Perhaps the different extension is merely trying to assert that the file does (or does not) have extended address records to support 32-bit memory spaces.
Read-Only
Author R. Ford
Posted 16-Jan-2006 13:48
Toolset C166
RE: Need H86 File Format Info
R. Ford
To answer my own question: You can obtain your own copy of Intel Hex specification at: ftp://download.intel.com/support/processors/i960/devtools/intelhex.pdf