TransitFM1

A tiny firmware for the M-VAVE FM-1 to stop at between two others: every installer takes it for the official V15, and the write that replaces it is guarded until its last sector.

Before you start

For Baud Girl, go through the official V15: install V15 from here, then Baud Girl with its own installer. Its image is larger than TransitFM1 can write; TransitFM1 0.1.2 let Baud Girl's installer try anyway and left an FM-1 dark, so 0.1.2 was withdrawn. 0.1.3 refuses such firmware itself.

Arriving from V15, a cut-off write ends in the chip's USB boot rather than update mode: have MvaveFM1Unbricker (Windows or Linux) or the FM-1 Transporter in mind. Close any app that sends MIDI to the FM-1 while you install. Installing firmware is at your own risk.

Install

Chrome or Edge on a computer; the FM-1 charged, switched on and connected with a USB data cable, directly. TransitFM1 …, released ….

Log

  


  

    
If an install is cut off

    
From TransitFM1, a pulled cable or a flat battery is not the end: switch the FM-1 off and on.
      Three short flashes of the key lights and a black screen mean update mode. Open this page (or the installer
      you were using) and press Install again with the same firmware: it finishes the write. Holding OCT-
      while switching on gives the same update mode at any time.

    
Do not switch off and on twice in a row while it is in update mode: the second time it drops into the
      chip's own USB boot ("WL82 UBOOT1.00"), where MvaveFM1Unbricker
      takes over (Windows or Linux).

  


  

    
Leaving TransitFM1

    
Install the next firmware with its own installer: it sees an FM-1 on the official V15. Whatever
      the package, TransitFM1 writes it with its own update loader, the new firmware's first sector last. To go back to
      stock, install M-VAVE's FM-1.fwsc. Baud Girl, and any firmware whose image is larger than
      the app area: install V15 first, then that firmware from V15.

    

      Install a package file from here
      
An FM-1 package (.fwsc), for example M-VAVE's FM-1.fwsc or the release
        of the firmware you are going to. Also finishes a cut-off install of that file.

      

        
        
      

    

  


  

    
How much of a write is guarded

    

      
hopcut points with no rescue

      
TransitFM1 → the official V15, or any firmware without ChoralRoot's stub16 of 2432: the last sector

      
TransitFM1 ↔ ChoralRootnone

      
the official V15 → TransitFM117 of 2432 (the first sector); the other cuts end in the chip's USB
        boot, not update mode (V15 stages the loader where the boot stub does not look)

    

    
A power cut after every flash erase and every programmed page, judged by the boot stub's own code (host
      tests). How it works. Not from Bubba
      Machine: its updater accepts only M-VAVE's package; go back to V15 with its installer first.