You can set b2 as the program to open disk images in the Windows file explorer, or Finder on macOS, so you can double click a disk image file and have b2 boot it straight away. Supported disk image extensions are .ssd, .dsd, .sdd, .ddd, .ads, .adm, .adl and .adf.

When set up this way, double clicking a disk image will load the disk into drive 0, and attempt to auto-boot it. An existing copy of b2 will be used to do this if there's one running; otherwise, a new copy will open.

(You can choose to associate the disk images with either version of b2, and that one will launch if there's no existing copy running. But if there's an existing copy running, that one will be used, whichever version it is.)

You can also drag and drop disk image files onto a b2 window, with the same result.

Windows setup

1. Right click on disk image file and select Properties

2. Click the Change... button next to the Opens with: line

3. Select More apps from the list, scroll to the bottom, and pick Look for another app on this PC

4. Find b2.exe or b2_Debug.exe and select that

macOS setup

1. Right click on disk image file and select Get Info

2. In the Open with section, click on the dropdown list and select Other...

3. Find b2 or b2 Debug using the file selector, and click Add

4. Click Change All...

Running multiple instances?

If you run just one instance of b2 at a time, no problem.

But you can run several at once if you like, and in that situation only one of them will deal with these requests. To tell which, look in Tools > Options, HTTP Server section: if the HTTP server is listening, that's the instance that will deal with these requests.

If necessary, you can use the Stop HTTP server button to stop the HTTP server, and that will allow you to use the Start HTTP server button on another instance.