Once you've installed the SDK, you'll notice some changes to your development environment.

• Basic Requirements
• Emulator: See GEOS-SC on your PC
• Directory Structure

Basic Requirements

To develop GEOS-SC software you'll need:

• The GEOS-SC Software Development Kit or "SDK"
• Microsoft Visual C++ 5.0 (Professional Edition recommended)
• Microsoft Windows NT 4.0, with Service Pack 3

The GEOS-SC SDK requires Microsoft Visual C++ running on Window NT 4.0 (Service Pack 3). Combined with Visual C++, the SDK is a powerful, graphical integrated development environment.

Emulator

In the GEOS-SC SDK program group, there is a shortcut to GeosSC.dsw, the GEOS-SC Workspace file. This file tells Microsoft Visual C++ how to build and execute GEOS-SC. With the GeosSC.dsw workspace open, you can build and execute a GEOS-SC emulator. To see this, use Visual C++ to open the GeosSC.dsw workspace. Build () the executable and execute () it.

The GEOS-SC emulator allows most development work (except hardware integration) to be done in Windows NT. The emulation environment consists of

GEOS-SC display window

Simulates the device screen and touch-screen

DOS shell

GeosSC.exe writes some information to the shell. You can see it here.

GEOS-SC console

You can type special debugging commands here.

power control simulator

This window allows you to simulate the device's power supply: you can simulate shutdown, power-up, and battery drain.

You can use the GEOS-SC display window the same way that a user uses the target device. To switch between compiled applications, make the display window active, press the F1 key, select an application, and press the "Switch to" button.

Directory Structure

GEOS-SC consists of three primary branches of development: the appl (application) directory, the library directory, and the driver directory.

• The appl directory contains the applications.
• The library directory contains libraries which applications, drivers, and other libraries will use. Any libraries you write belong in this directory.
• The driver directory contains drivers. Any drivers specific to your device belong in this directory.

Other SDK directories are

• The bin directory contains the tools that the SDK uses.
• The docs directory contains a set of English and Japanese GEOS-SC documentation. Not all documentation has been translated to Japanese; because of this, the docs/japanese directory contains some English documentation.
• The include directory contains GEOS-SC header files.
• The ntstore directory represents the persistent storage on the target device. It holds application files, database files, and registry files.