Follow the boards schematic from rc2014.co.uk. And build the CPU, ROM. RAM, SIO, CF Card board.
Follow the RC2014 Z80 building all to boards to run CP/M.
Build All the RC2014 Z80 Boards
68B50 ACIC with system clock and reset button
Z80 CPU Board
27C512 pageable ROM
62256 64K RAM
CF Card Interface.
// Your code here