This repository contains the source code for the Dragon 64 versions of the Microsoft 16K BASIC Interpreter for the Motorola 6809 (aka BASIC-69 and Extended Color BASIC).

Software and modifications for Grant Searle's multicomp FPGA design, mostly focussed towards the 6809 variant: Forth (CamelForth), FLEX, CUBIX, NITROS9, FUZIX and the exec09 emulator.

A Tandy Color Computer 1, 2, and 3 assembler written in Python

Motorola 6809e 8-bit CPU emulator

A simple multitasking OS for the 6809

Various projects for the Tandy Color computer.

I'm programming the Vectrex to do a dinosaur game! This won the Hackathon.

6809 assembly language routine to find the length of a C-style string (with test suite in Disk Extended Color BASIC and 6809 assembly) (Version 1.8, released 1 June 2025)

Disassembly of 6809 based CMS 9609, 9619, 9639 and 9642 SBC Monitor ROMs

Adds language support in Atom for Motorola 6809/Hitachi 6309 assembly

The PC-09 will be a 6309 based microcomputer.

ASSIST09 - MC6809 Monitor, Copyright (C) Motorola, Inc., 1979, Appendix B of M6809PM/AD

vectrex game

A Motorola 6809 disassembler written in 6809 assembly.

Assembler and linker for the Motorola 6809 and Hitachi 6309 microprocessors

MC6809E simulator (and basic OS-9 I/O simulator) written in 80386 Assembly language (Borland TASM v1.01 and TLINK v2.00)

6809 assembler and emulator

Software and modifications for Grant Searle's multicomp FPGA design, mostly focussed towards the 6809 variant: Forth (CamelForth), FLEX, CUBIX, NITROS9, FUZIX and the exec09 emulator.

💾 Motorola 6809 8-bit microprocessor CPU Instruction

A Dragon 32 demo released at NOVA 2022