Qisda ES900

Qisda ES900 is a discontinued electronic-book reader developed by Qisda Corporation and based on a Linux platform. The device is sold under various brand names worldwide.

Qisda ES900
DeveloperQisda OEM/ODM AUO Optronics
ManufacturerQisda OEM/ODM[1][2]
Typee-book reader
Release date2011 (2011)
Operating systemLinux UI Engine QT embedded 4.5.1
OS: Linux 2.6.21
CPUSamsung S3C2416 ARM9 @ 400MHz
Memory128 MB (MDDR),
StorageInternal: 2GB (NAND)
External: microSD/microSDHC
Display9-inch (230 mm) SiPix
Graphics1024 × 768, 150 ppi density,
16 levels of grayscale
Soundbuilt-in speakers (0.5W)
Inputtouchscreen, 7 keys
TouchpadCapacitive
ConnectivityWi-Fi b/g, microUSB high speed, audio jack
Optional: 3.5G HSDPA
Power1530 mAh, 3.7 V
Dimensions166.9 × 227.8 × 10.5 mm
Mass487 gram (without Wi-Fi)
PredecessorQisda ES600

Features

Qisda ES900 provides a 16 levels of grayscale SiPix touchscreen display for viewing digital content. Pages are turned using the buttons on the device or touchscreen. The ES900 connects to the internet through available Wi-Fi connections. Users can read books without a wireless connection. Disconnecting the wireless connection can prolong the battery life.

Specifications
CPU[1][2]
OS
Memory
Connectivity
  • Wi-Fi b/g
    Optional: 3.5G HSDPA
  • microUSB high speed
  • audio jack
Miscellaneous
  • 1530 mAh, 3.7 V
  • 487 gram (without Wi-Fi)
  • Reading mode
  • > 10.000 pages (Wi-Fi off)

Formats supported
Text
Picture
Audio

Sold as

The device is sold worldwide under various brand names.

Asia
  • Taiwan: Asus Eee Reader DR900 / TZ900[3]
Europe
  • Asus Eee Reader DR900 / DR950
  • bq Avant XL[4]

Modification

Being that the hardware utilizes Linux-based software it can be changed or improved to the owners content. The firmware is labeled as “QT Software” and varies from vendor to vendor. The upgrade contains multiple image files with the .img extension, along with other system files.

Flashing to upgrade the firmware can be taken advantage of as it does not seem to check if the version that is being installed is older. Due to this, using firmware made by the other vendors on the model each sold in particular is possible.

Dual-boot

The devices seem to contain a native dual-boot capability. When a device specific key combination is pressed during power-on any linux-kernel + ramdisk combination is booted from the sd-card.[5]

References
  1. "9 inch, 16 gray level, 2G Ebook Reader with Wi-Fi/Touch SiPix Solution". Media Federal Co., Ltd. Retrieved 14 May 2011.
  2. "9 inch Ebook Reader Device (AUO SiPix Solution)". Alibaba.com Hong Kong Ltd. Retrieved 14 May 2011.
  3. Asus. "Specifications Asus Eee Reader DR900". ASUSTeK Computer, Inc. Retrieved 14 May 2011.
  4. "bq Avant XL". Mundo Reader, S.L. Retrieved 14 May 2011.
  5. "oyo-hack/Booting". Archived from the original on 23 April 2011. Retrieved 22 May 2011.
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