does anyone have good resources on the inner workings of the zilog z80? i'm going to attempt to make a zx spectrum emulator
Found this after a little searching: https://baltazarstudios.com/z80-ground/
Zilog Z80 FPGA

A-Z80 is a conceptual implementation of the venerable Zilog Z80 processor targeted to synthesize and run on a modern FPGA device.

Baltazar Studios