Moving "DisMo" button on a ACA500+ due to Checkmate Plus 1500 case

[gurth]

The ACA500+ has a button on it which can be used to trigger HRTMon or Action Replay. When the ACA500+ is in Checkmate Plus 1500 case things get a little tricky because the card mounts upside down and I have no access to it when the lid is on.

Button is about where the ACA500+ and the Gotek collide:
https://imgur.com/NG2CD5S

Is there a way I can route a button to the outside / use an alternative method?

[gurth]

ah I think I need to create a level 7 (non-maskable) interrupt, somehow.

[Jope]

Just solder a pair of wires to the pins of the button and add another button in parallel. Check which pins get shorted with your multimeter in continuity mode while pushing the original button.

[gurth]

The button is on a daughter board and is hot glued onto the main, there looks to be 4 pins hanging off the button. hmm...

Been having a look around and it seems this is what I need but for an A500:
https://www.ikod.se/a1200-600-int7/
https://www.ikod.se/int7-adapter/

Seeing that the Paula will be technically be the same, just the form factor will be a little different from an A600, I might be able to rustle something up myself.

Also the Checkmate case has a Zorro slot available to me and reading around the same pins are on there too.

40 ----> IPL0
42 ----> IPL1
44 ----> IPL2

[Toni Wilen]

ACA500plus button can't be replaced with NMI button. It won't work.

[gurth]

Not even to activate the Action Replay?

[gurth]

What I want to do is have a hardware button to activate the Action Replay when I have it enabled. I do not need any other function of that button, it is the first time I have pressed it today.

[Jope]

Originally Posted by gurth

The button is on a daughter board and is hot glued onto the main, there looks to be 4 pins hanging off the button. hmm...

Yes, don't remove the dismo board, you should be able to solder from above if you're careful.

[gurth]

I have created this on KiCAD tonight:

https://imgur.com/B82jGBV
https://imgur.com/Vo3tqJM

The plan being to add a momentary switch to the pins allowing me to induce a LEVEL 7 interrupt and activate the Action Replay.

[Toni Wilen]

Originally Posted by gurth

Not even to activate the Action Replay?

No. ACA500plus button also sets hardware state and more (like checking button press length and matching it with menu selection).

Action Replay 2/3's button also isn't a plain NMI button, it also does memory remapping, sets hardware IO register state which tells AR code source of freeze: reset, breakpoint or freeze button.

[jotd]

plain NMI button is useful with software hrtmon

winUAE shift+F12 beats all contenders

[gurth]

Originally Posted by Toni Wilen

No. ACA500plus button also sets hardware state and more (like checking button press length and matching it with menu selection).

Action Replay 2/3's button also isn't a plain NMI button, it also does memory remapping, sets hardware IO register state which tells AR code source of freeze: reset, breakpoint or freeze button.

I see. Thank you for explaining.