Grobda shields not able to be activated

[PistolsAtDawn]

I appreciate the work that went into this core, and hopefully this report is accurate. To the best of my knowledge it is.

I cannot get the shields to activate on Grobda regardless of what I do. They can be seen working in the game's attract mode, but I cannot use them during gameplay. I have tried clearing the game's settings, rebinding my controls (using a bluetooth gamepad SN30 pro+), and as a last resort, re-running update_all. Nothing seems to work.

Obviously this isn't that big of a deal, but it does affect the gameplay a lot since you only have your laser and shields.

I'm not sure what other information would be helpful here, but please let me know if something more is needed from me. Again, I appreciate all the work. Thank you for the core!

[MacroFPGA]

Grobda uses a different custom IO chip so the command to read was not working. This has been fixed.

[gyurco]

Actually the "DAC" is part of the 19xx custom chip. I did it differently than you:
gyurco/Mist_FPGA@50b8be5

[MacroFPGA]

Mame didn't seem to be sure about it, they have it down as a board hack

I'm happy to use your version instead, so will change it over and redo the PR

Did you do anything to get around the port being left at 0x07 (rather than zero)? you seem to have an ENable signal which I guess sorts that one out.

The IO chip bit seems to need a revamp, since different games use slightly different customs, and it doesn't seem to implement the coins per credit, although that could also be down to the exact custom in use.

most of the code is in there, but may be nice to try and get it as 58XX, 56XX (and whatever others are used) modules at some point.

[gyurco]

I added the missing IO chip a while ago:
gyurco/Mist_FPGA@beff3a7

The port being left at non-zero shouldn't be an issue, as it's only used when the frequency is zero. And that confirms for me this is part of the custom chip.