Uploaded to ftp://ftp.devoresoftware.com/downloads/emm386 are the
files emmx203.zip, EMM386/HIMEM mostly executable package, and
emms203.zip, EMM386/HIMEM mostly source package.

EMM386 Version 2.03 is a minor update, recommended for those using
programs which are bound to the WDOSX DOS extender.  It fixes an error
which could cause those programs to crash or fail at startup.  If you
do not ever use the WDOSX extender, 2.03 should operate no differently
than 2.02.

Specifically, 2.03 saves the high word of the EAX register when
servicing VCPI function DE04h, allocation 4K page.  WDOSX apparently
uses the high word of the EAX register across the DE04h call, and
certain values can make it fail.

This version of EMM386 also adds an IRETD after the HLT emulation
instruction in the monitor code, as a safety net should the CPU
continue after the HLT instruction.  This may help developers with
QEMU debugging.