
                  Advanced Gravis Computer Technology Ltd.

                GrIP(tm) Development Package V1.0 [Release]

        Copyright (C) 1995 by Advanced Gravis Computer Technology Ltd.
                           All Rights Reserved

=============================================================================

Introduction
------------
Thank you for your interest in GrIP (Gravis Interface Protocol). We are
very excited about the technology and the world of possibilities it opens
for software developers. You are no longer limited to the 2 joystick,
2 button limit on the existing PC gameport. GrIP allows multiple input
devices on the PC.

With GrIP it is possible to connect multiple control devices (>2) each
with multiple buttons (>2) through a standard gameport while freeing
yourself from the worries of calibration, speed compensation and the
tremendous drain that reading a regular joystick places on the CPU
(~10-12% vs GrIP's less than 1% for 4 controllers!).

Software Packages
-----------------
There are currently 4 parts to the GrIP package.

GrIP V1.0 SDK   Software Developers Toolkit (this package)
GrIP Win'95     Win'95 Direct Input drivers
                GrIPkey Keyboard Emulator
                Gravis Utilities - Joystick Calibration & Testing
                GrIP Loadable Library (GRIP.GLL)
GrIP DOS        Gravis Utilities - Joystick Calibration & Testing
                GrIP Loadable Library (GRIP.GLL)
GrIP CD         Includes both the DOS & Win'95 software as well
                as games, images of our products (incl. GrIP MultiPort
                and GrIPpad), and online user documentation.

GrIP Modes of Operation
-----------------------

1. Pass-Through Mode (LEDs Off & Green)

In this mode the unit acts like a standard joystick Y- adapter.  One or two
standard PC joysticks can be connected to the DB-15 connectors on the
interface box and used in this mode.

2. Emulation Mode (LEDs Red & Off)

In emulation mode, the device is intelligent.  It reads the state of the
connected GrIP controllers and emulates standard PC GamePads.  One to four
GrIP compatible controllers can be plugged into the unit's 9-pin
connectors.  The unit scans the four connectors for active controllers.  
The controller on the lowest numbered connector becomes Joystick A. See
the user documentation for the functionality of each of the ports.

3. GrIP Mode (LED Green & Off)

This is the native mode for the device. In this mode, joysticks are read
using the GrIP API calls.

Contact Information
-------------------
This package is provided freely as such major support is not given. If
you have questions feel free to email john.smith@gravis.com or FAX
604-431-5155.

Files Included
--------------
\DEMO             Sample code and source that gives you an example of
                  using the GrIP API. To build this code, compile
                  and link all of the .C files using Watcom C++ V10.
GRIP_SDK.DOC      GrIP's API documentation - Word 6 format.
GRIPIMGS.ZIP      GrIP Logos for use on packaging & manuals. These
                  images may not be altered in any manner. There
                  are some additional images on the GrIP CD.
README.EXE        Readme viewer
README            This file

Revision History
----------------
V1.00 Apr'95    Computer Game Developers Conference
                - First release
V1.01 May'95    E3
                - Added NBA Live '95 patch demo
                - Dropped trickle mode - improved burst mode
                - Griptest now works with proportional controllers
V1.02 July'95   Development Tour
                - Version of new Pandora API that will work with
                  existing hardware units.
                - Demo program which uses updated Pandora API
                - Updated README to reflect latest changes in
                  software, hardware and final product.
V2.01 Aug '95   Gravis Loadable Library w/TSR
                - Uses the new GLL but still requires the TSR
                - Removed Borland C++ support
V1.0 GrIP Nov 6 Comdex Release
                - First Developer Release of GrIP Full API
                  using the production GrIP hardware
                - GrIP Logos for Packaging & Manuals

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