Compatibility of serial adapters
samuel at greenfeld.org
Wed Oct 21 19:52:40 EDT 2015
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
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:
> There are now very many alternative adapters that are compatible.
> James Cameron
> Devel mailing list
> Devel at lists.laptop.org
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