Grant Searle helped me a lot in the early days of this project with some critical MK14 related information. His website contains a scan of the SC/MP datasheet and full instructions to build your own Jupiter Ace - http://home.micros.users.btopenworld.com/
Retro-computing is alive and well in Europe too. Bruno Vivien recounts his tale of bringing his early 1980s DAI system back to life. His site contains a copy of the INS8154 datasheet. His assistance was invaluable in getting the MK14 reproduction ready to go for PCB layout - http://perso.wanadoo.fr/bruno.vivien/DAI/index.htm
Paul Robson's definitive website on the MK14 - history, listings, cross-assembler and emulator - http://members.aol.com/mk14emu/.
Local copy here, since it looks like AOL pulled the hosting on the above link.
Tasm is a flexible assembler that with Paul Robson's SC/MP data file can be used to cross-assemble SC/MP code on a PC. The latest version (3.2) fixes some important bugs in the earlier version that can be found on Paul's website. http://home.comcast.net/~tasm/
You can find a copy of the revised MK14 User Manual plus some great details about a MK14 put to good use at the heart of a homebrew synthesiser on the Pink Mouse Productions website.http://pink-mouse-productions.com/mk14/index.htm
Ronald Dekker in the Netherlands shares my retro-enthusiasm for SC/MP and NIBL in building a working BASIC system. A very useful resource site for NIBL.http://www.dos4ever.com/SCMP/SCMP.html
Jim Austin has a remarkable collection of all kinds of machines - take an inspiring look at how things used to be in the computing world.http://www.computermuseum.org.uk/
The Gallery of Old Iron has some excellent information (and many wonderful pictures) on IBM mainframes from the 1950s and 1960s, including a small section on SLT/SLD/MST.http://www.thegalleryofoldiron.com