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HowTo: Internet via Null Modem Cable

Some_Person

Active member
This will tell you how to let your classic Mac access the Internet via a null modem cable. You need a Mac with Mac OS 9. I've read that Mac OS 8.5-8.6 should work too, but I have not tried it. It will also work using a PPC emulator, such as Sheepshaver. This guide assumes that the Internet is already working on your Mac OS 9 system.

First configure Mac OS 9:

1. Open the Remote Access control panel.

2. Select "Modem" from the Remote Access menu.

3. Select "Null Modem (57600)" as your modem.

4. Close the Modem control panel.

5. Choose Users and Groups from the Remote Access menu.

6. Select your username (or guest if you don't use user accounts), and set it to allow dialing in to the computer.

7. Close the Users and Groups control panel.

8. Choose "Answering" from the Remote Access menu.

9. Enable "Answer Calls".

10. Check the box allowing access to the entire network.

11. Check the box allowing clients to specify their own IP address (for some reason DHCP doesn't work).

12. Put in an unused local IP in the box. This IP will be used by your Classic Mac.

13. Close the Answering window. You may close the Remote Access window if you want to.

Now set up the Classic Mac:

1. Install MacTCP and MacPPP.

2. Open the MacTCP control panel.

3. Select the PPP icon.

4. Click "More".

5. Under "Obtain Address", select "Manually".

6. Input an unused local IP address that will be used by the Classic Mac.

7. Under "Gateway Address", input the IP address of your router.

8. Under "Domain Name Server Information", input the IP address of your ISP's DNS server.

9. Click OK, then close the MacTCP window.

10. Open the Config PPP control panel.

11. Click on the Config button.

12. Set the Port Speed to 57600.

13. Set the Flow Control to None.

14. Make sure the Phone Number and Modem Init fields are blank.

15. Click Done.

16. Set the correct port (Modem or Printer).

17. Make sure Terminal Window and Hangup on Close are not checked.

18. Click Open. After connecting, you may close the Config PPP window if you want to.

Congratulations! Your Classic Mac is now connected to the Internet!

 

Dog Cow

Well-known member
Most people just throw out the term "null modem" cable without saying what else functions as one.

Here's an extremely valuable tip which I wish I had read earlier: a lot of printer cables are wired as a null modem cable. In fact, I have had no problems at all with the Apple StyleWriter cable.

 
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