"Cesar Soto G." wrote in message news:3CF133AA.25C01455@vtr.net... > > Hi, I have Apple IIc, and I want connect to Mac with MacAdt > Software, to transfer disk images to 5 1/4 floppy disks from Mac > I found many instruction in Faqs for PC conecction whit Null-Modem Cable > but What cable can I use to do Apple IIc <---> MacADT transfers? > Can I Make this Cable? > How, pins diagrams? > I made one of those some years ago. Here is what I've got on it: Handshaking Cable IIc DIN-5 Modem DB-25 Male 1-------------------4 RTS 1 2-------------------2 TxD 3 3-------------------7 Gnd 4 4-------------------3 RxD 5 5-------------------5 CTS 2 Without Handshaking IIc DIN-5 Modem DB-25 Male MiniDin IIc Plus 1-------------------20 DTR-------------------------1 2-------------------2 TxD -------------------------3 3-------------------7 Gnd ------------------------4 4-------------------3 RxD -------------------------5 5-------------------6 DSR or Pin 8, DCD. ---------2 I'm pretty sure the info on the IIc Plus is good, because I figured it out myself and made a working cable. I'm less sure of the IIc info. I remember it was a challenge. I wasn't too worried about getting a fast connection, since the files are small and I was just working with floppies anyway. -Paul "Cesar Soto G." wrote in message news:3CF2A9B8.57972234@vtr.net... > Thanks Paul, but is possible build this cable directly > whitout DB-25 connectors or adapters, for a Power Mac, > Din5M / MDin8M? > Yes. I just verified that the process detailed below works. It may not be the best, but it does work. To verify operation, start typing, and the words should appear on the other computer's screen. I initiated an Xmodem transfer from the sending computer, then started the receiving process on the other. Tried it both directions, and it worked. I was able to unshrink a file on the IIc that I transferred from a ProDos disk on the Mac to the IIc using this method. The setup details: Mac Color Classic upgraded to "Mystic" with 040 motherbd. System 7.5.5. Comm prog: Zterm set to 8N1, 2400bps, no handshaking. Apple IIc running ProDos Comm prog: Zlink set to 8N1, 2400 bps. Cable: Apple IIc to Imagewriter II, homemade. Made from a cable cut from a PC keyboard spliced to Mac printer cable, one end cut off. Note to purists: See? Macs and PC's can be useful... as a source of parts for Apple II's. ;-)) This cable can also be purchased pre-made. Pinouts: IIc DIN 5 (male) Mac mini-DIN 8 (male) 1 ------------------------- 1 2 ------------------------- 3 3 ------------------------- 4 4 ------------------------- 5 5 ------------------------- 2 My notes have a sketch of the wiring. Unfortunately, I didn't note the perspective- whether I'm looking at the outer ends or the inner ends where I'm soldering. I'm pretty sure it's viewing the external ends. I stripped the ends of the wires and used a continuity tester to find which wire was connected to which pin, and noted the wire color by the pin. Then I soldered the appropriate wires together and made sure it worked before taping it up. You can print this out and sketch in the connections per the table above: Mac end: 6 7 8 3 4 5 1 2 IIc end: 5 1 4 2 3 Hope this helps. -Paul