Thanks to TAKEDA, toshiya's Home Page, there is a real working Epson PX-8 emulator.
If you are looking for the original program, please visit
http://homepage3.nifty.com/takeda-toshiya/
or in detail
http://homepage3.nifty.com/takeda-toshiya/hc80/index.html

If you want to download the whole package of all his emulator, try these links:
http://homepage3.nifty.com/takeda-toshiya/common/source.zip
http://homepage3.nifty.com/takeda-toshiya/common/binary.zip

I added 4 original ROM files and one self created one:
FONT.ROM
SYS.ROM
UTIL.ROM
BASIC.ROM
and
TPASCAL.ROM

If you start PX8.EXE (renamed, original name was HC80.EXE), default for drive B:
is BASIC.
To test the Turbo PASCAL 3.0 ROM:
Rename BASIC.ROM to BASIC.ORG and TPASCAL.ROM to BASIC.ROM.
This is necessary because the filenames are fixed in the binary.

Peter Dassow in February 2010
