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Apply little birdie suggestions
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nathan-contino authored Nov 26, 2024
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11 changes: 5 additions & 6 deletions documentation/asciidoc/computers/raspberry-pi/boot-eeprom.adoc
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The following Raspberry Pi models use an EEPROM to boot the system:

* Flagship models since 4
* Compute Module models since 4 (including Compute Module 4S)
* Keyboard models since 400
* Flagship models since Raspberry Pi 4
* Compute Module models since CM4 (including CM4S)
* Keyboard models since Pi 400
All other models of Raspberry Pi computer use the `bootcode.bin` file located in the boot filesystem.

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There are multiple ways to update the bootloader of your Raspberry Pi.

==== Flagship models since 4; Compute Modules since 5; Keyboard models since 400
==== Flagship models since Raspberry Pi 4; Compute Modules since CM5; Keyboard models since Pi 400

Raspberry Pi OS automatically updates the bootloader for important bug fixes. To manually update the bootloader or change the boot order, use xref:configuration.adoc#raspi-config[raspi-config].

NOTE: Compute Module 4 and Compute Module 4S do not support automatic bootloader updates because the bootrom cannot load the `recovery.bin` file from eMMC.
The recommended update mechanism is `rpiboot` or via `flashrom` - see `rpi-eeprom-update -h` for more information.
NOTE: Compute Module 4 and Compute Module 4S do not support automatic bootloader updates because the bootrom cannot load the `recovery.bin` file from eMMC. The recommended update mechanism is `rpiboot` or via `flashrom` - see `rpi-eeprom-update -h` for more information.

[[imager]]
==== Use Raspberry Pi Imager to update the bootloader
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If `1` then `sudo halt` will run in a lower power mode until either GPIO3 or GLOBAL_EN are shorted to ground.

This setting is not relevant on Flagship models since 5, Compute Modules since 5, and Keyboard models since 500 because the xref:raspberry-pi.adoc#power-button[dedicated power button] may always be used to wake from `HALT` or `STANDBY`.
This setting is not relevant on Flagship models since Raspberry Pi 5, Compute Modules since CM5, and Keyboard models since Pi 500 because the xref:raspberry-pi.adoc#power-button[dedicated power button] may always be used to wake from `HALT` or `STANDBY`.

Default: `1`

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On Raspberry Pi 5 this places the PMIC in `STANDBY` mode where all outputs are switched off. There is no need to set `WAKE_ON_GPIO` and pressing the xref:raspberry-pi.adoc#power-button[dedicated power button] will boot the device.

Default: `1` on Compute Modules since 5 and Keyboard models since 400; otherwise `0`
Default: `1` on Compute Modules since CM5 and Keyboard models since Pi 400; otherwise `0`

[[BOOT_ORDER]]
==== `BOOT_ORDER`
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In order to detect the keyboard, network install must initialise the USB controller and enumerate devices. This increases boot time by approximately 1 second so it may be advantageous to disable network install in some embedded applications.

Default: `1` on Flagship models since 4 and Keyboard models since 400; `0` on Compute Modules since 4 (including Compute Module 4S).
Default: `1` on Flagship models since Raspberry Pi 4 and Keyboard models since Pi 400; `0` on Compute Modules since CM4 (including CM4S).

[[NET_INSTALL_AT_POWER_ON]]
==== `NET_INSTALL_AT_POWER_ON`
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