Tegra/Boards/Toshiba AC100

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Toshiba's AC100 was an Android laptop built around NVIDIA Tegra20 (Tegra 2). It was primarily sold in Europe and Japan. It is no longer available for purchase, although now and then, one will turn up on eBay.

Plain Linux (rather than Android) has been ported to the AC100 by enthusiasts.


Picture of the AC100


The board exposes connectors for:

  • Power in
  • SD card
  • USB A host
  • USB mini-A device (note: mini A not micro B as is typical) (recovery port)
  • HDMI
  • Analog headset (headphone/mic)

The board has the following devices on-board:

  • NVIDIA Tegra20 (Tegra 2)
  • 512MB RAM
  • eMMC (size varies depending on model)
  • LCD panel
  • Keyboard, touchpad, and nvec system microcontroller
  • PMIC and RTC (I'm not sure if it's battery-backed)
  • Some models contained a USB WWAN card

Mainline Status

All of mainline U-Boot, Linux, and tegra-uboot-flasher support Beaver.

Toshiba has not supported the effort to port mainline Linux and U-Boot to the AC100. For that reason, the board is known as the Compal PAZ00 in mainline software, in an effort to dissociate the mainline effort from Toshiba. Compal is the ODM that actually built the AC100, and PAZ00 appears to be their code-name for it.

Downstream Status

The AC100 was a consumer device and originally shipped with Android. There is no downstream generic Linux port.

Entering USB Recovery Mode

The AC100 does not have the typical (for Tegra development boards) "Force Recovery" button. However, the embedded micro-controller (known as nvec) can simulate this feature.

  • Ensure a USB cable is connected from your host system to the USB mini A recovery connector on the board.
  • Turn off the system. If the SW is not responsive, this may involve holding the power button for about 10 seconds. If you are successful, then the power LED will turn off, typically AFTER the power button is finally released.
  • Press and hold both the CTRL and ESC keys on the keyboard.
  • Press and release the power button to turn the system on.
  • Wait a short time (e.g. a few seconds) and release the CTRL and ESC keys.

Retro-fitting a Serial Console

See http://ac100.grandou.net/serial_port_modification.