cavaliercoder / go-m68k

A Motorola 68000 Emulator written in Go

go-m68k

This project contains a number of tools and libraries for emulating the Motorola 68000 chipset; used in devices like the Apple Macintosh, Sega Megadrive and Commodore Amiga.

WARNING This project is an incomplete work in progress.

The goal of this project is less about performance or competing with existing emulators. It's more about enabling a better development and learning experience for novices like me.

Installation

$ go get github.com/cavaliercoder/go-m68k/...

Example

Compile the following Motorola 68000 assembly using a supported compiler:

* Test 68000 simulator program

WRCHAR  EQU     6                       Trap # for write D1.B char to screen

        ORG $1000

        LEA      MESSAGE(PC),A0         Point A0 to start of message
NEXT    MOVE.B  (A0)+,D1                Get character, increment pointer
        BEQ.S   FINISH                  Exit if end
        MOVE.B  #WRCHAR,D0              Set up trap to write to screen
        TRAP    #15                     Write char. to screen
        BRA.S   NEXT                    ..and loop back
FINISH  STOP    #$2700                  Halt
MESSAGE DC.B    'Hello world!',$0D,$0A,0

        END     $1000

Run the program:

$ m68k hello-world.h68
Hello world!