Inet 86vs

This is not very good device for use with Linux. Problem booting device with manufacturer provided fex and current sunxi kernel. Poorly supported gsl1680 touchscreen - some driver exists but does not work correctly on all devices and relies on extracting firmware blobs from android which are so far not well understood.

Camera and wifi support unknown.

Poor wifi antenna.

= Identification =

In android, under Settings->About Tablet, you will find:
 * Model Number: MID705
 * Build Number: A13_86VS_M758C1_1304117.20130629

= Sunxi support =

Current status
Partial support.

Images
Works with Olinuxino A13 images (not full support - olinuxino has fewer peripherials).

A13 Debian 4GB SD-card image release-9



Manual build

 * For building u-boot, use the "" target.
 * The .fex file can be found in sunxi-boards as MANUFACTURER_DEVICE.fex

Everything else is the same as the manual build howto.

= Tips, Tricks, Caveats =

meminfo
dram_clk         = 408 dram_type        = 3 dram_rank_num    = 1 dram_chip_density = 4096 dram_io_width    = 16 dram_bus_width   = 16 dram_cas         = 9 dram_zq          = 0x56b9697b dram_odt_en      = 0 dram_tpr0        = 0x42d899b7 dram_tpr1        = 0xa090 dram_tpr2        = 0x22a00 dram_tpr3        = 0x0 dram_emr1        = 0x4 dram_emr2        = 0x10 dram_emr3        = 0x0

FEL mode
The VOL+ button triggers FEL mode.

Alternatively, there is a pad called u-boot near the wifi. Connecting this to ground also triggers FEL mode. Pads for a UBOOT button are also available on the board.

= Adding a serial port (voids warranty) =



Some pads are available on the board, but they are multiplexed with the SD card. So use a MicroSD Breakout board. The ones from Sparkfun or DX should work with the cover on, but you have to remove the back cover to attach the cubietech one.

Device disassembly
Be careful to first remove the SD Card.

The tablet has screws next to the connectors. The board is on the display part and the bottom cover is removed. Remove the screws and pry the bottom cover open with your plastic tool.

Make sure the USB port is inserted into the cover first when reassembling.

Locating the UART
UART is marked on the bottom of the PCB (between the PCB and display) and on the top under the tape holding ctp connector. Both connect to the SD slot so you can as well use a SD breakout board. The FEX file does not enable UART.

UART1 pins are used for CSI and connected to a 24pin 0.5mm pitch FFC connector which is used for camera. Probing with a multimeter confirms that the console pins seem to be connected somewhere around the middle of the connector. The pitch is the same as IDE ZIF connector but IDE is 40pin.

It is possible to use a generic ffc and an IDE ZIF to 3.5" adaptor to connect to the pins routed to CSI. I can confirm using the u-boot gpio command that the pins actually connect to the ide connector when the cable is inserted properly but I cannot get the console working. Unfortunately the 24pin cable gets loose easily in 40pin connector.

= Pictures =

=Also known as=

Rev1.0 was marketed as
 * Manta MID701 (Device Disassembly)
 * Polaroid MIDC407

Rev2.0 (documented) was sold as:
 * Manta MID705
 * Lenco CoolTab 70

= See also =