On Wed, 2011-05-11 at 19:46 -0300, Fernando Cassia wrote: > The Amiga and Apple computers were paramount. > > In fact, even the parallel port in the Amiga is non-standard, although > it is a DB25.
It'd been my observation that most parallel ports were very non-standard. There were different modes of operation, and many were only suitable for connecting a printer (they were an output, only). Though, the usual wiring to connect a printer to computer was usually the same on most computers. It were the extra pins that different. My Amiga had a really annoying aspect to its parallel port, one of the pins shared with the ring indicator signal from the serial port. > For Video, they used a 23-pin db25-like connector... so people > creating adapters at home had to use a DB25 female connector and saw > off two pins in one end... > The 23-pin connector is unusual, but not unobtainable. It was also used in other places, particularly with equipment with numerous multi-pin connectors (they'd use different pin numbers and genders, so that plugs could only be connected to the right sockets). Various home computers fail the general design credo of not putting voltages on exposed pins. Not that there's a dangerous voltage on them, but the pins are exposed to being easily short circuited, and the equipment often couldn't tolerate that. They're also easily physically damaged. Then there's the connectors that are wired up to highly static-sensitive electronics, without any precautions against it. And circuitry that doesn't survive hot-plugging. Or circular connectors with weak pins that get bent off by people rotating the plug around until it fits... -- [tim@localhost ~]$ uname -r 2.6.27.25-78.2.56.fc9.i686 Don't send private replies to my address, the mailbox is ignored. I read messages from the public lists. -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
