'' Re: [Open-graphics] A really good immediate use for OGD1: PCI bus analyzer

[Daniel Rozsnyó]

Timothy Miller wrote:
> On 1/3/07, Daniel Rozsnyó <daniel at rozsnyo.com> wrote:
> 
>> Or you can implement PnP over serial port as the mices do :-)
> 
> How does that work?
> 

In short: playing with the signal lines in a described way will force
the device to identify itself (data then goes to pc as 1200-7-n-1)

Here is the full specification:

http://www.osdever.net/documents/PNP-ExternalSerial-v1.00.pdf?the_id=52
(or google for: pnp com enumerator / pnp external com device)

It's a Microsoft spec, supported by Windows OS. To Linux I've found only
reference which states not yet supported:

	http://tldp.org/HOWTO/Plug-and-Play-HOWTO-8.html#ss8.4

Daniel.