Gottlieb System 80 - Revision history

Chibler: /* Reset Board */

2026-10-13T22:38:12Z

Reset Board

← Older revision		Revision as of 17:38, 13 October 2026
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	===Reset Board===		===Reset Board===
	[[File:Gtb sys80 reset.JPG\|thumb\|left\|300px\|Gottlieb® System 80 / 80B MA-980 Reset Board]]		[[File:Gtb sys80 reset.JPG\|thumb\|left\|300px\|Gottlieb® System 80 / 80B MA-980 Reset Board. <i>Image courtesy of Jim Palson</i>]]
	[[File:GTB Sys80B Newer Reset Board.jpg\|thumb\|right\|300px\|Gottlieb® System 80B MA-1143 Reset/Anti-Static Board]]<br>		[[File:GTB Sys80B Newer Reset Board.jpg\|thumb\|right\|300px\|Gottlieb® System 80B MA-1143 Reset/Anti-Static Board. <i>Image courtesy of Jim Palson</i>]]<br>
	Starting with Devil's Dare, the first System 80A game, the reset board became a staple of the Gottlieb® design to automatically reset the CPU board should the CPU lock up. Apparently games locking up on location was an issue with System 80 games. The reset board was created to resolve this issue, should the game lock up, and no one is present to manually reset the game by shutting it off and turning it back on.<br>		Starting with Devil's Dare, the first System 80A game, the reset board became a staple of the Gottlieb® design to automatically reset the CPU board should the CPU lock up. Apparently games locking up on location was an issue with System 80 games. The reset board was created to resolve this issue, should the game lock up, and no one is present to manually reset the game by shutting it off and turning it back on.<br>

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	[[File:GTBResetBoardConnector.jpg\|thumb\|left\|300px\|Connection at TC1 to the reset board.]]		[[File:GTBResetBoardConnector.jpg\|thumb\|left\|300px\|Connection at TC1 to the reset board. <i>Image courtesy of Chris Hibler</i>]]
	[[File:GTB_RW_3K_Pullup.JPG\|thumb\|right\|300px\|A 3.0Kohm resistor, added between pins 7 and 11 of TC1.]]<br>		[[File:GTB_RW_3K_Pullup.JPG\|thumb\|right\|300px\|A 3.0Kohm resistor, added between pins 7 and 11 of TC1. <i>Image courtesy of Jim Palson</i>]]<br>
	Along with adding the reset board, Gottlieb® added a 3.0Kohm resistor across pins 7 and 11 of the reset board connection at MPU connector TC1. If not using the reset board, it's advised to add this resistor to the back of the board, as shown at right. This resistor pulls the R/W (read/write) line high when not pulled down by the 6502.		Along with adding the reset board, Gottlieb® added a 3.0Kohm resistor across pins 7 and 11 of the reset board connection at MPU connector TC1. If not using the reset board, it's advised to add this resistor to the back of the board, as shown at right. This resistor pulls the R/W (read/write) line high when not pulled down by the 6502.

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	Do realize that even though this problem exists on all System 80/80A/80B boards but only a very small fraction of these Gottlieb boards exhibit any symptoms. The chances that you have one if these that exhibit symptoms is quite slim.<br clear=all>		Do realize that even though this problem exists on all System 80/80A/80B boards but only a very small fraction of these Gottlieb boards exhibit any symptoms. The chances that you have one if these that exhibit symptoms is quite slim.<br clear=all>


	===Game ROMs===		===Game ROMs===

Chibler: /* Display Test - System 80B */

2026-10-13T22:36:25Z

Display Test - System 80B

← Older revision		Revision as of 17:36, 13 October 2026
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	=====Display Test - System 80B=====		=====Display Test - System 80B=====
	[[File:Gtb alphanum display test.gif\|thumb\|left\|300px\|Simulation of System 80B display test]]<br><br><br>		[[File:Gtb alphanum display test.gif\|thumb\|left\|300px\|Simulation of System 80B display test. <i>Image courtesy of Jim Palson</i>]]<br><br><br>
	Display test is test number 20 for System 80B. All 40 of the alpha-numeric "digits" (both the top and bottom displays) will light starting with a "0", next a "+", then an "X", and finally a ",". In doing this, all possible segments of all the display digits are lit at one point during display test.		Display test is test number 20 for System 80B. All 40 of the alpha-numeric "digits" (both the top and bottom displays) will light starting with a "0", next a "+", then an "X", and finally a ",". In doing this, all possible segments of all the display digits are lit at one point during display test.
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Chibler: /* Speakers */

2026-10-13T22:35:49Z

Speakers

← Older revision		Revision as of 17:35, 13 October 2026
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	===Speakers===		===Speakers===
	[[File:Panthera Head Speaker.jpg\|thumb\|left\|300px\|Typical speaker located in the head of a System 80 game (Panthera)]]<br>		[[File:Panthera Head Speaker.jpg\|thumb\|left\|300px\|Typical speaker located in the head of a System 80 game (Panthera). <i>Image courtesy of Jim Palson</i>]]<br>
	System 80 games use a dual speaker system. In most cases, (where there is a grill above the backglass), there is a 6-1/2", 8 ohm, low wattage speaker in the lower cabinet, and a second one in the head, behind the grill in the backbox. Some games, like Haunted House, have two speakers in the lower cabinet.		System 80 games use a dual speaker system. In most cases, (where there is a grill above the backglass), there is a 6-1/2", 8 ohm, low wattage speaker in the lower cabinet, and a second one in the head, behind the grill in the backbox. Some games, like Haunted House, have two speakers in the lower cabinet.
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	[[File:GTB-80a-the-games-speaker.jpg\|thumb\|left\|300px\|Single speaker from an 80A game (The Games)]]<br>System 80A games may have two speakers or just one. Again, these are 6-1/2", 4 ohm, low wattage speakers.		[[File:GTB-80a-the-games-speaker.jpg\|thumb\|left\|300px\|Single speaker from an 80A game (The Games). <i>Image courtesy of Jim Palson</i>]]<br>System 80A games may have two speakers or just one. Again, these are 6-1/2", 4 ohm, low wattage speakers.
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	[[File:GTB Tag Team Speaker.jpg\|thumb\|left\|300px\|Single speaker from an early 80B game (Tag Team)]]<br>		[[File:GTB Tag Team Speaker.jpg\|thumb\|left\|300px\|Single speaker from an early 80B game (Tag Team). <i>Image courtesy of Jim Palson</i>]]<br>
	Early System 80B games, Chicago Cubs, Tag Team, and Bounty Hunter, all use a single 6-1/2" 4 ohm speaker in the lower cabinet.		Early System 80B games, Chicago Cubs, Tag Team, and Bounty Hunter, all use a single 6-1/2" 4 ohm speaker in the lower cabinet.

Chibler: /* System 80B Auxiliary Sound Board */

2026-10-13T22:34:42Z

System 80B Auxiliary Sound Board

← Older revision		Revision as of 17:34, 13 October 2026
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	There are two versions of the auxiliary sound board.		There are two versions of the auxiliary sound board.

	[[Image:MA1033AuxSound.jpg\|300px\|thumb\|left\|Gottlieb® System 80B MA-1033 Auxiliary Sound Board]]<br>		[[Image:MA1033AuxSound.jpg\|300px\|thumb\|left\|Gottlieb® System 80B MA-1033 Auxiliary Sound Board. <i>Image courtesy of Chris Hibler</i>]]<br>
	The MA-1033 auxiliary sound board was used in System 80B games including: Bad Girls, Big House, and Hot Shots, as well as one System 3 game: Lights, Camera, Action.		The MA-1033 auxiliary sound board was used in System 80B games including: Bad Girls, Big House, and Hot Shots, as well as one System 3 game: Lights, Camera, Action.
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	[[File:GTB Sys3 sound MA-1294.JPG\|300px\|thumb\|left\|Gottlieb® System 80B MA-1294 Auxiliary Sound Board]]		[[File:GTB Sys3 sound MA-1294.JPG\|300px\|thumb\|left\|Gottlieb® System 80B MA-1294 Auxiliary Sound Board. <i>Image courtesy of Chris Hibler</i>]]
	The MA-1294 auxiliary sound board was only used in one System 80B game, Bone Busters, as well as System 3 games including: Hoops, Bell Ringer, Silver Slugger, Car Hop, Deadly Weapon, Title Fight, and Vegas.		The MA-1294 auxiliary sound board was only used in one System 80B game, Bone Busters, as well as System 3 games including: Hoops, Bell Ringer, Silver Slugger, Car Hop, Deadly Weapon, Title Fight, and Vegas.
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Chibler: /* Sound Only Board with Piggyback */

2026-10-13T22:23:05Z

Sound Only Board with Piggyback

← Older revision		Revision as of 17:23, 13 October 2026
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	====Sound Only Board with Piggyback====		====Sound Only Board with Piggyback====
	[[File:GottliebSystem80ABSoundsOnlyWithPiggyback.jpg ‎\|300px\|thumb\|left\|Gottlieb® System 80A/80B Sound Board MA-490 w/MA-488 Piggyback Board (Sounds only)]]		[[File:GottliebSystem80ABSoundsOnlyWithPiggyback.jpg ‎\|300px\|thumb\|left\|Gottlieb® System 80A/80B Sound Board MA-490 w/MA-488 Piggyback Board (Sounds only). <i>Image courtesy of Chris Hibler</i>]]
	[[File:Gtb piggyback sound factory trace wire.JPG\|300px\|thumb\|right\|Gottlieb® System 80A/80B Sound Board w/Factory Trace Wire]]		[[File:Gtb piggyback sound factory trace wire.JPG\|300px\|thumb\|right\|Gottlieb® System 80A/80B Sound Board w/Factory Trace Wire. <i>Image courtesy of Jim Palson</i>]]
	[[File:GottliebSoundsOnlyCut.jpg ‎\|300px\|thumb\|left\|Gottlieb® System 80A/80B Sound Board w/Factory "cut"]]		[[File:GottliebSoundsOnlyCut.jpg ‎\|300px\|thumb\|left\|Gottlieb® System 80A/80B Sound Board w/Factory "cut". <i>Image courtesy of Chris Hibler</i>]]

	To reduce costs even more, Gottlieb® started using a modified sound only board originally released with Spiderman in 1980. This "new" sound board was used during the production of Amazon Hunt, and continued until Tag Team Pinball. The main modification of the board was the addition of a piggyback board. The piggyback board was used to increase the size of the sound ROM by using a 2716 EPROM. The original game ROM location was neither socketed or stuffed.<br>		To reduce costs even more, Gottlieb® started using a modified sound only board originally released with Spiderman in 1980. This "new" sound board was used during the production of Amazon Hunt, and continued until Tag Team Pinball. The main modification of the board was the addition of a piggyback board. The piggyback board was used to increase the size of the sound ROM by using a 2716 EPROM. The original game ROM location was neither socketed or stuffed.<br>

Chibler: /* Sound Only Board with Piggyback */ Additional info on sounds only & sounds only with piggyback cards

2026-10-13T22:19:56Z

Sound Only Board with Piggyback: Additional info on sounds only & sounds only with piggyback cards

← Older revision		Revision as of 17:19, 13 October 2026
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	Two other noteworthy modifications are an added factory trace wire on the solder side of the board, and a cut trace between pin 8 of U7 (7404) and a header pin on the component side of the board. The added trace wire runs from pin 3 of U1 (6503 CPU) to pin 18 of U2 (piggyback header pins). Both of these modifications should remain intact for the board to function properly.<br>		Two other noteworthy modifications are an added factory trace wire on the solder side of the board, and a cut trace between pin 8 of U7 (7404) and a header pin on the component side of the board. The added trace wire runs from pin 3 of U1 (6503 CPU) to pin 18 of U2 (piggyback header pins). Both of these modifications should remain intact for the board to function properly.<br>

			This modification connects pin 18 of the daughter card, which is used by the 6530 and the 74LS112 at U10 on the daughter card to send an interrupt to the 6503. It also removes the spare connection from the 7404 at U7 on the base card to pin 18 of the piggyback card.

	It is also worth mentioning that this is one of the few instances where Gottlieb® used a double-sided piggyback board. The benefit of using a double-sided board is the decreased chance of cracked header pins, where the header pins attach to the underside of the piggyback board.		It is also worth mentioning that this is one of the few instances where Gottlieb® used a double-sided piggyback board. The benefit of using a double-sided board is the decreased chance of cracked header pins, where the header pins attach to the underside of the piggyback board.

Chibler: /* Remote Mounted Transistors */

2026-10-08T16:24:30Z

Remote Mounted Transistors

← Older revision		Revision as of 11:24, 8 October 2026
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	<u><b>Note:</b></u> Solenoids which use a remote mounted transistor can be enabled by temporarily connecting the associated driver board pre-drive transistor's tab to ground. This test is typically performed to test the integrity of the wiring and edge connectors from the drive transistor to the remotely mounted transistor and to the solenoid. This test does not prove that the pre-drive transistor is good since grounding a transistor tab bypasses the transistor's internal switch.<br clear=all>		<u><b>Note:</b></u> Solenoids which use a remote mounted transistor can be enabled by temporarily connecting the associated driver board pre-drive transistor's tab to ground. This test is typically performed to test the integrity of the wiring and edge connectors from the drive transistor to the remotely mounted transistor and to the solenoid. This test does not prove that the pre-drive transistor is good since grounding a transistor tab bypasses the transistor's internal switch.<br clear=all>

			[[File:GottliebUnderPFTransistors.jpg\|500px\|thumb\|left\|Another image/schematic/explanation (click). <i>Image courtesy of Chris Hibler</i>]]<br>
			Another diagram detailing remote mounted transistor connections, etc.<br clear=all>

	=====Remote Mounted Transistor Update=====		=====Remote Mounted Transistor Update=====

Chibler: /* Remote Mounted Transistors */

2026-10-08T16:18:45Z

Remote Mounted Transistors

← Older revision		Revision as of 11:18, 8 October 2026
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	<u><b>Note:</b></u> Solenoids which use a remote mounted transistor ~~cannot~~ be enabled by temporarily ~~grounding~~ the pre-drive transistor's tab to ground. This test is typically performed to ~~check~~ the integrity of the wiring from the drive transistor to the solenoid. This test ~~however~~ does not ~~confirm if~~ the drive transistor is good ~~or not~~. <br clear=all>		<u><b>Note:</b></u> Solenoids which use a remote mounted transistor can be enabled by temporarily connecting the associated driver board pre-drive transistor's tab to ground. This test is typically performed to test the integrity of the wiring and edge connectors from the drive transistor to the remotely mounted transistor and to the solenoid. This test does not prove that the pre-drive transistor is good since grounding a transistor tab bypasses the transistor's internal switch.<br clear=all>

	=====Remote Mounted Transistor Update=====		=====Remote Mounted Transistor Update=====

Chibler: /* Ground Improvements for System 80A / 80B at the Transformer Panel - "The Games" to "Bounty Hunter" */

2026-09-30T21:26:16Z

Ground Improvements for System 80A / 80B at the Transformer Panel - "The Games" to "Bounty Hunter"

← Older revision		Revision as of 16:26, 30 September 2026
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	====Recommended Ground Improvements for System 80B====		====Recommended Ground Improvements for System 80B====

	=====Ground Improvements for System 80A / 80B at the Transformer Panel - "The Games" to "~~Bounty Hunter~~"=====		=====Ground Improvements for System 80A / 80B at the Transformer Panel - "The Games" to "Chicago Cubs Triple Play"=====
			Games included in this range:<br>
			*The Games
			*El Dorado City of Gold
			*Touchdown
			*Ice Fever
			*Bounty Hunter
			*Chicago Cubs Triple Play

	After Alien Star, Gottlieb® either soldered wire leads directly to the male spade connector board on the transformer panel (games like Chicago Cubs), or used female spade connectors (games like The Games, Touchdown, and Ice Fever), and used square, inline 9-pin Molex connectors to connect to the wiring harness. These connections, if the pins in the connectors are in good shape, are solid and do not require upgrade or modification.		After Alien Star, Gottlieb® either soldered wire leads directly to the male spade connector board on the transformer panel (games like Chicago Cubs), or used female spade connectors (games like The Games, Touchdown, and Ice Fever), and used square, inline 9-pin Molex connectors to connect to the wiring harness. These connections, if the pins in the connectors are in good shape, are solid and do not require upgrade or modification.

Chibler: /* Ground Improvements for System 80B at the Transformer Panel - "Tag Team Pinball" to "Spring Break" */

2026-09-30T21:23:17Z

Ground Improvements for System 80B at the Transformer Panel - "Tag Team Pinball" to "Spring Break"

← Older revision		Revision as of 16:23, 30 September 2026
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	=====Ground Improvements for System 80B at the Transformer Panel - "Tag Team Pinball" to "Spring Break"=====		=====Ground Improvements for System 80B at the Transformer Panel - "Tag Team Pinball" to "Spring Break"=====

	Games in this range:<br>		Games included in this range:<br>
	*Tag-Team Pinball		*Tag-Team Pinball
	*Rock		*Rock