lo

lea    (MarkeyJester’s).l,a0

       lea    (Motorola).l,a1

       move.l #$00068000,d0

add.l  #Beginner’s,d0

move.l #Tutorial,d1

       move.l d0,(a0)+

       move.l d1,(a1)+

(MarkeyJester’s Motorola 68000 Beginner’s Tutorial)

This tutorial is in the process of being written and in the middle of clean up, please take notice that there may be errors or incorrect sections currently that have yet to be fixed, so hang around, grab a biscuit and a lovely cup of tea, and all will be fine in the mean time =)

~MarkeyJester

Introduction

Hello reader!  I go by the name of MarkeyJester, I’m a “Pro User” at sonicresearch.org and a “Tech Member” at sonicretro.org, and I know quite a few programming languages, however, I specialise mainly in an assembly language for the 68k (Motorola 68000 series), I specialise in this language because I’m in the process of programming a full platform game for the SEGA Mega Drive, and it’s main processor just so happens to be the Motorola 68000.

I was inspired by “redhotsonic’s” (a “Pro User” at sonicresearch.org and a “Scener” at sonicretro.org) beginner’s tutorial for 68k assembly, and decided to make one myself as his one was incorrect in many areas, but its format was very well set out, so you may find this tutorial to be similar in several aspects.

Contents

Section 01 - Getting Started:

• Part 00 – Getting Started

• Part 01 - Computer Memory
• Part 02 - Instructions
• Part 03 – The MOVE Instruction
• Part 04 – Program Flow
• Part 05 – The ADD Instruction
• Part 06 – The SUB Instruction
• Part 07 – The SWAP Instruction
• Part 08 – The EXG Instruction
• Part 09 – The CLR Instruction

Section 02 – Addressing and Binary Manipulation:

• Part 10 – 68k Memory
• Part 11 – More About Memory Addressing
• Part 12 – Homework 03
• Part 13 – Results 03
• Part 14 – The NOT Instruction
• Part 15 – The AND Instruction
• Part 16 – The OR Instruction
• Part 17 – The EOR Instruction
• Part 18 – The BSET, BCLR and BCHG Instructions
• Part 19 – Positive, Negative, Signed and Unsigned

Section 03 – Unsigned, Signed and more Binary Manipulation:

• Part 20 – The NEG Instruction
• Part 21 – The LSL, LSR, ASL, ASR, ROL and ROR Instructions
• Part 22 – The SF and ST Instructions
• Part 23 – The EXT Instruction
• Part 24 – Word Signed Extension on Memory Addresses
• Part 25 – Homework 04
• Part 26 – Results 04
• Part 27 – The NOP Instruction
• Part 28 – The MULU and MULS Instructions
• Part 29 – The DIVU and DIVS Instructions

Contact

If you wish to contact me about improvements for the guide, you can email me at markey the jester at hotmail dot co dot uk, if it’s nothing to do with this guide, I will dismiss any messages from you period.

Special thanks to http://www.quotegarden.com/ and http://www.brainyquote.com/ for the quotes used in this tutorial, to redhotsonic for inspiration and ideas drawn from his guide, and to Jorge, andlabs and FraGag, for their help, opinions, overviews and corrections.