User:Doruletz72/ONBA

Onboard Assembler

Onboard Assembler (OnbA), a part of the Onboard Suite available under GPL license at SourceForge.net, is a free software package providing application development "onboard" of Palm/Garnet OS devices. Additionally this package contains a free editor, SrcEdit; and a free C compiler, Onboard C. Unfortunately OnbA is poorly documented, so I hope this book will help to correct that, and assist anyone intent on building applications in 68k assembly language on Palm OS devices.
I understand the knowledge is free concept, but in this book, regarding which knowledge is really free, we will follow the Wikibooks policy; so any information subject to copyright or other proprietary rights will be presented only in short form.
The entire book is a compilation of Palm OS specifications, Motorola 68k assembly language and Onboard Assembler how to's. Most of the examples are built as a comparison between C standard code and 68k assembly code.

Table of Contents

• Overview of the Palm 68k Embedded Devices

Palm OS memory. Palm OS files. PRC executable files. Running an application. The registers. Address modes. Instructions set.

• Assembly Language Elements

Variables. Arrays. Structures. Operators. Statements. Conditionals. Loops. Procedures

• Onboard Assembler Specifications

Starting. First program. Skeleton with no forms. Adding forms. Multi-segment applications. Directives. Known bugs. Redundant code. Systraps.inc

• Address Modes

Direct. Indirect. Absolute. Immediate. Implied.

• Instructions Set

Format. Codification. Data Movement. Logical. Integer Arithmetic. Bit Manipulation. Shift and Rotation. BCD. Program. System. CCR and SR.