Kickstart ROM switching support

[penfold42]

F1..F4 select kickstart roms with PB8, PB9 OSD config for

• binary 0..3 on 2 bits for large multibank eproms
• discrete outputs for 2 chip kickstart switchers F9/F10 sets PB10 low/high for other uses (pal/ntsc, DF0/DF1 swap) Uses OSD to show current settings. Config options to set poweron defaults

[keirf]

Do you know how to "git rebase -i"? Let's get keirf:pins agreed and into master, and then it would be preferable if you could rebase and squash these commits on top.

[penfold42]

Ok, I think I know enough git to be dangerous - stack overflow for the pin.

Check out https://github.com/penfold42/FF_OSD/tree/kick_on_pins

[keirf]

Ok I'm going to refactor this one, to create a generic concept of hotkeys and their actions on pins in GPIOB. I will make them display an OSD notification when hotkeys are pressed. And I will include an optional config which implements the hotkey actions in your patch.

The downside will be no run-time configurability. Yet. As you say we can assume full keyboard so I think we'll make this configurable via keyboard and perhaps serial, on a second config menu.

[penfold42]

Cool.

While you’re hacking at the keyboard code:

• In config, “Help” should exit config menu
• delete should force the OSD off (as a toggle)

[keirf]

Okay this is done and in master. See what you think: The config is in default_config.c.

[keirf]

'Help' exits config menu: It could, it's a bit of a pain to implement, and what do you do with the half changed config?

'Delete' forces I2C OSD off, presumably? And forever until 'Delete' pressed again?

[keirf]

'Delete' -> OSD On/Off is now in master. It's also tempting to put this on a push button at say PB5.

[penfold42]

Excellent !

On the help front - use or discard would be ok.

For me, it’s mostly usefully on the banner screen - oops, get me out of here.

[keirf]

You can bash through with Up Arrow a few times and get outta there... But I will look to implement your suggestioon.