Irken (MiSTer) JAMMA Expander

[invzim]

Sooner or later, chips will be available again so more units can be produced - in the meantime I’m tinkering with an updated revision.

I guess a USB hub could be useful, any other essential features I should plan for? Focus is still for it to be an arcade solution for people with arcade cabinets..

Sooner than later I got hold of some IC's and will do a small run with the ones I received, hope to have them available before Christmas.

Main difference is smaller PCB, USB hub with 4 ports, and better cables. I haven't received cables yet, but they should be better than before

 

[Mackie]

Like some people reported, I also experienced the input issue on progear (at least I really noticed it on this one), very often, at some specific point in the stage 1, I get up that is blocked.
Because it looked like it was happening at specific spots, I thought this was related to the core itself. But before coming here and reading the last few messages, it's the first time I read some people facing that very same issue. I did not hear of read anything from other users about this. So maybe this is something with the expander?

 

[alamone]

I'm not an electrics expert, but it sounds like the pull-up resistor for the UP line might not be strong enough to register as OFF all the time?
I forgot to mention that I had a 74LS245 in-line with my joystick inputs as I was testing some input splitting (duplicating) for comparing PCB to MiSTer.
That might be why I had no issue with stuck inputs. If you have a multimeter, maybe check the voltage measured between GND and UP?

 

[invzim]

I have not been able to reproduce yet. I doubt it's related to pull-up strength, but IF you encounter a stuck input - please immediately navigate to the input test on the OLED, that will reveal if it's a physical input issue - or if state is lost somewhere else (expander, usb on MCU, usb on linux, core).

 

[thegreathopper]

I seem to of changed a setting where my Mister boots straight in to a game on the arcade core after power on, weird thing is I tried another SD card I had and the same happens… have I changed something on the Jamma expander?

I want to get the menu back up on start up, any ideas.. Thanks

 

[BuddyC]

@thegreathopper
Have you checked your mister.ini settings and bootcore?

 

[thegreathopper]

Aha let me check, Thanks.

 

[thegreathopper]

Aha let me check, Thanks.

Trouble is I cannot get to that menu,, tried holding start for 2 seconds but it just takes me to the core menu and not the Script menu..

 

[Dloop]

You can edit it in a text editor like notepad on your computer if you load the sd card there. It is the mister.ini file

 

[thegreathopper]

Will try that, thanks.

 

[thegreathopper]

Think I need to start again, didn’t really understand text editing although I did get the text in notepad.

 

[AlxUnderBase]

Think I need to start again, didn’t really understand text editing although I did get the text in notepad.

Power up your device , go to scripts , go to ini settings , go down to lastcore - enter (and there you have possibility to disable) . It's easy !

 

[thegreathopper]

Not that easy as I cannot get to that menu with the script, just back to the core.

 

[Dloop]

Not that easy as I cannot get to that menu with the script, just back to the core.

I think if you want to do it while it is hooked up to a cab then go right with the analog stick at the top menu and you should get into the more setup style menu

 

[gomadosnitro]

I cant get jamma expander booting in Gamepad mode, i updated to the last version and inserted a microsd i jamma expander, select gamepad mode and select in menu save pressing A.
the firmware is 2022-04-29
buy in the sd a can just see a file named jexpand.ini
what im doing wrong?

this is what it says the jexpand.ini
[keyboard]
M_VOLDOWN=KEY_VOLUMEDOWN

 

[invzim]

I cant get jamma expander booting in Gamepad mode, i updated to the last version and inserted a microsd i jamma expander, select gamepad mode and select in menu save pressing A.
the firmware is 2022-04-29
buy in the sd a can just see a file named jexpand.ini
what im doing wrong?

this is what it says the jexpand.ini
[keyboard]
M_VOLDOWN=KEY_VOLUMEDOWN

Most likely your sd card is formattet with exFat (where reading works, but write bugs out for some reason). Try formatting it with another fat type, I should add that to the FAQ for the expander, it's the same for all the stuff I make unfortunately.

 

[gomadosnitro]

Most likely your sd card is formattet with exFat (where reading works, but write bugs out for some reason). Try formatting it with another fat type, I should add that to the FAQ for the expander, it's the same for all the stuff I make unfortunately.

NP mate, yes is formated in exFat i will try to reformat in fat 32 intead

 

[thegreathopper]

Now after starting from the beginning I cannot get any Arcade games to load, the Roms seem to be there but in the wrong place. Each time I select a game I get this screen..been using the update all script.

 

[gomadosnitro]

I have the same problem!
The Microsd problem was fixed with fat32 card

 

[AlxUnderBase]

Now after starting from the beginning I cannot get any Arcade games to load, the Roms seem to be there but in the wrong place. Each time I select a game I get this screen..been using the update all script.

Sir , your problem has nothing to do with Jamma Expander . That is related by MiSTer , that core is Jotego core ... but is strange , i just made update all and here is loaded !
Anyway , search in games / mame folder if you have alexkidd.zip (this is the game) . why i say this is because sometimes , update all doesnt download all games from mame