Old J-Pac Issues and Programming in DOS

[lacanian]

Hi,
 I have an issue where P1SW2 and P2SW2 buttons don't work on my J-Pac. I have tested with a multimeter and get a signal even from the J-Pac fingers.

I contacted Andy and he told me "The very old type of J-PACs don’t have upgradeable firmware. Its possible (but unlikely) that these inputs have been de-programmed. You can check this if you have a PS/2 keyboard using this method: www.ultimarc.com/interact.html".

So I booted into FreeDOS with the PS2 keyboard I just purchased for this. Executed "copy con nulll" then pressed CTRL-ALT-P and a bunch of garbage (mostly @@@) shows up. I don't see any kind of menu. However I do try pressing "R" in hope I can reset the board back to default.

It appears it is locked in "T" test mode as I can push a button and see it displayed on screen.

Any help navigating this would be appreciated.


 

[menace]

This is going way back but once I had a JPAC with a fried chip and a bunch of keystrokes went missing--Andy sent me a new one and it was good as gold after--it might be too old for him to have those chips laying about though...

[pbj]

If you've got one with surface mount chips, you're SOL.  If it's the socketed chips then maybe you can beg for replacements.

[lacanian]

Out with the old and in with the new. I just ordered a new J-Pac.

[pbj]

Or just wire your buttons to alternative inputs??

 

[lacanian]

Yeah I considered that however I really need to program some shift keys.

[pbj]

Not for mame you don't