emuz80

The computer with only Z80 and PIC18F47Q43

The required clock frequency for the Z80 is as follows
emuz80_pic.hex 2.5MHz
emuz80_pic_kuma.hex 2.5MHz
emuz80_pic_hlide.hex 4.6MHz
emuz80_pic_yyhayami.hex 4.3MHz
emuz80_pic_gazelle.hex 6MHz PIC must be replaced with PIC18F47Q84

Hardware information can be found here. It is written in Japanese.
https://vintagechips.wordpress.com/2022/03/05/emuz80_reference/