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:

Key Benefits

• 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!)
• Twenty-nine 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 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 (for some games).
  • 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!
• USB diagnostic program and FLASH update tool to allow coding updates in the field.