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Null modem connection on 850 not working correctly

850 minicom bobterm null modem

6 replies to this topic

#1 jcrubin OFFLINE  

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Posted Sun May 17, 2015 8:44 PM

See the attached video, an attempt to connect to minicom on linux via null modem cable.  Don't know whats causing the issues

 

 

 

https://www.youtube....h?v=x4GndILJhdo



#2 jcrubin OFFLINE  

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Posted Sun May 17, 2015 8:48 PM

And this video with TCPSER

 

 

https://www.youtube....h?v=yYoH5Zt-lpY



#3 Justin Payne OFFLINE  

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Posted Sun May 17, 2015 9:07 PM

Do those terminals do VT-52 emulation? I looked at both of them and it wasn't very obvious that they did. I noticed one did VT-100 but that was it.



#4 David_P OFFLINE  

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Posted Sun May 17, 2015 9:28 PM

The 850 uses a non-standard pinout for its serial ports.  You have to either purchase or build a custom cable.  The FAQ details how to build one (http://www.faqs.org/...tari-8-bit/faq/ , section 6.1.)  I've cut and paste, but I think the format gods are against me.

 

PINOUTS
=======
850 Serial Port No. 1 (9-pin female connector):
1. Data Terminal Ready (DTR, Ready Out)
2. Carrier Detect (CRX, In)
5 1 3. Send Data (Out)
o o o o o 4. Receive Data (In)
o o o o 5. Signal Ground
9 6 6. Data Set Ready (DSR, Ready In)
7. Request to Send (RTS, Out)
8. Clear to Send (CTS, In)

Use a cable with the following connections to attach a standard RS-232 MODEM
to an Atari via the 850's Serial Port No. 1 (equivalent to the Atari CX87
Interface/Modem Cable):
DB25P (RS-232 MODEM) | DB9P (850 Interface)
20 1 - DTR
8 2 - CRX
2 3 - XMT
3 4 - RCV
7 5 - GND
6 6 - DSR
4 7 - RTS
5 8 - CTS
Frame - to the shield wire | No connection to shield



#5 jcrubin OFFLINE  

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Posted Sun May 17, 2015 9:45 PM

ahh david, that is most helpful, ill put something together and report back the results



#6 jcrubin OFFLINE  

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Posted Mon May 18, 2015 7:06 PM

New movie!!!
 

 

https://www.youtube....h?v=c-8ZM12mJlc



#7 jcrubin OFFLINE  

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Posted Mon May 18, 2015 7:19 PM

And a connection to YYZZ BBS

 

https://www.youtube....h?v=ezsenerDvyU







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