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-four 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. Tournement 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! USB diagnostic program and FLASH update tool to allow coding updates in the field.