The old system we are talking about here was Ericsson JZA 715, mostly written in Pascal with some parts in PDP-11 assembly, running under RSX-11M. Melbourne was the first site in the Southern Hemisphere for Ericsson's JZA series train control software, going live in 1982. JZA 715 first went live in Oslo in 1979. Earlier iterations of Ericsson's JZA software (JZA 410) went live in Stockholm in 1971 and Copenhagen in 1972.
Almost 20 years ago I worked for a company that was bidding on replacing the CRTs that had been rendering platform train information, which was spat out as a stream from said PDP11. I even went to Flinders St and got to see it.
It was everything you imagine a 70s era data stream to look like. 1200bps, weird control sequences, etc., etc. And no-one could really tell us much about it, but there was some poorly photocopied incomplete documentation.
Apparently, this is no longer the case, and the old emulated PDP-11 system was replaced with a new system in 2014–2016: https://news.ycombinator.com/item?id=29157259
The old system we are talking about here was Ericsson JZA 715, mostly written in Pascal with some parts in PDP-11 assembly, running under RSX-11M. Melbourne was the first site in the Southern Hemisphere for Ericsson's JZA series train control software, going live in 1982. JZA 715 first went live in Oslo in 1979. Earlier iterations of Ericsson's JZA software (JZA 410) went live in Stockholm in 1971 and Copenhagen in 1972.
The toot itself is from 2021, and links to a 2012 PDF* from the "ASPECT 2012 Conference (UK)", specifically
[*] Due to the website's interface, navigating directly to https://webinfo.uk/webdocssl/irse-kbase/ref-viewer.aspx?refn... seems to serve a web page that requires clicking through to request the PDF.Almost 20 years ago I worked for a company that was bidding on replacing the CRTs that had been rendering platform train information, which was spat out as a stream from said PDP11. I even went to Flinders St and got to see it.
It was everything you imagine a 70s era data stream to look like. 1200bps, weird control sequences, etc., etc. And no-one could really tell us much about it, but there was some poorly photocopied incomplete documentation.