[FR] Add additional GPIO functions

[TomDDG]

Some ideas for additional GPIO functionality which could be used with a Pi IO Hat to make a neat little package.

Reset Button - Just to reset the emulation, hard reset probably the best or maybe two buttons one for soft one for hard
Disk Menu Button - Jumps straight into the insert disk part of the menu
Tape & Cartridge Menu Button - As for disk
Tape Control Buttons - Play/Pause, Rewind etc... Eject could be the same as Tape Menu button
Swap Joystick Ports Button - Just a shortcut to the menu option, basically swaps GPIO1 & 2
Disk Access/Tape Access LEDs
Warp mode button

[b4nd1t0]

any news about the implementation of these features on the gpio?

[randyrossi]

Not yet but you can now map USB gamepad buttons or Commodore+F# hot keys to some of the functions above: (Soft/Hard reset, Tape controls, Swap Joys, Warp). I'm working on a PCB specifically for BMC64 that would let you hook up a real C64 keyboard and joysticks directly via GPIO. That PCB would have power LED connector, power switch and power jack so it would be a better solution for those wanting to replicate the original feel of the machine when they put the Pi inside a shell (The keyrah's switch is not for cutting power nor is the usb port for delivering power, it's kind of too generic a solution for me). Doing that mostly for myself but I will make the schematics and gerber files available on oshpark when I'm done. Perhaps I will have two modes in the end; 'pcb' mode where you want to embed the Pi inside a shell with that PCB I just mentioned and 'hat' mode with just joysticks and buttons/leds for a hat like the pi1541. But with the keyboard shortcuts and gamepad buttons, I see less of a reason to put buttons on a hat. Maybe LEDs for drive/tape activity or reset. I'm going to post to the lemon forum thread my plans and see what others think.

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On Fri, May 31, 2019 at 7:18 AM b4nd1t0 ***@***.***> wrote: any news about the implementation of these features on the gpio? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#1?email_source=notifications&email_token=AAI3HKFV22DWXV5GWMH2JA3PYECPRA5CNFSM4GUPQN5KYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGODWU6KPQ#issuecomment-497673534>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAI3HKG5R4FWQMLQHIJUKPLPYECPRANCNFSM4GUPQN5A> .

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[CemTezcan]

@randyrossi

That would be amazing! I already made a real c64 imlementation as a prototype with soarer's keyboard solution mentioned on this link: #6

It works perfect with 1084 CRT monitor. BTW, I use 2.0 version with Commodore 1084 monitor. New versions of BMC64 are not adjustable to correctly match CRT scanlines with the pixels (changes on the offset and overscan commands). When I have time I will create an issue form on that to describe the inability of newer versions on 1084 monitors.

This is the implementation that I made:
https://www.facebook.com/groups/commodoresixtyfour/permalink/10156140173577172/

Also that GPIO access will be very useful on creating a micro portable BMC64 lite emulator with designing a good printable case for pi zero.

Thanks for this great work. I already stopped using real hardware at least for a while.

[randyrossi]

Navigation functions were added to GPIO config 1. Other functions mentioned are available using a gamepad.