You are right. I am doing some retro stuff - 8085 based computer serial monitor.I didn't think that DB9 RS-232 interface is in vogue these days.
The last time I needed this information must have been 25 years ago.
Thanks. Also, I didn't know that used to be db25; did it used to be a parallel instead of a serial interface?DB9-RS232 is still in use widely in existing manufacturing operations that use CNC machines that go back to the 60's-70's-80's etc.
The method for upload/downloading programs is carried out this way for many decades.
The original DB connector was the DB25
Tthanks, I wasn't aware of this site.Hello,
You can find some info on DB9 and DB25 on the hardwarebook site:
http://www.hardwarebook.info/
Bertus
DB25 male and female connectors was the standard used to connect DTE (data terminal equipment) to DCE (data communication equipment aka modems) long before the IBM PC made its appearance.Thanks. Also, I didn't know that used to be db25; did it used to be a parallel instead of a serial interface?
No. Serial RS232.Thanks. Also, I didn't know that used to be db25; did it used to be a parallel instead of a serial interface?
Just three wires required with the H.S. jumpered out.Many devices did away with Hardware handshake and use XON XOFF software code instead.
Just three wires required with the H.S. jumpered out.
Yes, built from scratch.Do you still have your RS-232 Breakout Box?
I still have mine.
The lack of adequate understanding of how RS232 actually should be implemented, and all of the resulting problems, was a major push towards the development of USB, which "works" but has some nasty down sides.I bought my Breakout Box as a kit at the Dayton HamVention.
I never got around to assembling it into a box. So it is just a Breakout (BO and not a BOB) ?
Now that I have a 3D printer I suppose I can print a custom designed box. But what's the point now?
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