This is bare PCB for TL866 EPROM adapter
Supported EPROM parts are 27C322, 27C160, 27C800 and 27C400.
For complete assembly you will need:
5pcs ... 10k resistor
1pcs ... BC327 transitor (or compatible type)
2pcs ... 20pin 2.54mm pinheader
1pc ... 48pin ZIF socket
1pc ... 3pin DIP switch
1pc ... DPDT mini switch