What cable can I use to do Apple IIc <---> PC ADT transfers?
Below is the pinout for a IIc NULL modem cable for use with the ADT disk image transfer utility. It shows signal names and signal directions. Both 9 and 25-pin numbering is shown for the PC connector end. For the IIc plug, DIN-5 pin numbers are listed with traditional Apple pin numbers in parenthensis … DIN-5M Dsub9 or Dsub25 (Apple) 9 pins 25 pins 4 (2) TXD –> 2 RXD 3 RXD 5 (4) RXD <-- 3 TXD 2 TXD 2 (3) GND --- 5 GND 7 GND 1 (1) DTR --> 6 DSR –,* 6 DSR –,* 1 DCD –‘ 8 DCD –‘ 3 (5) DSR/DCD <-- 4 DTR 20 DTR * pins connected by a jumper Usual Apple numbering for a male cable connector (plug) as viewed looking at the pins from the front is ... 1 5 2 4 3 Whether the PC Dsub connector is male or female depends upon what it needs to plug into. ------------------------- From: Aage Rettvin I constructed a new shielded five-lead cable with the above pin assignment setup for a Dsub25 plug with the correct jumpering of pins 6 and 8. This cable design basically corresponds to the wiring for
