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 6809 microprocessor kit is a member of the microprocessor kit family (I have also the 6502 and Z80 kit), and share a common design as far as keyboard and LED display and 32K RAM concern, in a format comparable with the Microprofessor 1b.
This kit has hardware serial (68B50) UART at 19200 baud, a big step up from the software serial bitbanged slow 2400 baud in the other kits.

	6809 Microprocessor Kit 2017
	6809 kit User Manual
	Monitor source
	Programming book
	Programming book V2 2020
	Quickstart
	Schematocs 6809 kit
	PLD for 6809 kit
	10 ms tick circuit
	6809 CC compiler/assembler
	V3 PLD and ROM
	6809 tools (compiler assembler)
	6809 monitor V2
	New monitor V1
	New monitor
	Monitor V3