Treo 650 Bootloader Custom Code
From ShadoWiki
The current method for running custom code in the bootloader is to use a combination of the mb and mw commands to write arm code to RAM, then using the jump command to jump to it.
Creating custom code requires three pieces:
1. The ARM toolchain from handhelds.org 2. The armletld script 3. The makescript tool
When writing code, the code must be compiled with the -fpic GCC flag to specify that it should be linked as "position independent".
Disk-on-chip Layout
The disk-on-chip is organized into three volumes: two "translated volumes" (on storing ROM, the other storing NVFS) and one "binary volume" with the signature "BIPO" that stores the SPL.
Total number of volumes: 2 Scanning Volume 0 ================= mounting... returned status: 0x0 ... logicalSectors = 14144 bootAreaSize = 524288 baseAddress = 0 flashType = 39030 physicalSize = 33554432 physicalUnitSize = 32768 DOCType = 8 lifeTime = 1 driverVer = OS Less 6.6.1.0.0 OSAKVer = 6.1.0.0 cylinders = 1010 heads = 14 sectors = 1 Scanning Volume 1 ================= mounting... returned status: 0x0 ... logicalSectors = 48704 bootAreaSize = 8093696 baseAddress = 0 flashType = 39030 physicalSize = 33554432 physicalUnitSize = 32768 DOCType = 8 lifeTime = 1 driverVer = OS Less 6.6.1.0.0 OSAKVer = 6.1.0.0 cylinders = 1014 heads = 16 sectors = 3 Total number of binary partitions: 1 Starting block: 262144 Length: 262144
