Document Title: [Tempest Tech.html (html file)]
P20: 44-pin edge connector
component side solder side
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+5VDC RETURN A 1 +5VDC RETURN
+5VDC B 2 +5VDC
C 3 +22VDC
D 4 -22VDC
COIN R E 5 SLAM
COIN C F 6 COIN L
DIAG STEP H 7 SELF TEST
X INV J 8 OUT 5 (not used)
Y INV K 9 BLUE
GREEN L 10 RED
VIDEO GND M 11 MONOCHROME VIDEO
COIN CTR R N 12 COIN CTR L
COIN CTR C P 13 PWR GND
PWR GND R 14 +10.3 VDC UNREG
Y INVERT S 15 X INVERT
X OUT T 16 X GND
Y GND U 17 Y OUT
~RESET V 18 E (2.4 kHz clock)
-22VDC W 19
+22VDC X 20
+5VDC Y 21 +SENSE (+5V)
+5VDC RETURN Z 22 -SENSE (GND)
C, D, 19 & 20 appear to be unused
P18: 30-pin edge connector
component side solder side
-------------- -----------
+5VDC RETURN A 1 +5VDC RETURN
+5VDC B 2 +5VDC
~COCK C 3 +22VDC
AUDIO- D 4 -22VDC
AUDIO- RETURN E 5 AUDIO+
~RESET F 6 AUDIO+ RETURN
CLK1 H 7 CLK2
DIR1 J 8 DIR2
FIRE2 K 9 FIRE1
ZAP2 L 10 ZAP1
P2 START M 11 P1 START
-22VDC N 12 P1 LED
+22VDC P 13 P2 LED
+5VDC R 14 +5VDC
+5VDC RETURN S 15 +5VDC RETURN
Notes:
------
"RETURN" pins are ground, but specifically for the voltages
indicated.
Ground ~COCK if you're installing in a cocktail table, and
connect X INV to X INVERT and Y INV to Y INVERT. Hook up a 2nd
set of controls to CLK2, DIR2, FIRE2 and ZAP2 and the game will
"flip" for 2 player games.
GAME OPTIONS:
(8-position switch at L12 on Analog Vector-Generator PCB)
1 2 3 4 5 6 7 8 Meaning
-------------------------------------------------------------------------
Off Off 2 lives per game
On On 3 lives per game
On Off 4 lives per game
Off On 5 lives per game
On On Off Bonus life every 10000 pts
On On On Bonus life every 20000 pts
On Off On Bonus life every 30000 pts
On Off Off Bonus life every 40000 pts
Off On On Bonus life every 50000 pts
Off On Off Bonus life every 60000 pts
Off Off On Bonus life every 70000 pts
Off Off Off No bonus lives
On On English
On Off French
Off On German
Off Off Spanish
On 1-credit minimum
Off 2-credit minimum
GAME OPTIONS:
(4-position switch at D/E2 on Math Box PCB)
1 2 3 4 Meaning
-------------------------------------------------------------------------
Off Minimum rating range: 1, 3, 5, 7, 9
On Minimum rating range tied to high score
Off Off Medium difficulty (see notes)
Off On Easy difficulty (see notes)
On Off Hard difficulty (see notes)
On On Medium difficulty (see notes)
PRICING OPTIONS:
(8-position switch at N13 on Analog Vector-Generator PCB)
1 2 3 4 5 6 7 8 Meaning
-------------------------------------------------------------------------
On On On No bonus coins
On On Off For every 2 coins, game adds 1 more coin
On Off On For every 4 coins, game adds 1 more coin
On Off Off For every 4 coins, game adds 2 more coins
Off On On For every 5 coins, game adds 1 more coin
Off On Off For every 3 coins, game adds 1 more coin
On Off Off On Demonstration Mode (see notes)
Off Off Off On Demonstration-Freeze Mode (see notes)
On Left coin mech * 1
Off Left coin mech * 2
On On Right coin mech * 1
On Off Right coin mech * 4
Off On Right coin mech * 5
Off Off Right coin mech * 6
Off On Free Play
Off Off 1 coin 2 plays
On On 1 coin 1 play
On Off 2 coins 1 play
GAME SETTING NOTES:
-------------------
Demonstration Mode:
- Plays a normal game of Tempest, but pressing SUPERZAP sends you
directly to the next level.
Demonstration-Freeze Mode:
- Just like Demonstration Mode, but with frozen screen action.
Both Demonstration Modes:
- Pressing RESET in either mode will cause the game to lock up.
To recover, set switch 1 to On.
- You can start at any level from 1..81, so it's an easy way of
seeing what the game can throw at you
- The score is zeroed at the end of the game, so you also don't
have to worry about artificially high scores disrupting your
scoring records as stored in the game's EAROM.
Easy Difficulty:
- Enemies move more slowly
- One less enemy shot on the screen at any given time
Hard Difficulty:
- Enemies move more quickly
- 1-4 more enemy shots on the screen at any given time
- One more enemy may be on the screen at any given time
High Scores:
- Changing toggles 1-5 at L12 (more/fewer lives, bonus ship levels)
will erase the high score table.
- You should also wait 8-10 seconds after a game has been played
before entering self-test mode or powering down; otherwise, you
might erase or corrupt the high score table.
TEMPEST
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HEX R/W D7 D6 D5 D4 D3 D2 D2 D0 function
0000-7FFF R/W D D D D D D D D program ram (2K)
0800-080F W D D D D Colour ram
0C00 R D Right coin sw
0C00 R D Center coin sw
0C00 R D Left coin sw
0C00 R D Slam sw
0C00 R D Self test sw
0C00 R D Diagnostic step sw
0C00 R D Halt
0C00 R D 3khz ??
0D00 R D D D D D D D D option switches
0E00 R D D D D D D D D option switches
2000-2FFF R/W D D D D D D D D Vector Ram (4K)
3000-3FFF R D D D D D D D D Vector Rom (4K)
4000 W D Right coin counter
4000 W D left coin counter
4000 W D Video invert - x
4000 W D Video invert - y
4800 W Vector generator GO
5000 W WD clear
5800 W Vect gen reset
6000-603F W D D D D D D D D EAROM write
6040 W D D D D D D D D EAROM control
6040 R D Mathbox status
6050 R D D D D D D D D EAROM read
6060 R D D D D D D D D Mathbox read
6070 R D D D D D D D D Mathbox read
6080-609F W D D D D D D D D Mathbox start
60C0-60CF R/W D D D D D D D D Custom audio chip 1
60D0-60DF R/W D D D D D D D D Custom audio chip 2
60E0 R D one player start LED
60E0 R D two player start LED
60E0 R D FLIP
9000-DFFF R D D D D D D D D Program ROM (20K)
notes: program ram decode may be incorrect, but it appears like
this on the schematics, and the troubleshooting guide.
ZAP1,FIRE1,FIRE2,ZAP2 go to pokey2 , bits 3,and 4
(depending on state of FLIP)
player1 start, player2 start are pokey2 , bits 5 and 6
encoder wheel goes to pokey1 bits 0-3
pokey1, bit4 is cocktail detect
