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c64-go

Frodo Port to ODROID-GO

Here is the precompiled Firmware file here: https://github.com/Schuemi/c64-go/releases

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Please create these directories on your SD Card manually:

/roms/c64/bios
/odroid/data/c64

and put the BIOS files in /roms/c64/bios. You need the files "1541 ROM", "Basic ROM", "Char ROM" and "Kernal ROM". (without a point between the name and "ROM"). For example you could get these files, if you download the Windows version of Frodo here: https://frodo.cebix.net/.

Your root folder to browse for games will be /roms/c64/. You can have subfolders in /roms/c64/.

Currently only .d64 and .t64 (tapes) files can be loaded.

In /odroid/data/c64 you can save keymapping files if you wish. The default keymapping is:

[KEYMAPPING]
UP = JST_UP
RIGHT = JST_RIGHT
DOWN = JST_DOWN
LEFT = JST_LEFT
SELECT = KEY_FM
START = KEY_R_S
A = JST_FIRE
B = KEY_SPC

The possible Key Mappings are: JST_UP, JST_RIGHT, JST_DOWN, JST_LEFT, JST_FIRE, JST2_UP, JST2_RIGHT, JST2_DOWN, JST2_LEFT JST2_FIRE, KEY_SPC, KEY_CUD, KEY_F5, KEY_F3, KEY_F1, KEY_CLR, KEY_DEL, KEY_SHL, KEY_SHR, KEY_HOM, KEY_R_S, KEY_COMM, KEY_CTL, KEY_BAK, KEY_POUND, KEY_SLO, KEY_RESTORE, KEY_FM or any digit or letter.

The KEY_FM is a spezial button (default on SELECT). This is the fast mode button. If you press this button, the c64 emulation will run very fast, so you can skip long loading times.

Some other key declarations: KEY_SPC Space key
KEY_CUD cursor UP/DOWN
KEY_SHL Shift on the left
KEY_SHR Shift on the right
KEY_R_S the run/stop key
KEY_HOM the "CLR HOME" key
KEY_CTL the CTRL key
KEY_BAK the button with the arrow to the left

You can use for every game a custom mapping file. Put the file in /odroid/data/c64. It should have the name [GAME].ini. For example if your gamefiles name is GTA3.d64 the keyfilename has to be GTA3.ini.

Also you can have a default setting. Go into /odroid/data/c64, if you have ever started c64 there should be a file called "config.ini". In this file you can add your defualt keymapping the same way you would add a key mapping for a game.

Gamesaves are saved in the same directory as the game itself. It is calles [GAME].sta and is compatible to every other Frodo port. So you can continue playing on WII, Android etc...

Virtual Keyboard:

You can open a virtual keyboard by pressing an hold the "A" button and then the "Menu" button. On the virtual keyboard you can use the "A" or the "B" button to press a key. If you are holding a button, this button will also be holded in the emulator. So if you go to the "shift" key, press and hold "A" and then while pressing "A" go to the "1" key and press "B" you will write a "!". Because on the real C64 if you would press shift + 1 you will also write a "!"

1541 Emulation

In the Menu you can activate the 1541 emulation (the 5 1/4 inch disc drive of the C64). If you activate this, the time to load a game will be much longer. But some games will only work with this option. The 1541 emulation will fall back to "No" if you reset. When you load a savegame, Frodo automatically sets or removes option 1541, depending on what was set at the time of saving.

NAV

To start games, the Emulator will start with the program "NAV". This is a file browser for the C64 with joystick support, so you don't have to use the keyboard.

Compatibility

Frodo has two modes: PC mode and SC mode. PC mode is much faster, but cannot play as many games as SC mode. The ODROID GO is too slow to run the SC mode. So not all games will work, but many! If a game doesn't work, please look for another version of this game. There is hope that another version from another release group will work.

Multiplayer (up to 4 Players!)

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Multiplayer is really fun. :)

For the third and the fourth ports I'm emulating a 4 Player interface. All games working with this Interface will also work in the emulation with up to 4 Odroids Go. My favorite is Bomb Mania :)

To use multiplayer you need to have exactly the same BIOS files on both devices and the same game file (*.d64) in the same directory. The best way is to simply copy the SD from one device.

One is the server, the others are up to 3 clients. The server starts a game with "start multiplayer server" in the menu, the others choos "multiplayer client". The server selects a floppy disk. All devices will restart and they run now the same game.

The "joystick" of the server runs in port 1, the first client has port 2, the thrid is the first port of the 4 player interface, and the forth is the second of the 4 player interface.

In multiplayer mode there are a few limitations:

  • You cannot enter the menu. To start another game or not to play in pairs, please turn off the devices.
  • no save games

Most games working in single player, also work very well in multiplayer. I have tested some games, my favorites were : Blood Money, Pitstop II, IK+, Baberian, Bubble Bobble and all the 3 and 4 player games on Protovisions page

You can't have two Multiplayer games with 4 devices at the same place yet. They're gonna bother each other, because there are no "Multiplayer rooms" yet.

How does this work?

  • The server starts an access point with a hidden Siid
  • The clients are searching for this access point, if he finds it he will connect
  • The server tells the clients what game they whant to play
  • after starting the game on all devices they broadcast RAW TCP packts with joysick and keyboard data to each other. All devices have to know what the other is doing in every vblank.

Rewind

You can rewind up to 6 seconds, should be enough to defeat this devilish monster!

Menu wheel

Menu wheel

By pressing select you can open the Menu wheel. If you press up while pressing select, the Keyboard will open. Pressing down, the state saves. Pressing left will rewind and pressing right will forward.

SAM (Simple Assembler and Monitor) (Thanks fogsag !)

Frodo has a built-in machine language monitor that can be activated by selecting the menu item "SAM". It provides full access to the memory and hardware of the emulated C64 and 1541. SAM is controlled by a command-based interface, you have to connect your Odroid-Go to the PC to use it.

To learn more about SAM, please read the Frodo documentation.

Next:

The next things I'm planning are:

  • Bugfix, bugfix, bugfix.

Donations

Donations are very welcome. I have long wondered if I should add a donate button here or not. But, what the hell, if one or the other beer should come out for my troubles here, I like to drink one to you! Thanks a lot!

One beer donation (3.50€): 3.50

Two beer donations (5.00€): 5.00

Donate a six-pack of beer. :) (10.00€): 10.00

Hint: If you find any spelling or grammatical mistakes, please tell me. My english could be better. Thank you.