As part of getting my 8K BASIC running I've had to make a simple modification to my Version 1 Z-80 CPU card.
This modification allows the board to address the full 8K EPROM.
The details are in the file area under 'Builders Journals' - 'Neil B'.
http://n8vem-sbc.pbworks.com/w/browse/#view=ViewFolder¶m=Z-80%20CPU%20V1%208K%20EPROM%20Mod