[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Problem with null modem for Apple IIc
"Rubywand" <rubywand@swbell.net> wrote in message
3FBFFDA9.BCF0F33F@swbell.net">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:
> >
> > ����ç??������� �����?�Ý?Ý?Ý?Ý?Ý?Ý?Ý?Ý?Ý?Ý?Ý?�
> > �Ý?Ý?Ý?Ý?Ý?Ý?Ý?Ý?Ý?Ý?Ý?�ì»?�������� �����?��ì»?�������� �����?��ì»?��
> > ������ �����?��ì»?�������� �����?��ì»?�������� �����?���ê??�
> > ������
�����?������������������������������������������������������������
> > ��������������������������������������ô??¿ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ �����?�Ý?Ý?Ý?�����ê??�
> > ������ �����?�����������������è??������
�����?���������������������������
> >
�����������������������������^�������������������������������������������
> > ������ê??������� �����?��
> >
> > 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