DIN6F (female) looking at the cable:

    __ __
   /  U  \
	/ 5   1 \
	|   6   |
	\ 4   2 /
	 \  3  /
	  -----

1 & 2: ~6V VAC



8-pin round cable is called 8-pin MiniDIN
Pinout is: (male version)

  __ __
 /  U  \
/ 8 7 6 \
| 5  4 3 |
\  2 1  /
 \     /
  -----

It's RJ45 on the other end
GND == 7   (brown + white)
5V == 8    (brown)
TXD == 3   (blue + white), only as RS232

It works! Powers on, prints "Hello World".

** I am using 4.7 uF capacitors, which the datasheet does _not_ endorse. Capacitance range specified is 0.1 uF - 1 uF.

THIS WORKS ON 5V USB MacBook Pro port. Omg



????????????????????

// Copied from the manual

1. DCD (tied to pins 4&6)
2. NC
3. TXD from PC
4. DTR (tied to pins 1&6)
5. Ground
6. DSR (tied to pins 1&4)
7. RTS (tied to pin 8)
8. CTS (tied to pin 7)
9. NC