"Rubywand" wrote in message news:3FBFFDA9.BCF0F33F@swbell.net... > Your name writes ... > > > > Hi, > > > > I am having a problem getting a null modem to work between my Apple IIc > > and my laptop PC. I hope someone can help me solve this problem. > > > > I want to use the null modem to run ADT, but I keep getting I/O errors in > > ADT. I created my null modem cable according to the following pinout: > > > > DIN-5, male DB9, female > > (Apple) > > > > 4 (2) TXD --> 2 RXD > > 5 (4) RXD <-- 3 TXD > > 2 (3) GND --- 5 GND > > 1 (1) DTR --> 6 DSR --, pins 6 and 1 connected by jumper > > 1 DCD --' > > 3 (5) DSR/DCD <-- 4 DTR > > > > The pin numbering that I used for the DIN-5 connector, as viewed by > > looking at the pins on the front, are: > > > > Apple numbering Standard numbering > > > > 1 5 1 3 > > 2 4 4 5 > > 3 2 > > > > The pin numbering that I used for the DB9 end of the null modem cable, as > > viewed by looking at the front of the female connector, are: > > > > -------------- > > \ 5 4 3 2 1 / > > \ 9 8 7 6 / > > ------- > > > > This is what happens when I install the null modem cable, and I boot up > > Windows 3.11 (on the PC) and ProDOS (on the Apple IIc). > > > > If I type IN#2 on the apple, I can enter text in a terminal emulator and > > the text will display perfectly on the Apple IIc monitor. > > > > However, if I type PR#2 (print to the serial port) when I type something > > on the Apple, I get gibberish on the teminal emulator (ion the PC sode). > > The gibberish looks like this: > > > > 鉗鉗迯坐ﾓﾙﾎﾔﾁﾘ ﾅﾒﾒﾏﾒ?在在在在在在在在在在在在 > > 在在在在在在在在在在在在ｻ麹ｿﾓﾙﾎﾔﾁﾘ ﾅﾒﾒﾏﾒ?在ｻ麹ｿﾓﾙﾎﾔﾁﾘ ﾅﾒﾒﾏﾒ?在ｻ麹ｿ > > ﾓﾙﾎﾔﾁﾘ ﾅﾒﾒﾏﾒ?在ｻ麹ｿﾓﾙﾎﾔﾁﾘ ﾅﾒﾒﾏﾒ?在ｻ麹ｿﾓﾙﾎﾔﾁﾘ ﾅﾒﾒﾏﾒ?在韭麹ｿ > > ﾓﾙﾎﾔﾁﾘ ﾅﾒﾒﾏﾒ?在韋韋韋韋韋韋韋襌褪襁襁襌褪 > > 褪麹ｿﾓﾙﾎﾔﾁﾘ ﾅﾒﾒﾏﾒ?在在在在韭麹ｿ > > ﾓﾙﾎﾔﾁﾘ ﾅﾒﾒﾏﾒ?在鉅鉅鉅跖跖麹ﾓﾙﾎﾔﾁﾘ ﾅﾒﾒﾏﾒ?在韆鉅跚韆鉅蓙韆鉅蓙銛蓙鈕 > > 銛蓙鉗蓙鈕跚蓙趁蓙蓙碯趾碯蓙^在跚跖鉅跚韭鉅跚韭韭跚韭鉞韭 > > 跖跚韭麹ｿﾓﾙﾎﾔﾁﾘ ﾅﾒﾒﾏﾒ?在 > > > > The serial port settings on both sides are the same, and I'm running at > > 300 baud. > > > > Does anybody know what I am doing wrong, ar have a suggestion that will > > help me. It appears that I can send text from the PC to the Apple IIc, > > but CANNOT send text from the Apple IIc to the PC. > > > .... > > It looks like your cable is wired correctly and your setup is working the > way it should. > > You can get rid of the high bit and get the right characters on the PC > side by telling your PC terminal program to force 7-bit ASCII on received data. > In Hyperterm, you go to Properties, click on Settings, and click on ASCII > Setup, to get to the setting. (Which is fine for Text. Don't think you'd want > that setting for transferring files, though.) > > Instead of doing a PR#2, you can get into a dumb terminal mode by doing > ... > > IN#2 > CTRL-A T (Control-A --- you see a ?-- followed by pressing T) for Term mode > CTRL-A I to echo characters you type on the IIc > CRTL-A R to reset port and exit serial Port 2 firmware > > > I don't know why ADT should not be working. Have you tried a higher baud > rate, like 2400? > > You could check the ADT you transferred to your Apple IIc using a short > program which does a checksum test. You can find a listing in the file > ADTcheckJUL2000.txt at http://apple2.org.za/gswv/a2zine/Utils/ . I have recently made 2 cables that both work with the IIc. Here is my cable. Looking into the back of the 5 pin Din male connector. 5 1 4 2 3 Looking at the back of the 9-pin female connector. 1 2 3 4 5 6 7 8 9 5 pin Din 9 pin 1 6 2 2 3 5 4 3 5 4 This will work, just be sure nothing is grounded to the cable shield. Bill @ GarberStreet Enterprizez };-) Web Site - http://garberstreet.netfirms.com Email - willy4SPAM6pa@comXcast.net Remove - SPAM and X to contact me --- This email ain't infected, dude! Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.537 / Virus Database: 332 - Release Date: 11/7/03