Hi, and welcome to my page where I cover the gadgets I make and sell.  

Updates and random info below. I also post a few updates on https://twitter.com/IrkenLabs.

Fall Update - 2021

The MiSTer JAMMA Expander is finally released, it took a little longer than anticipated.  The PCB and the involved tech itself is not terribly complicated, but for this product I figure out how to source custom cables. 

The IC shortage was also a challenge, as the main IC on this board was not available in China where the boards are assembled.  I had to buy chips from a Norwegian distributor and FedEx them to the factory.

Another aspect that took a fair bit of time was trying to influence how MiSTer handles input, and it kind of reached a compromise - the default settings on the Expander makes it pretty much plug & play, and the hard way that is geared towards 'console' users.  A few developers are going to great lengths to make cycle-perfect recreations of Arcade boards, which involves stuff like de-capping and reverse-engineering IC's. 

In light of this, I find the reluctance to accommodate arcade users who expect coin, test and buttons in general to work like the original a little strange.  I'm pretty sure that a complete rework of the MiSTer input system is going to happen sooner or later.  Whatever the future holds, the Expander supports both methods (MAME keyboard with standard layout, and 2 x gamepad).

By the time you read this, it's almost guaranteed that the Expanders are no longer in stock.  I'm looking into having more made, but not ETA yet, and the price will likely be a little higher than the first batch.

As I now know how to get custom cables made, used this new 'capability' to have a few ATX to JST-VL (Naomi) adapters made.  It's basically a copy of something I made for myself some time back when one of my earlier 'hacks' failed on me, and I decided to make something proper.  They feature soft silicone wires, the type you get on good test leads, and has double wires for 3.3V and 5V that should minimize voltage drop to the point that adjusting voltage is not needed.  I don't expect to ship any of these as single orders, but you may consider adding one to your order if you're buying something else.  Next time I may get some kick cables for the Jammafier made, I totally forgot about that this time around.

 

(MiSTer) DE10-Nano JAMMA Expander

It seems like everyone and their mother is working on a different types of JAMMA solutions for the MiSTer project, and I am too :)

 

I haven't settled 100% on a name yet, but for now the working title is simply "JAMMA Expander", as it expands the DE10-nano to work in a JAMMA cabinet.  It doesn't have a zillion features, but aims to make running MiSTer in a cabinet as easy and clean as possible.  If you want a really good "multi-pcb" for use in a cabinet, but don't feel like a taking on a project - this may be the board for you. 

This board uses the HDMI output of the MISTer, so both video and audio will be as good as it can get.

Some specs

  • 24 bit color, coupled with a high quality DAC and RGB amplification.
  • It has a decent audio amplifier for MONO audio, but you can also toggle a switch to get line level stereo via RCA if you have a stereo amplifier in your cab.
  • Hassle-free firmware updates via micro-SD, very much the same way as the Jammafier and the JVS-PAC 2
  • an OLED for diagnostics

You mount the DE10 on top of this board, not under - so fitting it in a cab should be very simple, and it's also easy to remove the DE10 should you want to use it for something else.

Availability should be sometime this summer ;), price is TBD.

Winter Update - Happy 2021

A long overdue winter update!  My lab is now operational and there is actual r&d happening :)

MiSTer!

I'm happy to report that the JVS-PAC 2 and MiSTer are now friends, and it makes for a very easy and nice setup!  I've added a tutorial on getting a MiSTer up and running in the JVS-PAC 2 section.  To make things more plug and play, I've updated the default key-mapping for Player 2 Button 5 to "E", which is the MAME standard and also used in Jotego's fantastic cores e.g. the CPS1 - i.e. no complicated merging/unmerging of devices or remapping of input.

If you already have the JVS-PAC 2, all you need in addition to the DE10-nano is an SDRAM module.

 

For Jamma cabinets, a little more hardware is involved in making the DE10-Nano cabinet friendly, but I'm confident there be solutions for that soon :)

Stock Levels 

 

Stock levels are healthy, and I don't expect that to change anytime soon.