Difference between revisions of "Hardware/Starlet"
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* [http://infocenter.arm.com/help/topic/com.arm.doc.ddi0198d/DDI0198_926_TRM.pdf ARM926EJ-S Technical Reference Manual] - CPU, MMU, Cache specs and programmer's interface | * [http://infocenter.arm.com/help/topic/com.arm.doc.ddi0198d/DDI0198_926_TRM.pdf ARM926EJ-S Technical Reference Manual] - CPU, MMU, Cache specs and programmer's interface | ||
| − | * [ | + | * [https://web.archive.org/web/20050308211243/http://www.arm.com:80/pdfs/DDI0222B_9EJS_r1p2.pdf ARM9EJ-S Technical Reference Manual] - CPU specs and programmer's interface |
| − | * [http://www.arm.com/miscPDFs/14128.pdf ARM Architecture Reference Manual] - Documentation about the ARMv5 architecture. | + | * [https://web.archive.org/web/20081221072959/http://www.arm.com/miscPDFs/14128.pdf ARM Architecture Reference Manual] - Documentation about the ARMv5 architecture. |
* [[IOS]] - the OS that runs on the Starlet and handles calls from the Broadway during game execution and while in the system menu. | * [[IOS]] - the OS that runs on the Starlet and handles calls from the Broadway during game execution and while in the system menu. | ||
* [[ARM Binaries]] - the formats used for Starlet executable code | * [[ARM Binaries]] - the formats used for Starlet executable code | ||
Revision as of 21:09, 12 August 2019
The Hollywood includes an ARM9 core to handle I/O and security, nicknamed the Starlet. This is a very interesting piece of hardware, as it basically does everything that makes a Wii different from a GameCube.
Note: this page is incomplete. Please expand it as you see fit!
Specs
- NEC ARM926EJ-S SoC. See also ChipWorks.
- Big endian for compatibility with the Broadway
- ARM and thumb instruction set
- Clocked at 243MHz (Hollywood clock)
Boot
- See also: boot process
Starlet is the first processor to run code in the Wii.
- Starlet boots from an internal Mask ROM, BOOT0 (about 1300 bytes of code out of 4K possible)
- boot0 decrypts, verifies, and runs the first few blocks of NAND, BOOT1 (up to the first 48 pages of flash)
- boot1 locates, loads, decrypts, verifies, and runs BOOT2
- boot2 bootstrap then loads the embedded ELF file
- boot2 starts the IOS
- IOS loads code into the EXI buffer and bootstraps the Broadway
Links
More information about the Starlet:
- ARM926EJ-S Technical Reference Manual - CPU, MMU, Cache specs and programmer's interface
- ARM9EJ-S Technical Reference Manual - CPU specs and programmer's interface
- ARM Architecture Reference Manual - Documentation about the ARMv5 architecture.
- IOS - the OS that runs on the Starlet and handles calls from the Broadway during game execution and while in the system menu.
- ARM Binaries - the formats used for Starlet executable code
- WAD Files are used for BOOT2 and the IOS