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README.md: minor clarifications

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Martin Kepplinger 6 years ago
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@ -11,6 +11,11 @@ See our [releases](https://github.com/merge/coreboot-x230/releases)
* Lenovo's proprietary VGA BIOS ROM is executed in "secure" mode * Lenovo's proprietary VGA BIOS ROM is executed in "secure" mode
### coreboot
* We simply take coreboot's current state in it's master branch at the time we build a release image.
That's the preferred way to use coreboot. The git HEAD we use it always included in
the release.
### Intel microcode ### Intel microcode
* version [20180108](https://downloadcenter.intel.com/download/27431/Linux-Processor-Microcode-Data-File) * version [20180108](https://downloadcenter.intel.com/download/27431/Linux-Processor-Microcode-Data-File)
* in 20180108, for the X230's CPU ID (306ax) the latest update is 2015-02-26 * in 20180108, for the X230's CPU ID (306ax) the latest update is 2015-02-26
@ -72,7 +77,7 @@ the 8MB chip above:
## Flashing the coreboot / SeaBIOS image ## Flashing the coreboot / SeaBIOS image
When __upgrading__ to a new version, for example when a new [SeaBIOS](https://seabios.org/Releases) When __upgrading__ to a new version, for example when a new [SeaBIOS](https://seabios.org/Releases)
version is available, only this has to be done.
version is available, only the "upper" 4MB chip has to be written.
Download the latest release image we provide here and flash it: Download the latest release image we provide here and flash it:
@ -83,6 +88,7 @@ Download the latest release image we provide here and flash it:
We flash externally, using a "Pomona 5250 8-pin SOIC test clip". You'll find We flash externally, using a "Pomona 5250 8-pin SOIC test clip". You'll find
one easily. one easily.
### Example: Raspberry Pi 3
We connect it to a Raspberry Pi 3, running [Raspbian](https://www.raspberrypi.org/downloads/raspbian/) We connect it to a Raspberry Pi 3, running [Raspbian](https://www.raspberrypi.org/downloads/raspbian/)
and the following setup and the following setup
* [Serial connection](https://elinux.org/RPi_Serial_Connection) using a "USB to Serial" Adapter and picocom or minicom * [Serial connection](https://elinux.org/RPi_Serial_Connection) using a "USB to Serial" Adapter and picocom or minicom
@ -119,7 +125,8 @@ and the following setup
Edge (closest to you) Edge (closest to you)
Now you should be able to run the above mentioned `flashrom` commands.
Now you should be able to copy the image over to your Rasperry Pi and run the
mentioned `flashrom` commands.
## How we build ## How we build
Everything necessary to build coreboot is included in this project and building Everything necessary to build coreboot is included in this project and building


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