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

[jon@i-manila.com (Jon Co)]

arent there 2 serial ports on thr //c+? the printer & modem port?  I
used a serial printer cable on my //c's modem port (mapped to slot 2)
and it works like a charm.  Try to search the net for mac-pc null
modem cable pinouts as the //c+'s mini din jacks are identical to
macs' serial ports.  I do wonder if the serial chip used in the //c+
is like the //c's and //e's SSC compatible chip.  The //c+ was
originally supposed to be made a portable IIGS if I remember right and
they might have used instead an SCC like the ones on IIGS's and macs. 
Incidentally there is a version of ADT for SCC based ports, and I have
been unable to get it to work beyond 9600 on my IIGS.
Chris Merrill <chris@nowhere.net> wrote in message news:<9t5g4vo2rbfl372j6tlia0qvr9a0d1droh@4ax.com>...
> 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