classic operating systems

What do you mean by "available"? Freely distributable? Hmm, some of the FigForths fall in this category (if you want to call them OS's), and OS/8 is there too. Easily acquired? There are several disassemblies of CP/M-80 and Apple DOS 3.3 floating around in various places, but these aren't the "official" sources - they're a disassembly. The PL/M sources to CP/M-80 are also available, though I've never quite figured out how to go from the PL/M to the executables. You can get the source if you hand over enough $? Sure, lots of minicomputer OS's fall in this category. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927