You'll be glad to know IBM is not infallible - they missed one. The URL http://www.snipix.freeserve.co.uk/hercinst.html survives near the top of page 509.
The URL is dead. Nothing sinister, though - as I surmised, the owners have simply dumped Freeserve (very sensible of them) and gone to http://liberti.dhs.org/public/computing/linux/emulators/hercules/hercinst.htm -- Phil Payne http://www.isham-research.com +44 7785 302 803 +49 173 6242039
