IZ does a fairly good job of translating assembly language source programs
written in Intel 8080 or TDL 8080 mnemonics into equivalent programs written
in Zilog Z80 mnemonics.  It even translates the macros in Z80.LIB into single
Z80 instructions.

Version 4.4 is a significant upgrade.  Several changes have been implemented
as a consequence of translating just one file!  For full details see iz44.txt
in the archive but here is a brief summary taken from iz.c:

   .	Handle "PUSH A" instruction as if it were "PUSH PSW".
   .	Skip '$' symbols in numbers and identifiers.
   .	Avoid splitting lines after a label with no colon.
   .	Fix bug in string handling.
   .	Ensure that the label on an EQU pseudo-op does not have a colon.
   .	Ensure that the label on a storage allocator (e.g. defb, defw)
	does have a colon.
   .	Pander to M80's idiosyncracy with respect to INCLUDE and MACLIB
	directives.
   .	Deal with parenthesised expressions in Intel arguments.
   .	Handle orphaned labels without a trailing colon.
