What kind of cable should I use to connect a modem to my IIc?
Here is the pinout of the IIc serial port looking at the back of the computer: DIN-5F (female) socket with Apple’s numbering 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) To connect a IIc to a typical modem use the following pinout for a non-hardware handshaking cable: IIc Modem DIN-5M Dsub-25M DIN-5 Dsub-25M plug male connector 1 Handshake Out 20 DTR 2 Data Out 2 TxD 1 5 ,——–/ /———. 3 Ground 7 Gnd 2 4 \ 1 2 … 12 13 / 4 Data In 3 RxD 3 \ 14 … 25 / 5 Handshake In 6 DSR* `——/ /——-‘ *You might want to use pin 8, DCD in some cases. To connect a IIc to a modem with a 9-pin connector you can use the pinout below for a non-hardware handshaking cable: IIc Modem DIN-5M Dsub-9M DIN-5 Dsub-9M plug male connector 1 Handshake Out 4 DTR 2 Data Out 3 TxD 1 5 ,——–/ /———. 3 Ground 5 Gnd 2 4 \ 1 2 … 4 5 / 4 Data In 2 RxD 3 \ 6 … 9 / 5 Handshake In 6 DSR* `——/ /——-‘ *You m
