On Thu, Apr 16, 2020 at 11:46 AM RETRO Innovations <go4re...@go4retro.com> wrote:
> On 4/16/2020 11:17 AM, Tom Wilson wrote: > > Does the kit just not have a serial connector, or is it a DB-25? > > > > (fun trivia fact... there is no DB-9. The “B” refers to the size of > > the shell, and the 9 pin D-Sun is axtually an E size. So a 9 pin port > > is DE-9. But since so many people say it wrong, manufactures just > > incorrectly call then DB-9.) > > Which makes it a redundant statement, right: DE-9 = D(9)-9 :-) > > Jim > > Not really. DE doesn't mean "9 pin." DE is the physical size of the shell. 9 is the number of pins. Both parts of the name are required to correctly specify the connector. A VGA port is the same size as a 9-pin serial port, but it has 15 pins on three rows. So it's a DE-15HD. (As you'd expect, HD means "High Desnsity".) A game port (the old school 15-pin one) is actually a DA shell, so it's DA-15. So this can cause confusion if you tell someone you need a "DB-15" connector, since there are two D-Sub connectors that commonly use 15 pins - the DE-15HD VGA connector and the DA-15 [image: image.png] Here's the size chart from Wikipedia <https://en.wikipedia.org/wiki/D-subminiature>.
