Everything HP200LX: Knowledge, Products, Service

9 years, 100's of pages of HP Palmtop Paper, jammed with tips, reviews and how-to's

Most useful, up-to-date Web sites devoted to the HP 200LX

Direct link into 1000's of pieces of Palmtop software

Tips from Our Techs

2008 Catalog
(PDF, 2.6 MB)

Contact Us/About Us

Weekly Palmtop Paper Newsletter
(Palmtop tips, latest happenings, and HP Palmtop Paper Store information)



Privacy Policy

What's in the Revised HP Palmtop Developer's Guide

What's in the Revised HP Palmtop Developer's Guide

Here is a partial table of contents for the new Developers Guide. Topics that are new to this version of the Guide are flagged with the word [NEW].

BIOS Overview, including the BIOS data area

BIOS Interrupts

Int 02..08

Int 09 Keyboard Translate

Int 0A Hornet Hardware Interrupts

Int 10 Video Services

Int 11..14 (Equipment..Serial Port)

Int 15 System Services

Int 16..1F (Keyboard,Printer,Time,Graphics)

Int 4A Alarm Interrupt

Int 63 Execute In-Place Services

Battery Considerations, Power Management

System Manager Overview

Structure of EXM Files

Task Management + Task Control Blocks [NEW]

Intertask Communication [NEW]

Memory Management [NEW]'

DOS, TSRs, and SysMgr [NEW]

Developing an Application [NEW]

Application Control [NEW]

System Manager Services

API Management

Clipboard Management

Collating Sequence

Communication Services

Date and Time Services

Event Management [NEW]

File I/O

Help Services

Memory Management

Miscellaneous Services

Printer Services

Process Management

Resource Services

Sound Services

LHAPI (Lotus Handheld API)

Overview [NEW]

LHAPI Structures [Revised]

Messages [Revised]

Call Descriptions [Revised]

LHAPI Base Classes

Built-in Classes

Object, Dialog Control, ListBox,

Special Purpose (Time/Date Edit,Path, DirList,

Progress Meter, TitleBar) [Some NEW]

Menu Classes

High Level Classes

Dialog Box, Multiedit, Messages, and

File Open Dialog Box.

Database Formats [NEW]

Structures Used in the Database

Database Records

Sample Database

Appointment Book Overview

Database Programming (Functions)

Miscellaneous (Sorting, OmniBook Files, User Defined Records)



Startup File Processing, Internal, External

Commands, Disk Device Drivers, Power Mgt.


Hardware Overview, Power Guidelines,

Software Architecture, Wakeup, Example

Hardware Overview

Block Diagram

I/O Address Summary

Hardware Components, CPU Bus Interface,

Memory Controller

Display Controller

BitBlt Co-Processor

Keyboard Controller

General Purpose I/O

Serial Communication

Interrupt Control


Oscillators, Clock, A to D Converter

Working With the IC

Power Management

Hardware Considerations


iPhone Life magazine

Notice about Palmtop.net
The Palmtop Network with its S.U.P.E.R. (Simply Unbeatable Palmtop Essentials Repository) software is now available under the domain name of hp200lx.net.  

We Buy
We buy used palmtops, working or broken: HP 200LX, HP 100LX and 1000CX.

Copyright 2010 Thaddeus Computing Inc