63 lines
2.2 KiB
Markdown
63 lines
2.2 KiB
Markdown
---
|
|
title: GA-G41M-ES2L flashing tutorial
|
|
...
|
|
|
|
This guide is for those who want libreboot on their Intel GA-G41M-ES2L
|
|
motherboard while they still have the original BIOS present.
|
|
|
|
Flash chip size {#flashchips}
|
|
===============
|
|
|
|
Use this to find out:
|
|
|
|
flashrom -p internal
|
|
|
|
Flashing instructions {#clip}
|
|
=====================
|
|
|
|
Refer to [spi.md](spi.md) for how to set up an SPI programmer for
|
|
external flashing. *You can only externally reprogram one of the chips
|
|
at a time, and you need to disable the chip that you're not flashing,
|
|
by connecting 3v3 to /CS of that chip, so you will actually need second test
|
|
clip or IC pin mini grabber.*
|
|
|
|
NOTE: on GA-G41M-ES2L, the flash shares a common voltage plane with the
|
|
southbridge, which draws a lot of current. This will cause under-voltage on
|
|
most SPI flashers, so do not use the 3.3V rail from your flasher. Do not
|
|
connect +3.3V to the chip. Instead, turn the board on and then turn it off by
|
|
holding the power button. With the board powered down, but plugged in, there
|
|
will be a 3.3V supply from the ATX PSU. You can then flash, but DO NOT connect
|
|
the +3.3V supply from your SPI flasher!
|
|
|
|
NOTE: You should use a resistor in series, between 1K to 10K ohms, for the 3.3v
|
|
connection to the CS pin. This is to protect from over-current.
|
|
|
|
Here is an image of the flash chip:\
|
|
|
|
|
|
Internal flashing is possible. Boot with the proprietary BIOS and
|
|
GNU+Linux. There are 2 flash chips (one is backup).
|
|
|
|
Flash the first chip:
|
|
|
|
./flashrom -p internal:dualbiosindex=0 -w libreboot.rom
|
|
|
|
Flash the second chip:
|
|
|
|
./flashrom -p internal:dualbiosindex=1 -w libreboot.rom
|
|
|
|
NOTE: you can still boot the system with just the main flash chip
|
|
connected, after desoldering the backup chip. This has been tested while
|
|
libreboot was already installed onto the main chip.
|
|
|
|
NOTE: If you don't flash both chips, the recovery program from the default
|
|
factory BIOS will kick in and your board will be soft bricked. Make sure that
|
|
you flash both chips!
|
|
|
|
NOTE: You need the latest flashrom. Just get it on flashrom.org from
|
|
their SVN or Git repos.
|
|
|
|
NOTE: due to a bug in the hardware, the MAC address is hardcoded in
|
|
coreboot-libre. Therefore, you must set your own MAC address in your
|
|
operating system.
|