NOR

NOR typically refers to the NOR flash chip the application processor boots from. The baseband also uses a NOR flash. (See Wikipedia's article about flash memory for background on NOR flash in general.)

How to Access

This can be accessed using a patched iBoot or a kernel hack. It can possibly be dumped using /dev/kmem

Memory Map

Offset	Description
0x0	Configuration Data 0x0: "2GMI" fourcc 0x4: Block Size (0x40) 0x8: Images Section Location Offset 0xC: Images Section Location (In blocks) 0x10: Images Section Length 0x30: Checksum of this config data
0x4000	SysCfg Section
0x8000	Images Section
0xFC000	NVRAM Section (Note: This copy is the one iBoot uses)
0xFE000	NVRAM Section (copy)

Hardware

• iPhone -- some CFI compliant parallel NOR
• iPhone 3G -- 1MB SPI NOR flash
• iPod touch 3G and beyond -- The NOR is replaced with a dedicated partition of NAND