Designed and sold by Wichit Sirichote. Full text and files at his website here. The kit is available for sale, kit or assembled!
Wichit picked the Z80 CPU and designed the microcomputer kit with HEX keys and 7-segment LED displays, and wrote the monitor program.

The version I have is an older (slower) version with a monitor (source in User manual) close to the the Microprofessor 1b. The current one has a SDCC compiler generated monitor program.

	Z80 Microprocessor Kit
	Circuit diagram
	Z80 kit User Manual
	Z80 kit Construction
	Z80 lab book
	Lab book Assembler routines
	Show Memory on LED displays
	AN001 Using SDCC with the Z80 kit
	AN002 Using PLD as a decoder logic for Z80 Kit
	AN004 Z80 kit as calculator
	PLD files
	PLD sources
	SDCC version 20215
	SDCC sources for z80 kit
	Listing of the old Z80 kit monitor