Gottlieb System 1 - Ni-Wumpf MPU Mk-2 - 2023

The new (2023 design - latest code as of Aug, 2024) Ni-Wumpf System 1 board MKII is a plug-in replacement for the original Gottlieb System 1 CPU.  It supports all of the games in the platform series, and provides considerable diagnostic capability for the technician when troubleshooting where a game may be malfunctioning.  The entire game software has been re-written with an emphasis on maintaining the timing and compatibility of the original board, however with quite a bit more functionality added in:

Key Benefits

• Download the manual here!
• Direct replacement of the original System1 board.
• Enhanced switch input circuitry preventing damage to the board from playfield wiring issues.
• 3-month warranty.
• All game code completely re-written (with some minor original Gottlieb glitches omitted!)
• Eighteen years in business with thousands of boards sold internationally.
• Text based diagnostics menu system that allows operator settings previously done via DIP switches to be entered via front door switches.
• Tests that cycle repeatedly (until timeout) to help isolate faults.
• Enhanced use of high reliability surface-mount components with off-the-shelf thru-hole components at the edge for ease of serviceability.
• Display test to exercise all digit segments (numbers), and to strobe each digit independently to check for display (UDN6118) shorts.
• Solenoid test that exercises each coil including lamp controlled coils (when DIP switch configuration set for such a game)
• Enhanced switch test to identify stuck switches.
• Power-up code revision and game setting displayed for quick diagnostic configuration identification.
• Switch test that detects dirty switches on the playfield.
• All 16 System 1 games are included on one board with no ROM swapping required.
• Original MPU functionality has been closely duplicated and adds many optional features including:
  • Free game mode
  • Updated game options for many games to allow add-a-ball mode (multiple free-balls awarded during a single ball) where the playfield challenge is completely reset once after scoring the free-ball / special.
  • Menu options to disable add-a-ball (for operators who requested it!)
  • Automatic scoring threshold adjustment.
  • Ball Save!
  • Million point scoring.
  • Idle mode animation.
  • Skill shot option.
  • Four high scores memory.
  • Restore factory-settings option for quick reset of settings.
• Open-collector output logic with zener diode protection for all solenoid circuits and lamp select lines to prevent CPU damage from a damaged driver board.
• Battery-less operation - all settings and high-score data are stored in FLASH with >100,000 write cycles.
• Designed for low-cost component repair and maintenance on I/O sensitive components (exposed to bad displays / bad driver boards, etc.)
• Stuck switches are ignored and do not impair the rest of the games operation, including the slam switch!

System 1 Game Name	Game #	Prom used	Date Manufactured	Number made
Cleopatra	409	409 or A	2/1978	7,300
Sinbad	412	B	5/1978	12,950
Joker Poker	417	C	8/1978	9,280
Dragon	419	D	11/1978	6,550
Solar Ride	421	E	3/1979	9,165
Count Down	422	F	6/1979	9,899
Close Encounters	424	G	10/1978	9,950
Charlie's Angels	425	H	1/1979	7,600
Pinball Pool	427	I	8/1979	7,200
Totem	429	J	10/1979	6,643
Incredible Hulk	433	K	10/1979	6,150
Genie	435	L or M	8/1979	6,800
Buck Rogers	437	N	12/1979	7,410
Torch	438	P	2/1980	3,880
Roller Disco	440	R	2/1980	2,400
Asteroid Annie	442	S	8/1980	211

We still repair the old Gottlieb® System 1 MPUs and other boards as used in those games...
(The chart was built from info in the Gottlieb® parts books and Mr. Pinball's reference guide)

Sometimes spelled as Ni-Wumph, or Niwumpf...