The firmware can be updated using a standard Micro SD card. The card must be formatted with FAT filesystem.
Download zip file below, and extract files to root of sd card.
- Keep both A and B buttons pressed while connecting the USB cable - the display will show that firmware update is active.
- Follow instructions on screen
2021-02-15 MiSTer compatibility, changed default player 2 button 5 from I to E (MAME standard).
2021-01-13 Fix bug where coin stops working if IO board is rebooted or reconnected while JVS-PAC 2 remains powered
2020-08-02 A screensaver will kick in after 5 minutes to preserve OLED, hold B button for 2 seconds to wake it up. Internal memory optimization.
2020-06-30 Fix bugs related to 3 and 4 player inputs, added JVS input TILT1
2019-10-24 Correctly Identify IO board in G-Balance cabinets
2019-06-03 Fix bug with IO boards without any player inputs, fix IO board error counter reset, identify Taito RFID board
2019-06-02 Fix keyboard keys ALT,CTRL and SHIFT. All users should update to this version.
2019-04-22 Initial release
Firmware update problems
Message: Blank screen on startup
Cause: You're probably touching some of the components on the PCB
Fix: Disconnect, take care to not touch anything but the buttons and try again.
Message: card bad/missing
Cause: There is no card inserted, or the card is not accessible on the electrical level by the JVS-PAC 2.
Fix/Solution: Try another card.
Message: card format error
Cause: The file system is not readable by the JVS-PAC 2.
Fix/Solution: Verify that the card has a FAT filesystem on it. The JVS-PAC 2 is not picky about which FAT version (FAT32/exFAT etc), or computer system used to prepare the card.