2(res: Load2on2Response): Buffer {
+  switch (res.format) {
+    case 1:
+      return load2on2_v1(res);
+
+    case 2:
+      return load2on2_v2(res);
+
+    default:
+      const exhaust: never = res;
+
+      throw new Error(`Unsupported 2on2 response format ${res["format"]}`);
+  }
+}
+
+function load2on2_v1(res: Load2on2Response1): Buffer {
   const buf = Buffer.alloc(0x04c0);
 
   buf.writeInt16LE(0x00b1, 0x0000);
 
   return buf;
 }
+
+// Same size but presumably incompatible somehow
+function load2on2_v2(res: Load2on2Response2): Buffer {
+  const buf = Buffer.alloc(0x04c0);
+
+  buf.writeInt16LE(0x0133, 0x0000);
+
+  return buf;
+}