From: Gary Kratochvil Subject: Apple //e to PC Null modem cable pinout Date: Monday, June 21, 1999 6:45 PM Please respond by email as well as the group. My news provider has been very poor the last week. I have an Apple //e with Super Serial Card and need to go to my 9 pin serial port on my PC. I have the following information from Rubywand from an earlier message. > According to the "Modem Works" manual, there is a special modem cable > recommended for connecting to a Super Serial Card to get hardware handshaking flow > control: > > SSC side Modem side > 25-pin Dsub 25-pin Male Dsub > > 2 -------> 2 > 3 <------- 3 > 4 -------> 4 > 5 & 8 <--- 5 > 6 <------- 8 > 7 <------> 7 > 20 ------> 20 I do have the SSC card for the Apple so I'm assuming I use the pinout above and the "Modem side" is my PC. I have a 9 pin serial port on the PC. I also have a 25 to 9 pin adapter to use. Does "5 & 8 <--- 5" mean I need to jump 5 & 8 to 5? I've read the info in the FAQ's about the dip switch settings for the SSC. On SW1 and SW2 there is 1-8 on one side of the switch and "open" on the other. Does the dip switch set to "open" mean on? What transfer rate is max? I don't think I have an accelerator chip so am I maxed at 4800? I also have pinout information for a 25 to 9 pin cable from Teodor Angeloff who wrote the Apple Oasis program. His suggestion for the cable construction is below. I don't understand some of the symbols used. Can someone please clarify? Here is the Null Modem connection: PC (DB-9) Apple*(DB-25) RxD (2) ---------------------- TxD (2) TxD (3) ---------------------- RxD (3) GND (5) ---------------------- GND (7) I understand the part above but not the part below. RTS (7) --\ /-- RTS (4) CTS (8) --/ \-- CTS (5) CD (1) --\ /-- DSR (6) DSR (6) --+ +-- DTR (20) DTR (4) --/ \-- CD (8) I don't understand the "--\ /-- --+ +--" notations. Does this mean something other than connecting pin 7 to pin 4 in the first line? Thank you for your time, Gary