README

New version

• Instead of going into tmbinc's IPL it shows a very simple menu with all dol files on the card
• The IPL is installed as a dol, so you can still upload software over tcp/ip
• Uses kenobi's latest codes

Limitations:

At the moment it was only tested with Action Replay 1.06 There seem to be problems with 3rd party memory cards. I'm using a nintendo memcard-59.

Installation:

MAKE A BACKUP OF YOUR MEMORY CARD! It takes only a minute to do it with ctr-gcs, so don't complain if you loose any data! I normally make both an image of the card and a copy of each individual file.

(Did you make a backup? No? Do it now!)

1. Put the card you want to use into the second slot.
2. Boot your Action Replay and create a cheat database on the card. Use the Reset/Update feature in the options menu.
3. Upload install.dol into your cube using psoload. Attention: it deletes all existing codes from the cheat database. That is why you made the backup, remember?
4. Reboot the cube when it says "Done!"

If everything went right you should have three additional files on your card: level2.bin (BIN icon), level3.dol (DOL icon) and ipl.dol (DOL icon)

Usage:

1. Boot the Action Replay, select the cheat for "Action Replay", activate all cheats, press start, open/close the lid
2. Select "Start Game" from the menu, open/close the lid
3. Select a program from the menu and press start or a. ipl.dol is tmbinc's bootloader
4. Enjoy tmbinc's boot loader

You can load your own DOL files using nc (netcat):

(The address is set up to 192.168.0.15. If you have the source to tmbinc's bootloader you can change it to something else. Maybe I change it so that the IPL uses a settings file on memcard. Or some unused bytes in SRAM? There is some dhcp code in lwip as well. Suggestions or code are welcome!)

It supports uploading of ELF and DOL programs, so the message "no elf image at address xxx" is normal. DOL programs have the advantage that they are directly loaded to the correct address, while ELF files are read into a buffer and then copied.

Alternatively you can put the 64-byte gci header in front of your own DOL files and upload them to your memcard. Download level3.dol from the card for an example. Or you can modify the installer to include a different file.

How does it work?

The Action Replay code is a tiny piece of code that reads one block (8192 byte) from the memorycard into RAM and jumps to the start. This is the reason why you need the installer as well: The address of this block is only known after level2.bin has been written to the card. This block contains a more advanced loader that can search on the memorycard for a file and can use the filesystem to read the correct blocks. The file that is read is just a normal DOL file, with the address selected to not conflict with the loader

Credits:

• level 1 loader is 99% of tmbinc's CPLD bootstrap loader
• level 2 loader based on CrowTRobo's memorycard functions and Costis' GCLIB library
• level 3 is a simple menu, based on OpenGC and GCLIB
• ipl.dol the latest version of tmbinc's ipl program
• The installer depends on Peter's OpenGC lib and Costis' GCLIB. The encryption was copied from Parasyte's GCNcrypt program. 検討中 decoded the AR database format.
• writing the Action Replay code was only possible thanks to Kenobi's and Parasyte's documentation

Thanks:

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