Todos reader

duma off/on/card pilot off/on/card
TD  0/0/0 X/0/0
RD  1/0/0 1/0/0
RTS 0/1/1 X/X/X clock
CTS 1/1/0 1/1/0 card present
DSR 0/0/0 0/0/0
DTR 0/1/0 X/1/1 reset

Pilot on

TD  
RD  0
RTS 
CTS 1
DSR 1
DTR 

Todos card present

TD  
RD  0
RTS 
CTS 1
DSR 0
DTR 

Pilot <-> Todos
RD  <-> TD
TD  <-> RD
GND <-> GND
RTS <-> CTS
CTS <-> RTS
        DSR <-> DTR

2-3
3-2
5-5
7-8
8-7
  4-6

Todos DTR resets the card; normally low...
push button?
normal -> Todos DSR (always low)
pressed -> Pilot DSR (always high)
