serial port apple 2c

[Marius Diepenhorst (pokey)]

Hmmm some reactions, but unfortunately not very handy for me :-((

The only thing I have is a printer cable (5pin DIN -> 25 pin rs232)...

I tried to connect a pc with a PC-nullmodemcable connected to that 25pin
rs232 printer slot, but it didn't work at all (!).

I like to know the pinout of that 5 pin serial port of the Apple 2c... who
knows?

And isn't the printer-cable 'compatible' with a stock apple-2c-modemcable?

Greetz. Marius

[Jm]

Read the other messages....there's another thread going on right now
about 2c serial ports.

[bharrisn...@vax2.winona.msus.edu]

One would think that the printer cable and the modem cable for the Apple
IIc would be the same, since they both use a serial interface.
Since I don't have a IIc, I don't have any manuals with the Apple IIc's
pinouts. However, they should be the same as a Laser 128. Here is the
pinout for the 128's serial interface.

----
/ \ 1. DTR - data terminal ready to
2. TD - transmit data
|o 5 1o| 3. ground
o 4 2o 4. RD - receive data
\ o3 / 5. DSR - data set ready
----

Since my (PC) computer has a db9 port for a serial port, I don't have a
diagram for you. However the pinouts for the 25 pin port should be:

8 DCD (Data Carrier Detect)
3 RX (Receive Data)
2 TX (Transmit Data)
20 DTR (Data Terminal Ready)
7 GND (Signal Ground)
6 DSR (Data Set Ready)
4 RTS (Request To Send)
5 CTS (Clear To Send)
22 RI (Ring Indicator)

So, I believe...
Apple IIc (5pin) IBM (25 pin)
1<--------------->6
2<--------------->3
3<--------------->7
4<--------------->2
5<--------------->20
... should do it. Then you'd a copy of ADT, or teminal
programs on both ends to do the transfer. ADT can be found here:
ftp://mirror.apple.asimov.net/pub/apple_II/utility/adt121.zip

Hope this helps.

[David Empson]

<bharrisn...@vax2.winona.msus.edu> wrote:

> One would think that the printer cable and the modem cable for the Apple
> IIc would be the same, since they both use a serial interface.

Except that a printer and modem have different pinouts for their RS-232
connector, hence you need to swap at least two signals in the serial
cable, and probably four.

> Since I don't have a IIc, I don't have any manuals with the Apple IIc's
> pinouts. However, they should be the same as a Laser 128. Here is the
> pinout for the 128's serial interface.
>
> ----
> / \ 1. DTR - data terminal ready to
> 2. TD - transmit data
> |o 5 1o| 3. ground
> o 4 2o 4. RD - receive data
> \ o3 / 5. DSR - data set ready
> ----

This is the same as the IIc, but it is important to note that this
numbering is valid when looking into the back of the IIc, i.e. the face
of the female connector, or the back of the male plug.

> Since my (PC) computer has a db9 port for a serial port, I don't have a
> diagram for you. However the pinouts for the 25 pin port should be:
>
> 8 DCD (Data Carrier Detect)
> 3 RX (Receive Data)
> 2 TX (Transmit Data)
> 20 DTR (Data Terminal Ready)
> 7 GND (Signal Ground)
> 6 DSR (Data Set Ready)
> 4 RTS (Request To Send)
> 5 CTS (Clear To Send)
> 22 RI (Ring Indicator)
>
> So, I believe...
> Apple IIc (5pin) IBM (25 pin)
> 1<--------------->6
> 2<--------------->3
> 3<--------------->7
> 4<--------------->2
> 5<--------------->20
> ... should do it.

I concur.

--
David Empson
dem...@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand