OS's with loadable filesystem support 2399
slightly related post on issues of disk use in os-360
File path formats. 2400
Charles Shannon Hendrix RISC OS didn't have file extensions. As Peter said, it used an internal number to represent the file...
however, one of the other things that i did to cp67 was add tty-ascii support. i thot i could do some really fancy stuff with 2702 terminal controller ... dynamic terminal and line speed recognition. I was able to do the dynamic terminal stuff with 2702 (being able to dynamically rebuttign line-scanner to different ports) ... but the 2702 wasn't capable of handling dynamic line speed ... line speed oscillator was hardwired to each port.
this spawned a university project to build our own controller ... reverse engineering the 360 channel interface and building a controller channel board that went into an interdata-3 programmed to emulate a mainframe controller (AND do dynamic line speed operation).
somewhere there is a article supposedly blaiming four of us at the university for spawning the mainframe plug compatible controller business
and supposedly the plug compatible controller business was the big driving factor behind FS (which was a really large project but was canceled before ever being announced)
and I've frequently commented that the origins of 801-risc was attempting to do nearly the exact opposite of the horribly complex FS effort
a few years ago I ran into somebody who said that he had made a really good living selling perkin-elmer machines into fed. gov. accounts in the early 80s, (where they attached to mainframes) ... and after some discussion, he commented that channel attack board looked like it hadn't been redesigned since the original one that we built in the 60s (aka ... perkin-elmer had bought interdata and was selling the boxes under their logo).