User manual

Linux Guide taskit GmbH
11. Appendix
11.1. Memory map
11.1.1. Portux 920t EU + SW, Portux-MiniPC, Portux Panel-PC, Panel-
Card, MoLUX and Stamp
First of all you need to know that there are 2 main memory regions:
● the 16 MiB onboard Flash is mapped to address 0x10000000 – 0x10FFFFFF
● the optional 64 MiB Flash is mapped to address 0x10000000 – 0x13FFFFFF
● the 64 MiB onboard SDRAM is mapped to address 0x20000000 – 0x23FFFFFF
Further on you need to know the memory addresses of the OS, the root filesystem and
the bootloader including the used environment variables that are stored on the onboard
flash.
To ensure not to accidentally overwrite or delete the installed software and to know where
free space is available take a look at the following table:
Bootloader with environment variables 0x10000000 - 0x1005FFFF
Linux kernel image (uImage) 0x10060000 - 0x101FFFFF
Ramdisk image with root filesystem
(initrd.bin)
0x10200000 - 0x104FFFFF
10 MB JFFS2 for user data (/config) 0x10500000 - 0x10EFFFFF
User partition 0x10F00000 - 0x1XXXXXXX
Table 1: Memory addresses of installed software
Page 38 of 65 Version 1.26 (2008-04-30)