DavidMil Posted August 14, 2019 Share Posted August 14, 2019 I promised someone a while back that I would post the pinouts for the CX88 Terminal Cable, so here they are. Both ends of this cable have male connectors and only seven of the pins on each end are used. They are: On the DB9 end pins 1,2,3,4,5,6,7,8 On the DB25 end pins 2,3,4,6,7,8,20 The actual wires connect as follows: DB9 to DB25 1 6 2 4 3 3 4 2 5 7 6 20 7 8 Even though there are more pins on the DB25 end, none of them are used. And under no circumstances should you every try to plug any type of serial cable to port 4 on the 850 and your modem! David Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted August 14, 2019 Share Posted August 14, 2019 what happens if you do that? Quote Link to comment Share on other sites More sharing options...
DavidMil Posted August 14, 2019 Author Share Posted August 14, 2019 8 minutes ago, _The Doctor__ said: what happens if you do that? On the CX88 cable, nothing. But any industry standard cable attached to pin 9 on port 4 of the 850 will dump -8 volts into your modem. I blew my Hayes 300 baud Smartmodem that way before I learned that you shouldn't use any cable but an Atari cable with the 850. David 2 Quote Link to comment Share on other sites More sharing options...
Mclaneinc Posted August 14, 2019 Share Posted August 14, 2019 Ouch...Not a good way to learn.... Quote Link to comment Share on other sites More sharing options...
DavidMil Posted August 14, 2019 Author Share Posted August 14, 2019 16 hours ago, DavidMil said: I promised someone a while back that I would post the pinouts for the CX88 Terminal Cable, so here they are. Both ends of this cable have male connectors and only seven of the pins on each end are used. They are: On the DB9 end pins 1,2,3,4,5,6,7,8 On the DB25 end pins 2,3,4,6,7,8,20 The actual wires connect as follows: DB9 to DB25 1 6 2 4 3 3 4 2 5 7 6 20 7 8 Even though there are more pins on the DB25 end, none of them are used. And under no circumstances should you every try to plug any type of serial cable to port 4 on the 850 and your modem! David Sorry, seems like I've got happy fingers that like to keep typing. On the DB9 connector on pins 1 through 7 are used Not 8. David Quote Link to comment Share on other sites More sharing options...
BillC Posted September 9, 2019 Share Posted September 9, 2019 On 8/13/2019 at 11:45 PM, DavidMil said: On the CX88 cable, nothing. But any industry standard cable attached to pin 9 on port 4 of the 850 will dump -8 volts into your modem. I blew my Hayes 300 baud Smartmodem that way before I learned that you shouldn't use any cable but an Atari cable with the 850. David Since the 850 serial ports are a different gender than the industry standard(850-DE9F vs. PC-DE9M) it would be difficult to use any cable but one made specifically for the 850(or the ICD MIO/PRC). Quote Link to comment Share on other sites More sharing options...
Urchlay Posted September 9, 2019 Share Posted September 9, 2019 DB-9 gender changers can be had for next to nothing, if someone's really determined to use the wrong cable... 3 Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted September 9, 2019 Share Posted September 9, 2019 oh and they certainly show determination don't they! 1 Quote Link to comment Share on other sites More sharing options...
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