Discussion of large systems

and as for other sources, the position with the ICT/ICL 1900 seems to be that there is quite a bit about BUT it is not being made generally available because of copyright problems. Dave Holdsworth's work on saving George 3 (via software emulation of the executive interface) seems to be operational but hard to find. Easiest version to find was the one with the Algol68R compiler but Google currently doesn't seem to know where it is. Several other items did appear on http://www.fcs.eu.com/techlib/index.html but are now "Not available yet - please try again soon" (and I didn't manage to grab everything when they were up) - same applies to the manuals (but I got most of them). It is rumoured that a George 1/2 source tape exists - but that nobody has the right version of GIN5 to assemble it. (memories of the days when I kept a full source listing of G2 on my desk - complete with our local modifications). I have no idea whether any Operators Executive tapes exist - if they do I hope they are complete as distributed: bootable at start of tape followed by a complete source listing afterwards). I had a private project in mind to "build" a 1900 on an FPGA - but if no Exec remains that would be pointless. Andy