Compatibility of serial adapters

[Samuel Greenfeld]

If I recall correctly, the XO-1.5's serial adapter shares some circuitry
with the camera.  Booting an XO-1.5 with a serial adapter means you cannot
use the latter.

To do this, the XO-1.5 looks for a resistor placed across two of the wires
to see if a serial adapter is present.  No other XO laptop model has this
restriction.

Perhaps the older serial adapter simply lacks the sense resistor required
for the XO-1.5 to switch modes.



On Wed, Oct 21, 2015 at 5:15 PM, James Cameron <quozl at laptop.org> wrote:

> On Wed, Oct 21, 2015 at 11:38:02AM -0500, Peter Easthope wrote:
> > Seems that an adapter such as http://www.ebay.ca/itm/381346598663 ,
> > similar to the first generation adapter, might work.  [...]
>
> Doubt it.  The product description is inadequate, it does not state
> the serial voltage.  It does say supply voltage range.  It does not
> have any serial control signal strapping.  And it has an RS232
> connector, which nobody should need these days.  ;-}
>
> Get a USB adapter instead.  As long as the adapter is for 3.3V serial,
> it will work with the XO-1 host serial port.  The adapter is powered
> from the USB host.
>
> The same seller has a more appropriate adapter for a lower price:
>
>
> http://www.ebay.com/itm/USB-TTL-Converter-Module-LED-CP2102-RX-TX-3-3V-5V-Output-/381153344387?hash=item58be827b83
>
> There are now very many alternative adapters that are compatible.
>
> --
> James Cameron
> http://quozl.linux.org.au/
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>
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