This update to NCIOSPEC.TXT covers the differences between the NC100 hardware
(documented in the original NCIOSPEC.TXT below) and the NC150/NC200 hardware.
This information was discovered mainly by Russell Marks during development of his
E1 = data
[[http://groups.google.com/group/comp.sys.amstrad.8bit/browse_thread/thread/ce201414eff39a29/19cb6f7056d49480?lnk=gst&q=nc100+sound#19cb6f7056d49480|Russell Marks's notes about sound generation on NC100]]
[[NC100 IO Specification]]