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GOTTLIEB SYSTEM 1 CPU BOARD
The System 1 Board 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:
➡️Direct replacement of the original System1 board.
➡️Enhanced switch input circuitry preventing damage to the board from playfield wiring issues.
➡️All game code completely re-written (with some minor original Gottlieb glitches omitted!)
➡️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 configured 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.
➡️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 threshold calculation and adjustment.
🔘Tournament mode - Special award replaced with points
🔘Operator set Ball Save time!
🔘Million point scores shown in scrolling display.
🔘Idle mode animation.
🔘Skill shot option.
🔘Four high score memory.
🔘Restore factory-settings option for quick reset of settings.
🔘Wizard mode for some games
➡️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!
Works in ALL of these classic pinball machines:
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