Here are the main changes:

* Implemented IPC Synchronise Register
* Implemented IPC Fifo Control Register
* Implemented graphic modes 3 e 5
* Implemented Memory Card Register
* Added extended palette layers
* Added extemded palette sprites
* Fixed some errors in FIFO 3D
* Fixed some errors in texture loading
* Fixed some errors in Video Memory remap
* Fixed some errors in new System Control Coprocessor

...and other small things

you can get it from here