4 ms·

That's not a "DB"-19. The DB shell is much wider, sized to accommodate up to 25 pins. It's more likely a DA-19, or maybe a DE-19. Or, as the author specified

by gumby 2y ago

That's not a "DB"-19. The DB shell is much wider, sized to accommodate up to 25 pins. It's more likely a DA-19, or maybe a DE-19. Or, as the author specified their own dimensions, an unofficial variant. https://en.wikipedia.org/wiki/D-subminiature https://en.wikipedia.org/wiki/D-subminiature

throw0101d 2y ago
> That's not a "DB"-19. It is the colloquial term for the connector (regardless of what the 'official' name may be): > Several computers also used a non-standard 19-pin D-sub connector, sometimes called DB-19,[8] including Macintosh (external floppy drive), Atari ST (external hard drive), and NeXT (Megapixel Display monitor[9] and laser printer). * https://en.wikipedia.org/wiki/D-subminiature#Common_misnomers https://en.wikipedia.org/wiki/D-subminiature#Common_misnomer... * https://iec.net/what-is-a-db19-connector/ https://iec.net/what-is-a-db19-connector/ * https://www.ebay.com/sch/i.html?_nkw=db19+connector https://www.ebay.com/sch/i.html?_nkw=db19+connector > The early Macintosh and late Apple II computers used a non-standard 19-pin D-sub for connecting external floppy disk drives. * https://en.wikipedia.org/wiki/D-subminiature#Other https://en.wikipedia.org/wiki/D-subminiature#Other * https://en.wikipedia.org/wiki/File:Mac512k-rear_DB-19_Smartport_(cropped).jpg https://en.wikipedia.org/wiki/File:Mac512k-rear_DB-19_Smartp...
- raggles 2y ago
  It might be the colloquial term, but if you ask someone for a DB-15 connector then theres a good chance you'll get the wrong one. I regularly use both DE-15 and DA-15 in my line of work (among others), and any document that refers to a DB-xx for anything that isn't the DB shell size will be corrected.
  - deleted 2y ago
    [deleted]
gugagore 2y ago
So when people call the (smaller) PC serial port connector DB9, they're technically wrong? TIL
- ssl-3 2y ago
  For some versions of "technically," yes: A DB9 isn't really a thing. But ostensibly, everyone who needs to know will know what is meant when a person says "DB9," and thus it works fine. (Relatedly, the connector used for Ethernet is not an RJ45.)
  - javawizard 2y ago
    > (Relatedly, the connector used for Ethernet is not an RJ45.) Wait, what? I cannot find a single source on Google for this - they all say RJ45 is the correct term. If it's not an RJ45, what is it?
    - andrewshadura 2y ago
      8P8C
    - formerly_proven 2y ago
      Registered Jacks are always for phone stuff, the general-purpose name would be 8P8C.
    - atombender 2y ago
      Wikipedia has a good explanation: https://en.m.wikipedia.org/wiki/Modular_connector#8P8C https://en.m.wikipedia.org/wiki/Modular_connector#8P8C
    - colejohnson66 2y ago
      RJ45 is/was the pinout/wiring of an 8P8C[1] (eight pin/eight contact) connector designed for the telephone system.[0] The wiring specification of Ethernet is ANSI/TIA-568[2]. The only thing RJ45 has in common with Ethernet is that it used the same 8P8C-sized connector. But even then, RJ45 had a key notch on the side and Ethernet does not. [0]: https://en.wikipedia.org/wiki/Registered_jack#RJ45S https://en.wikipedia.org/wiki/Registered_jack#RJ45S [1]: https://en.wikipedia.org/wiki/Modular_connector#8P8C https://en.wikipedia.org/wiki/Modular_connector#8P8C [2]: https://en.wikipedia.org/wiki/ANSI/TIA-568 https://en.wikipedia.org/wiki/ANSI/TIA-568
buttocks 2y ago
Thankfully, the blog’s comments section was still open so that you could pollute it with your smug pedantry.
- gumby 2y ago
  It’s confusing. It’s a technical spec and the wrong use can be confusing, and can cause you to discover you have the wrong part at an inconvenient time. It’s a case where “size matters”. It used to be quite common to see a serial port wired in a B shell, sometimes with just three pins, making a DB-3. If you were making the point that I shouldn’t care if a bird were a raven or a crow in the background of a painting, sure, that would be pedantry (unless there were some important symbolism). But this is a simple case where a modicum of accuracy can make a big difference.
  - psim1 2y ago
    Apple themselves call the floppy connector a DB-19 (https://support.apple.com/en-me/112201 https://support.apple.com/en-me/112201). In this case, it would be better to use the "wrong" DB-19 term so that people seeking the referenced connector can find it.
- wannacboatmovie 2y ago
  It's not "smug pedantry", it's literally correct.
- eesmith 2y ago
  Already commented, on August 9th, 2016 at 7:23 am.
JeremyHerrman 2y ago
In the comments Steve addresses this: "The DB-19 isn’t really a B shell and probably shouldn’t be called “DB” anything if you’re being precise about naming. Apple called it DB-19 in their documentation, though, and the name stuck."

by gumby 2y ago

throw0101d 2y ago

> That's not a "DB"-19. It is the colloquial term for the connector (regardless of what the 'official' name may be): > Several computers also used a non-standard 19-pin D-sub connector, sometimes called DB-19,[8] including Macintosh (external floppy drive), Atari ST (external hard drive), and NeXT (Megapixel Display monitor[9] and laser printer). * https://en.wikipedia.org/wiki/D-subminiature#Common_misnomers https://en.wikipedia.org/wiki/D-subminiature#Common_misnomer... * https://iec.net/what-is-a-db19-connector/ https://iec.net/what-is-a-db19-connector/ * https://www.ebay.com/sch/i.html?_nkw=db19+connector https://www.ebay.com/sch/i.html?_nkw=db19+connector > The early Macintosh and late Apple II computers used a non-standard 19-pin D-sub for connecting external floppy disk drives. * https://en.wikipedia.org/wiki/D-subminiature#Other https://en.wikipedia.org/wiki/D-subminiature#Other * https://en.wikipedia.org/wiki/File:Mac512k-rear_DB-19_Smartport_(cropped).jpg https://en.wikipedia.org/wiki/File:Mac512k-rear_DB-19_Smartp...

raggles 2y ago
It might be the colloquial term, but if you ask someone for a DB-15 connector then theres a good chance you'll get the wrong one. I regularly use both DE-15 and DA-15 in my line of work (among others), and any document that refers to a DB-xx for anything that isn't the DB shell size will be corrected.
- deleted 2y ago
  [deleted]

gugagore 2y ago

So when people call the (smaller) PC serial port connector DB9, they're technically wrong? TIL

ssl-3 2y ago
For some versions of "technically," yes: A DB9 isn't really a thing. But ostensibly, everyone who needs to know will know what is meant when a person says "DB9," and thus it works fine. (Relatedly, the connector used for Ethernet is not an RJ45.)
- javawizard 2y ago
  > (Relatedly, the connector used for Ethernet is not an RJ45.) Wait, what? I cannot find a single source on Google for this - they all say RJ45 is the correct term. If it's not an RJ45, what is it?
  - andrewshadura 2y ago
    8P8C
  - formerly_proven 2y ago
    Registered Jacks are always for phone stuff, the general-purpose name would be 8P8C.
  - atombender 2y ago
    Wikipedia has a good explanation: https://en.m.wikipedia.org/wiki/Modular_connector#8P8C https://en.m.wikipedia.org/wiki/Modular_connector#8P8C
  - colejohnson66 2y ago
    RJ45 is/was the pinout/wiring of an 8P8C[1] (eight pin/eight contact) connector designed for the telephone system.[0] The wiring specification of Ethernet is ANSI/TIA-568[2]. The only thing RJ45 has in common with Ethernet is that it used the same 8P8C-sized connector. But even then, RJ45 had a key notch on the side and Ethernet does not. [0]: https://en.wikipedia.org/wiki/Registered_jack#RJ45S https://en.wikipedia.org/wiki/Registered_jack#RJ45S [1]: https://en.wikipedia.org/wiki/Modular_connector#8P8C https://en.wikipedia.org/wiki/Modular_connector#8P8C [2]: https://en.wikipedia.org/wiki/ANSI/TIA-568 https://en.wikipedia.org/wiki/ANSI/TIA-568

buttocks 2y ago

Thankfully, the blog’s comments section was still open so that you could pollute it with your smug pedantry.

gumby 2y ago
It’s confusing. It’s a technical spec and the wrong use can be confusing, and can cause you to discover you have the wrong part at an inconvenient time. It’s a case where “size matters”. It used to be quite common to see a serial port wired in a B shell, sometimes with just three pins, making a DB-3. If you were making the point that I shouldn’t care if a bird were a raven or a crow in the background of a painting, sure, that would be pedantry (unless there were some important symbolism). But this is a simple case where a modicum of accuracy can make a big difference.
- psim1 2y ago
  Apple themselves call the floppy connector a DB-19 (https://support.apple.com/en-me/112201 https://support.apple.com/en-me/112201). In this case, it would be better to use the "wrong" DB-19 term so that people seeking the referenced connector can find it.
wannacboatmovie 2y ago
It's not "smug pedantry", it's literally correct.
eesmith 2y ago
Already commented, on August 9th, 2016 at 7:23 am.

JeremyHerrman 2y ago

In the comments Steve addresses this: "The DB-19 isn’t really a B shell and probably shouldn’t be called “DB” anything if you’re being precise about naming. Apple called it DB-19 in their documentation, though, and the name stuck."