Firmware update

Firmware update

The firmware can be updated using a standard Micro SD card. The card must be formatted with a FAT file system.  It is not possible to ‘brick’ or damage the unit during firmware update, if you experience an error – simply try again.

Download zip file below, and extract files to root of sd card.

Update procedure

  • Power off system
  • Insert SD card into Jammafier
  • Press and hold both A and B button
  • Power on system
  • Follow instructions on screen


Firmware, works on all revisions

2023-09-10 – Fixed/Improvements in this release

  • Major JVS update
  • Internal cleanups and updates

2022-07-28 – Fixes/Improvements in this release

  • Shipped with rev 2.0 boards
  • Internal code cleanup
  • Compatible with earlier revisions

2020-04-22– Fixes/Improvements in this release – shipped with Rev 1.7 boards

  • Optimized start sequence
  • Shows voltages when no IO is connected/detected, including 3.3V rail
  • Internal cleanups and updates

2020-04-12– Fixes/Improvements in this release

  • Screen saver
  • Correctly identifies G-Balance IO board 
  • Correctly identifies Cyber Lead 2.02 IO board
  • Fix bug affecting cabinets with Taito RF-ID card readers
  • 2 new MVS remaps to mimic NeoGeo pads
  • Ability to access MVS Universal Bios menu/test by holding button A or B on start
  • Remap type ‘tate’ for playing vertical games in horizontal cabinet
  • Shows firmware version and voltages, including 3.3V, if there is a JVS issue

2019-02-16– Fixes/Improvements in this release

  • Correctly identify Konami Windy 2 IO board
  • Fix debug to file

2018-12-02 – Fixes/Improvements in this release

  • Increase duration of coin pulse and make it configurable via .ini file

2018-09-17 – Fixes/Improvements in this release

  • Correctly identifies Namco Noir IO board
  • Correctly identifies Egret 3 IO board
  • Fix Vewlix IO typo
  • Menu system with options and config save to micro-sd card
    • Neo Geo remap
    • Option to have buttons 4&5 on JST-XH only
    • JVS Input test
    • Display PCB version and serial number

2018-08-20t2 – Increase packet reception timeout

2018-08-20t1 – Add debug 3.3V reading, adjust startup timers

Last Updated on 2023-09-11 by admin