Short introduction to JVS

JVS, or Jamma Video Standard (sometimes even called JAMMA 2), is a specification by a JAMMA special sub-committee consisting of the major arcade game manufacturers.  

JVS specifies the type of connectors to use for video (HD-15), audio (RCA) and power (JST VL), in addition to the communications protocol between the game board and the I/O board.  In contrast to (old) JAMMA, JVS concentrates I/O functions in a separate board.  The protocol is well documented, but only in Japanese (thank you google translate & altavista babelfish 🙂 )

Short introduction to JVS-PAC 2

The JVS-PAC2 is a small device  that enables you to play MAME on your JVS cabinet with a minimum of hassle.  It is the successor to the now end-of-life JVS-PAC.  The JVS-PAC2 behaves like a JVS game to the I/O controller, and a USB keyboard to the computer. The keyboard output is mapped to standard M.A.M.E keys.

The main advantages of this setup is:

  • No special (or modification to existing) cabling required – all buttons work out of the box
  • You can swap between MAME and JVS games very quickly
  • Your JVS cabinet stays original
  • It’s easy


The JVS-PAC 2 is tested, but it is impossible to qualify all operating systems, computer architectures, emulators and front-ends it may be used with in advance.  As of 2019-04-21, the JVS-PAC is tested and works without any known issues with:

  • Windows 10 64bit
  • Windows 7 64bit
  • Mame
  • GroovyMame
  • Attract-Mode frontend

New features and enhancements from original JVS-PAC

  • Rapid JVS updates for low lag
  • Enhanced shift-key operation, works with 1-player panels
  • Configurable keyboard mapping
  • Easy firmware update
  • OLED screen with menu
  • Cabinet linking
  • Support for 4 player, either with Capcom IO in 4 player mode, or cabinet linking
  • 4 mounting holes, and shipped with screws and PCB standoffs 🙂

The JVS-PAC is not an product – and I am not affiliated in any way with (I am however a happy customer, and Andy didn’t mind me using the name JVS-PAC)

Last Updated on 2022-08-21 by admin