------------------------------------------------------- | Adapter to plug Tempest board into Gravitar harness | ------------------------------------------------------- Copyright 1993 (last update: 2/94) STANDARD DISCLAIMER: The authors hereby grant permission to reproduce and distribute this document for personal use, subject to the condition that the document (along with any copyright and disclaimer notices) is not modified in any way. The opinions expressed within this document are those of the authors only and not necessarily those of their respective employer. This FAQ is provided for informational purposes only. Although the authors have made every effort to provide accurate information, they cannot guarantee the accuracy or usefulness of any of the information contained herein due to the complexity of the issues involved. The authors take no responsibility for anything arising as a result of anyone using the information provided in this FAQ, and the reader hereby absolves the authors of any and all liability arising from any activities resulting from the use of any information contained herein. GENERAL OVERVIEW: (where ------ are wires ) ----------------- ( ) ( ______ ) /-----|___|---\ /---| ( ______ are male to ) GRAVITAR /------|___|----\ /----| ( ______ male connectors ) WIRING------------|___|-----------| ( ) HARNESS \------|___|----/ \----| ( | are female ) \-----| |---/ \---| ( | edge connectors ) ( | ) ^ ^ ^ ^ ^ ^ ^ 2 female edge ^ ^ ^ ^ ^ ^ ^ 2 female edge connector that compose the connector of the ^ ^ ^ ^wires^ ^ translator part of the adapter - Tempest Gravitar wiring ^ ^ ^ ^that ^ ^----board side harness-----------^ ^ ^ translate ^ ^ 2 female edge connector that compose the 2 male to male PCB--^ ^----------------translator part of the adapter - Gravitar harness side This tech tip only addresses the part of the adapter from the "2 female edge connector that compose the translator part of the adapter - Gravitar harness side" to "2 female edge connector that compose the translator part of the adapter - Tempest board side". The "male to male PCB"s are merely pieces of PCB with straight traces from "2 female edge connector of Gravitar wiring harness" pins to "2 female edge connector that compose the translator part of the adapter - Gravitar harness side" corresponding pin right across from it. The purpose of the "male to male PCB"s are only to connect the two connectors....no translation occurs here! DETAILED INFORMATION: -------------------- NOTE: Before we start, we need to mention that for a 44 pin female edge connector (like P20 below), there will be 22 pins on each side. One side will be labelled with letters (such as P20-A) and one side will be labelled with numbers (such as P20-1). Some letters are not used as labels. So to construct the adapter all you need (besides the "male to male PCB"s mentioned in the last paragraph) is a 24 pin female edge connector (P19) and a 44 pin edge connector (P20) to act as the "2 female edge connector that compose the translator part of the adapter - Gravitar harness side" and a 30 pin edge connector (P18) and a 44 pin edge connector (P20) to act as the "2 female edge connector that compose the translator part of the adapter - Tempest board side". Yes, I realize P20 was listed twice, but it'll be clear in a minute. Oh yeah, and you'll need ALOT of wire, preferably different colors! We assume you already have the Gravitar wiring harness... Now we are ready to begin..... GRAVITAR | TEMPEST SIDE | SIDE ------------------- | | | P20 | | ----| | +5V RETURN | A |-----------------------P20-1,Z,A;P18-1,A,15,S | - SENSE | 22|_______________________ / and P20-22,Z | + SENSE | 21|----P20-22,Z?incorrect?/ | +5V REG | B |----P20-B,2,V;P18-2,R / | +5V REG | 2 |__/ / | +22V DC | 3 |----P-20-3;P18-3 / | -22V DC | 4 |----P-20-4;P18-4 / | +5V RETURN | 1 |__________________/ | | | | | | | SW GROUND | N |----P18-S | | | | | | | | | | PLAYER 2 LED| J |----P18-13 | START 2 | 11|----P18-M | | | | 10.3V UNREG | E |----P20-14 | | | | | | | | | | PLAYER 1 LED| 7 |----P18-12 | START 1 | M |----P18-11 | SW GROUND | 12|NO CONNECT | +5V | Y |----P18-R | LOCKOUT | F |NO CONNECT | COIN L | 10|----P20-6 | COIN R | U |----P20-E | COIN AUX | S |----P20-5 | CNTR L | H |----P20-12 | CNTR R | 6 |----P20-P | SELF TEST | T |----P20-7 | ----| | | | | | P19 | | ----| | AUDIO 2 | 11|----P18-D | AUDIO 1 | 12|----P18-5 | AUDIO GROUND| M |----P18-E | ROT LEFT 1 | E |----P18-9 | ROT RIGHT 1 | 5 |----P18-10 | THRUST 1 | 6 |NO CONNECT | FIRE 1 | 4 |NO CONNECT | SHIELDS 1 | 3 |NO CONNECT | Y GROUND | 2 |----P20-16 | X GROUND | 1 |----P20-U | Y OUT | B |----P20-T | X OUT | A |----P20-17 | BLUE GROUND | K |__ | GREEN GROUND| J |--\_P20-M | RED GROUND | H |__/ | BLUE | 9 |----P20-9 | GREEN | 8 |----P20-L | RED | 7 |----P20-10 | ----| ------------------- NOTE: connections between the following Tempest pins must be made: P20-V to P18-F P20-J to P20-15 P20-K to P20-S these can be most easily done by wrapping wires around from the female edge connector of the adapter (Tempest board side) back to the same connector. MORE NOTES: 1) COIN AUX button on Gravitar is connected to SLAM on Tempest 2) Put spin wheel in fire button hole...below is a diagram of the Gravitar control panel FIRE ZAP SPIN WHEEL | | | V V V _ _ _ _ /L\ /R\ /T\ /F\ \_/ \_/ \_/ \_/ _ /S\ \_/ As you can see Gravitar's Thrust and Shield are unused by Tempest. 3) Encoder wheel connects directly to Tempest connector pin 1 to P18-J, pin 4 to P18-H, pin 2 to P18-R and pin 3 to P18-S. CREATED BY: Rick Schieve (3/8/93). TYPED/EDITTED BY: Steve Ozdemir (3/13/93)