How (not) to make a PC serial (DB9) to //c+ (mini-din8) cable

[Chris Merrill <chris@nowhere.net>]

In my continuing quest to get ADT working with my  //c+, I have made a
cable that does not work.  

I connected the following wires:
PC (db9)          //c+ (mini-din8)
---------------        -------------------------
  DSR (6)              DTR (1)
  DTR (4)              DSR (2)
  RxD (2)              TD (3)
  TxD (3)               RD (5)
  G (5)                   G (4, 6, 8)

I'm using Hyerterm on Win2k, with the same settings that work fine
with a //e and SSC.

On the //c+, I boot (no DOS) and enter IN#2 and PR#2.
Typing in the PC terminal window does not echo anything to the screen
of the //c+...nor does anything from the //c+ screen show up on the
PC.

 Is the built-in serial card on a //c+ mapped to slot 2?

Anyone know what I'm doing wrong?

TIA,
Chris

PS - here are the PIN diagrams I'm working from:

I found the following pinout diagram (don't remember where...) for the
mini-din8 connector for the //c+ serial port:

    ----v----
   / o  o  o \
  /  8  7  6  \
 | o   o    o  |
 | 5   4    3  |
  \   o   o   /
   \  2   1  /
    ---------   

1	DTR		green
2	DSR		yellow
3	TD		purple
4	G		black
5	RD		orange
6	G		blue
7	n/a		brown
8	G		red

I also found the following for a PC serial port (db9) connector:

 ------------------
 \ 5  4  3  2  1  / 
  \  9  8  7  6  /
   --------------

1	DCD		black
2	RxD		brown
3	TxD		red
4	DTR		orange
5	G		yellow
6	DSR		green
7	RTS		blue
8	CTS		purple
9	RI		grey