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# Defining a Custom cc65 Target

## Bruce Reidenbach

2010-02-22

This section provides step-by-step instructions on how to use the cc65 toolset for a custom hardware platform (a target system not currently supported by the cc65 library set).

## 1. Overview

## 2. System Memory Map Definition

## 3. Startup Code Definition

## 4. Custom Run-Time Library Creation

## 5. Interrupt Service Routine Definition

## 6. Adding Custom Instructions

## 7. Hardware Drivers

## 8. Hello World! Example

## 9. Putting It All Together

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