3 ms·
Weren’t all DECwriters, and just about any terminal from the 1970’s on, pretty much exclusively RS-232?
by drfuchs 7y ago
Weren’t all DECwriters, and just about any terminal from the 1970’s on, pretty much exclusively RS-232?
- ChicagoDave 7y agoYes. Nearly every peripheral worked through serial ports.
- Lowkeyloki 7y agoYou might say that the Serial Bus was nearly Universal.
- BuildTheRobots 7y agoSerial was ubiquitus but hardly universal. Loosing hours to the "change the baud, bits, reboot it" dance whilst bit-banging cts by shorting things with resistors, all just trying to get a terminal. Mating wildly different number of pins, pinouts and connector shapes whilst being mindful that some devices want -48v and others between 3 and 5, it was a frikkin' mess. Lots of problems; big mess. So they unified things to a universal standard, whilst still keeping the spirit of serial alive. And by that, I mean wildly different plugs, different numbs of pins, incompatable pinouts, crazy voltages, drive issues and more. Truly the interoperable future is here. (what? no, pass me _the_ usb cable. Idiot; it's the one that looks like the inside out apple cable. But not _that_ inside out apple cable, because although they're identical on the outside and will plug together....)
- cbm-vic-20 7y agoA lot of serial equipment back then still had 20mA current loop. For example, the ASR 33 Teletype[1], which was often connected to PDPs of its era did not have RS-232. [1] https://en.wikipedia.org/wiki/Teletype_Model_33#Communications_Interface https://en.wikipedia.org/wiki/Teletype_Model_33#Communicatio...
- jascii 7y agoEasily fixed with an opto-coupler, a transistor, and a hand full of resistors..