Suche Apple //c Druckerkabel DIN 5polig auf DB25

011 //c (5-pin) serial port and modem cable pinouts.      .to.top 
(Most of this is from a post by David Empson.) 


     Din 5 
 //c Serial Port 
 (Female) Socket 

   5       1 
    4     2 
       3 

The functions are: 

1  Handshake Out (nominally DTR) 
2  Data Out (TxD) 
3  Ground 
4  Data In (RxD) 
5  Handshake In (nominally DSR) 
  

     Din 5 
//c Serial Cable 
  (Male) Plug 

   1       5 
    2     4 
       3 

To wire up a IIc to a simple modem without hardware handshaking, use 
the following pinout: 

IIc     Modem 
DIN-5   Dsub-25M 
1 ----- 20 DTR 
2 ----- 2  TxD 
3 ----- 7  Gnd 
4 ----- 3  RxD 
5 ----- 6  DSR   (you might want to use pin 8, DCD in some cases) 

The IIc cannot do hardware handshaking very well, but this is as close 
as you can get: 

IIc     Modem 
DIN-5   Ddub-25M 

1 ----- 4  RTS 
2 ----- 2  TxD 
3 ----- 7  Gnd 
4 ----- 3  RxD 
5 ----- 5  CTS 

The IIc's handshaking lines have annoying side effects, which cause 
problems with hardware handshaking: 

1. The "Handshake Out" signal is implemented to mean "I want to send 
   data" (the official and original meaning of RTS).  If you turn off 
   the output handshake line, the IIc will stop sending data.  For a 
   hardware handshaking modem, RTS is supposed to mean "You are allowed 
   to send me data" (from the computer's point of view). 

   If the computer tells the modem to stop transmitting, the computer 
   will also be unable to transmit.  This will reduce the rate at which 
   data can be transferred bidirectionally, but doesn't cause any other 
   problems. 

2. The "Handshake In" signal is implemented to mean "There is receive data 
   present" (the official meaning of DCD).  If the incoming handshake line 
   is disabled, the IIc will stop receiving data (ignore any data on RxD). 
   For a hardware handshaking modem, CTS is supposed to mean "You are 
   allowed to send me data" (from the modem's point of view). 

   If the modem tells the computer to stop transmitting, the computer will 
   also be unable to receive, and will discard any data sent by the modem 
   while CTS is not active.  This can cause screen corruption and loss of 
   data blocks or acknowledgements during a file transfer, which will 
   require retransmission.   It is only likely to be a problem while a 
   lot of data is being sent, so is more likely to cause problems 
   during a file upload than a download. 

   If the comms software is quick enough, it can drop RTS immediately when 
   CTS is lowered, which will prevent the modem from sending any more data. 

You will need the //c System Utilities disk to set up the serial port 
speeds, or a comm program that overrides them anyway. 

Max speed is 9600.