[time-nuts] Re: Ryzen mobos with serial port for Garmin GPS?

[Rich Wales]

Darren Freeman wrote:

> /That's not really been my experience, they just moved it to a header. 
> You will need to supply a DE9 to ribbon cable, say on a bracket, or 
> installed in a cutout elsewhere in the case./

Some motherboards do indeed have a serial (COM) header, but I've 
encountered quite a few that do not.  I don't think this can be taken 
for granted -- gotta check the specific mobo or its manual.

> /This is the first one that I checked, and it has such a port labelled 
> COMA, along the left/bottom edge. 
> https://www.gigabyte.com/Motherboard/B450-AORUS-M-rev-1x/sp#sp/

Thanks for this mobo suggestion.  I'll keep it in mind.

> /Also note that the Linux PPS driver supports the standard PC parallel 
> port, which you can usually find as a header. If you are having 
> performance issues with one, try the other. (But you may need to 
> supply negative-going edges to the parallel port.)/

Thanks.  I see that this particular Gigabyte mobo which you suggested 
has a parallel (LPT) port, but my impression has been that parallel 
ports are really becoming rare (more so than serial ports), considering 
that most printers nowadays use USB or Ethernet (or sometimes WiFi).

*Rich Wales*
richw at richw.org