29 Dec
2013
29 Dec
'13
7:26 p.m.
>
There are two mutually incompatible common pinouts for those connectors,
> and 10*9! (factorial) possible pinouts.
On Sat, 28 Dec 2013, Tony Duell wrote:
Isn't 10*9! = 10!?
Yes, it is.
There are 9! arrangements for a DE9 (and many more for a DB9!), times 10
choices for which of the 10 pin connector is unused.
OR, 10! arrangements of the 10 pin connector, with one of those 10 being
not connected to the DE9.