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edits
Changes
actual concrete info about mini -- yes, this means the rest will eventually be released, but don't bug me about it :)
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Mini Is Not IOS
+Mini Is Not IOS -- but it is a limited replacement that can fulfill many low-level tasks that IOS might interfere with.
+= Features =
+* Light-weight -- binary is approximately 50kbytes, 12,000 lines of code as of first release
+* Mostly IRQ driven :)
+* Supports debug output over the GPIO pins and USBGecko
+* Supports loading both ARM and PPC-side binaries over USBGecko (ala Wiiload)
+* Allows any memory address to be peeked or poked from the PPC (via IPC)
+* Contains drivers for the following hardware:
+** OTP, SEEPROM
+** AES engine
+** SDHC (at the sector level, or can load a file from a FAT FS on SD)
+** NAND (read/write at the physical level)
+** PowerPC (can read a PPC ELF file from SD into memory, and kickstart execution on the PPC)
+* Not dependent on IOS in any way -- as long as you can run it, it can do whatever it wants, regardless of what security features Nintendo patches into newer versions of IOS.
+= Limitations =
+* No real kernel architecture; no threading model, but most calls are asynchronous
+* No USB support (including Bluetooth for Wiimotes)
+* No WiFi support
+* No NAND FS support
+* No audio/visual capability (hardware limitation)
+All registers are exposed over IPC, so some or all of the missing driver functionality could conceivably be implemented on the PPC side.
+Note that this cannot execute at the same time as IOS; you can only have one or the other executing at any point in time. Switching back and forth between the two is left as an exercise for the developer.