On Wed, 30 Jul 2003 16:11:40 -0700, "Paul Grammens" wrote: > >"Chris Morse" wrote >> SNIP >> >> I got a mini DIN-8 to DB25 "high speed" modem cable from Intrec along >> with a copy of ProTERM. >> SNIP >> >> // CHRIS >> > >The IIc+ serial port is not exactly the same as a IIgs or Mac serial port, >even though it uses the same connector. > >Here is a pinout I used to make a cable which worked: > >IIc+ DB-25 >2 20 >5 2 >4 7 >3 3 >1 (show no connection, but maybe pin 6) > >-Paul Hiya Paul, I was reading on their site about doing file transfers -- I think maybe the quick solution to my problem is getting a copy of an Apple IIGS To Printer serial cable, which is supposed to pass off as a null modem cable. Anyhow, here's what I came up with. This is using the "MultiSpeed Modem Cable" from Intrec.com which I got at the same time I purchased a copy of ProTERM A2 v3.1. I used a digital ohm-meter to test all the pin connections. This is how the "Multi-Speed Modem cable" is wired, along with the //c+ serial port pin info taken directly from my copy of the Apple IIc Technical Reference Manual, 2nd Edition: Guess I'll make a trip up to CompUSA and try to get that printer cable. Would be nice if I didn't have to frankenstein a cable together. Cheers! // CHRIS [View with fixed-pitch font to preserve ASCII Art diagrams] * * Apple IIc Plus Serial Port Modem Connector * Apple IIc Plus Serial Port Connectors ____ .-' `-. / 8 7 6 \ ( 5 4 3 ) \ 2 1 / `-.____.-' Pin Signal Description --- ------ ----------------------- 1 DTR1B Data Terminal Ready output DTR2B 2 DSR1B Data Set Ready input DSR2B 3 TD1B Transmit Data output TD2B 4 GND Power And Signal Common 5 RD1B Read Data input RD2B 6 GND Power And Signal Common 7 (Not Specified In IIc Tech Ref Manual 2nd Edition) 8 (Not Specified In IIc Tech Ref Manual 2nd Edition) A2Central describes the pinouts the same, but with pins 4, 6 and 8 as GND (Ground) and pin 7 not connected. * * Intrec "MultiSpeed Modem Cable" Mini DIN8 To DB25 * DIN8 DB25 [EIA RS-232-C Standard Connection Name] ---- ---- 1 5 [CTS = Clear To Send] 2 4 *and* 20 [RTS = Request To Send *and* DTR = Data Terminal Ready] 3 3 [RD = Receive Data] 4 7 [SG = Signal Ground] 5 2 [TD = Transmit Data] 6 7 [SG = Signal Ground] 7 8 [CD = Carrier Detect] 8 (No Connection) (END)