Difference between revisions of "Motorola 68000"

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(Registers)
(Registers)
Line 11: Line 11:
 
==== Registers ====
 
==== Registers ====
  
D0..D7 - 8 x 32 bit General Purpose Registers
+
* D0..D7 - 8 x 32 bit General Purpose Registers
  
A0..A6 - 7 x 32 bit Address Registers
+
* A0..A6 - 7 x 32 bit Address Registers
  
A7 - 32-bit Stack-Address Register
+
* A7 - 32-bit Stack-Address Register
  
 
==== Instructions timing ====
 
==== Instructions timing ====

Revision as of 04:33, 20 June 2022

Introduction

Wanting to start sizecoding on a Motorola 68k platform in this day and age can be tough.

So here is a bit of help to get you started:

The Motorola 68k processor

The Motorola 68k processor...

Note: Assigment direction is source,dest instead of dest,source !!!

Registers

  • D0..D7 - 8 x 32 bit General Purpose Registers
  • A0..A6 - 7 x 32 bit Address Registers
  • A7 - 32-bit Stack-Address Register

Instructions timing

The number of cycles for each instruction is different depending of processor model in M68K family.

http://oldwww.nvg.ntnu.no/amiga/MC680x0_Sections/mc68000timing.HTML

Motorola M68K Platforms