Legacy Pinball Machine Wifi Retrofit Device

This application claims priority to U.S. provisional patent application Ser. No. 63/780,368, filed on Mar. 30, 2025 and entitled LEGACY PINBALL MACHINE WIFI RETORFIT DEVICE, the entire contents of which are hereby incorporated by reference.

The present disclosure generally relates to electronic gaming systems and retrofit interface devices, and more particularly to systems, methods, and electronic devices for interfacing with legacy entertainment machines to enable data access, remote connectivity, and enhanced operational functionality.

Conventional legacy entertainment machines, such as pinball and arcade systems, typically lack network connectivity and advanced data-tracking capabilities, relying primarily on local score storage and limited player identification. As a result, these machines generally cannot support remote monitoring, online score sharing, or enhanced digital functionality without costly modification or replacement of existing hardware.

Various implementations disclosed herein include devices, systems, and methods for retrofitting legacy entertainment machines with an interface device configured to intercept, read, and selectively modify processor bus communications to enable remote connectivity, enhanced data access, and expanded operational functionality. The device may be installed within existing hardware sockets, such as a processor or memory socket, allowing integration without substantial modification to the original system while preserving normal machine operation.

In one embodiment, the invention is a circuit board including a first connector configured to be communicatively coupled to a processor, wherein program instructions are executed on the processor in accordance with a predetermined operational timing and control flow. The circuit board further includes a second connector configured to be communicatively coupled to a main circuit board, and circuitry electrically connected between the first connector and the second connector. The circuitry is configured to pass, via a first mode of operation, signals from the processor to the circuit board, and selectively provide, via a second mode of operation, data from the circuit board to the processor.

In accordance with common practice the various features illustrated in the drawings may not be drawn to scale. Accordingly, the dimensions of the various features may be arbitrarily expanded or reduced for clarity. In addition, some of the drawings may not depict all of the components of a given system, method or device. Finally, reference numerals may be used to denote like features throughout the specification and figures.

Numerous details are described in order to provide a thorough understanding of the example implementations shown in the drawings. However, the drawings merely show some example aspects of the present disclosure and are therefore not to be considered limiting. Those of ordinary skill in the art will appreciate that other effective aspects and/or variants do not include all of the specific details described herein. Moreover, well-known systems, methods, components, devices and circuits have not been described in exhaustive detail so as not to obscure more pertinent aspects of the example implementations described herein.

The present disclosure may relate to systems and devices for retrofitting legacy electronic game machines with enhanced data access, storage, and communication functionality while preserving original hardware operation. In particular, the disclosure may relate to a hardware interposer device configured to electrically interface between a processor and a main circuit board of a legacy game machine, enabling observation, storage, transmission, and selective manipulation of operational data such as scores, gameplay state information, and diagnostic signals without modifying program instructions executed by the processor.

1 FIG. 110 120 110 104 106 108 120 illustrates an exemplary legacy electronic game machine, such as a pinball machine, operating within a physical environment and used by a player. The game machinemay include a cabinetsupporting a playfieldcontaining mechanical and electronic gameplay elements, and a display assemblyconfigured to present score information, game status, or visual effects to the player. In some implementations, the machine may further include internal electronic assemblies including a processor, memory devices, input/output circuitry, and control electronics mounted on one or more internal circuit boards.

1 FIG. 110 In some implementations, a retrofit interface device (not visible in) may be installed within the game machine, for example between a processor and a main circuit board, to enable monitoring of processor bus signals, interception of memory access operations, and selective provision of substitute data while preserving predetermined processor timing and control flow. Such installation may occur within an existing integrated circuit socket or other electrical interconnection point without requiring modification of original system wiring, firmware, or mechanical structure.

1 FIG. 130 In certain implementations, the retrofit interface device may provide wireless or network communication capability, schematically represented inby wireless communication indicator, enabling operational data such as game scores, player identifiers, machine diagnostics, or configuration information to be transmitted to external computing devices, cloud services, or remote monitoring systems. This capability may allow centralized score tracking, remote diagnostics, tournament coordination across multiple machines, or enhanced player engagement features.

1 FIG. 130 In certain implementations, the retrofit interface device may provide wireless or network communication capability, schematically represented inby wireless communication indicator. Such communication capability may include, by way of non-limiting example, wireless technologies such as Wi-Fi, Bluetooth®, Zigbee, near-field communication (NFC), cellular communication protocols including 4G or 5G, or other radio-frequency communication techniques, as well as wired or networked communication interfaces including Ethernet, serial communication links, USB-based networking, or other data communication infrastructures. Through these wireless or network communication capabilities, operational data such as game scores, player identifiers, machine diagnostics, configuration parameters, usage analytics, or other machine-generated information may be transmitted to external computing devices, cloud services, centralized management systems, or remote monitoring platforms. This functionality may facilitate centralized score tracking, remote diagnostics and maintenance, tournament coordination across multiple machines, software or configuration updates, and enhanced player engagement or operator management features.

In some implementations, the retrofit interface device may further enable expanded operational functionality including persistent score storage beyond the limits of native machine memory, automated player identification capture, remote configuration of machine parameters, diagnostic monitoring of hardware components, and controlled modification of runtime memory values to influence gameplay states without altering stored program instructions.

1 FIG. The example illustrated inis provided for explanatory purposes only. The disclosed techniques may be applied to various types of legacy entertainment machines, including pinball machines, arcade video games, redemption games, and other electronic gaming systems, and may operate in a wide range of physical environments while preserving the original gameplay characteristics and operational timing of the legacy equipment.

2 FIG. 210 230 240 is a schematic side view illustrating a physical arrangement of electronic components on an existing legacy game machine control board, such as a pinball machine control board. The figure depicts a circuit boardsupporting one or more socket-mounted integrated circuits including a microprocessor chipand a memory device, such as random access memory (RAM) or another memory component. This configuration represents a typical legacy electronic architecture in which major functional components are mounted on a main circuit board and interconnected through processor bus signals.

210 210 The circuit boardmay comprise a printed circuit board supporting electrical traces, power distribution layers, and interconnection structures configured to electrically couple electronic components mounted thereon. The circuit boardmay further include additional electronic elements such as input/output controllers, voltage regulators, timing circuitry, and peripheral interface components used to control gameplay functions, scoring operations, display outputs, and system diagnostics in the electronic game machine.

220 210 230 220 230 210 230 220 The chip socketmay be mounted on the circuit boardand configured to removably receive the main microprocessor chipto provide selective communication therewith. The chip socketmay provide electrical connections between pins of the microprocessor chipand conductive traces on the circuit boardwhile allowing the microprocessor chipto be installed, replaced, or serviced without soldering. In legacy game machines, such socketsare commonly used to facilitate maintenance, upgrades, or troubleshooting of processor components.

230 230 210 The main microprocessor chipmay execute program instructions associated with gameplay control, scoring logic, input processing, and system management functions. The microprocessor chipmay communicate with memory devices and peripheral components through address, data, and control bus signals carried by conductive traces on the circuit board. These bus communications may occur in accordance with predetermined operational timing requirements dictated by the processor architecture and system design.

240 240 230 210 The memory devicemay comprise random access memory, static memory, or another memory component configured to store operational data associated with gameplay state, scoring information, configuration parameters, or temporary computational results. The memory devicemay be electrically coupled to the microprocessor chipthrough bus connections on the circuit board, enabling read and write operations during execution of program instructions. In certain legacy systems, such memory devices may include battery-backed memory to preserve data when system power is removed.

240 In some implementations, interaction between the circuitry described herein and the memory devicemay occur in a non-intrusive manner in which program instructions stored in program memory remain unmodified, and the circuitry instead observes bus activity or selectively supplements operational data without altering executable code. Such arrangements may preserve original firmware behavior while enabling auxiliary functions such as monitoring, diagnostics, data logging, or compatibility enhancement. In other implementations, however, the circuitry may be configured to influence execution associated with program memory under controlled conditions, for example by temporarily presenting substitute data values during selected memory access cycles, redirecting addressable resources, or conditionally supplying supplemental instruction data without permanently rewriting stored program code. These alternative embodiments may be selectively enabled depending on system configuration or design objectives so that both strictly non-code-altering operation and controlled execution-influencing operation may be supported without departing from the disclosed architecture.

2 FIG. 230 240 210 230 220 110 The arrangement illustrated intherefore represents a conventional legacy hardware configuration in which the microprocessor chip, memory device, and supporting circuitry are mounted directly on the circuit board. In various implementations of the present disclosure, an additional interface device may be inserted between the microprocessor chipand the chip socket, or otherwise electrically interposed within the processor bus pathway, to enable monitoring, interception, storage, or selective modification of operational data while maintaining compatibility with the original hardware architecture and operational timing of the legacy electronic game machine.

3 FIG. 110 210 320 230 220 350 210 230 210 illustrates an example physical arrangement of electronic components associated with installation of a retrofit interface device within a legacy electronic game machine, such as a pinball machine control system. The figure depicts a main circuit boardsupporting electronic components of the game machine, together with a printed circuit board (PCB) hardware interposer modulepositioned between a main microprocessor chipand an existing chip socket. A memory device, such as random access memory (RAM) or another memory component, is also shown mounted on the main circuit board. This configuration demonstrates how the hardware interposer device may be electrically interposed between the main microprocessor chipand the main circuit boardwhile preserving the original hardware architecture.

320 110 320 In some implementations, the hardware interposer modulemay include interchangeable adapter or connector configurations to accommodate different processor families, package types, or socket standards encountered in legacy electronic systems/game machines. For example, adapter structures may support dual in-line package (DIP), pin grid array (PGA), quad flat package (QFP), or other processor form factors through corresponding socket interfaces, pin-mapping arrangements, or connector translation circuitry. Such configurations may allow the interposer moduleto be deployed across multiple hardware platforms while maintaining electrical compatibility, signal integrity, and timing characteristics consistent with the original processor-to-board interface.

320 210 As used herein, the printed circuit board (PCB) hardware interposer modulemay also be referred to as a hardware interposer device, retrofit interface module, interface circuit board, electronic adapter board, intermediary circuit board, processor interface board, inline interface module, bus interposer device, retrofit electronics module, auxiliary interface board, signal interface apparatus, or interface hardware assembly. These terms may be used interchangeably to describe an electronic interface structure configured to be electrically interposed between a processor and a main circuit boardto enable monitoring, interception, emulation, storage, or selective modification of processor-related signals while preserving compatibility with legacy system timing, architecture, and operational functionality.

320 110 In some implementations, the hardware interposer modulemay support non-volatile memory (NVRAM) emulation and restoration functions to preserve operational data associated with legacy electronic systems. For example, the module may capture data written to a memory region corresponding to battery-backed or non-volatile storage and maintain a persistent copy in alternative storage circuitry. Upon system startup, reset, or power restoration, the stored data may be selectively restored or presented to the processor to replicate expected NVRAM contents. Such arrangements may facilitate continued system operation, data preservation, or maintenance support while reducing reliance on aging or failure-prone physical NVRAM components.

320 In some implementations, the hardware interposer modulemay be configured to maintain deterministic timing parity with processor bus operations while performing monitoring, pass-through communication, or selective signal intervention. Deterministic timing parity, as used herein, may refer to preserving expected signal timing relationships, propagation delays, and cycle alignment defined by the processor architecture so that insertion of the interposer module does not introduce unintended latency, timing skew, or bus-cycle disruption. Such timing-preserving operation may be achieved, for example, through matched signal routing, buffering strategies, controlled impedance design, synchronous sampling techniques, or other circuit design approaches that allow the interposer module to observe or influence signals without degrading legacy system synchronization, memory access integrity, or operational stability.

210 210 The main circuit boardmay comprise a printed circuit board including conductive traces, interconnection layers, voltage regulation components, and interface circuitry supporting operation of the electronic game machine. The board may host processing components, memory devices, input/output circuitry, and game control electronics responsible for gameplay management, scoring operations, display control, and peripheral communications. The circuit boardmay further include connectors, sockets, and expansion interfaces used for maintenance, upgrades, or diagnostic access.

320 230 220 320 230 220 320 210 The PCB hardware interposer modulemay be configured as a retrofit interface module that electrically interposes between the main microprocessor chipand the chip socket. In some implementations, the hardware interposer modulemay include corresponding connectors or pin interfaces allowing the microprocessor chipto be mounted onto the module while the module itself is inserted into the original chip socket. This stacked arrangement may allow The PCB hardware interposer moduleto observe, intercept, store, or selectively modify processor bus signals without requiring modification of the existing circuit boardor removal of original system components.

230 230 220 210 320 230 220 320 230 The main microprocessor chipmay execute program instructions associated with gameplay control, scoring logic, input handling, display management, and system diagnostics. During operation, the microprocessor chipmay communicate with memory devices, input/output controllers, and other system components through address, data, and control bus signals routed through the chip socketand circuit board. By positioning the hardware interposer modulebetween the microprocessor chipand the chip socket, the hardware interposer modulemay transparently monitor these communications while preserving predetermined timing characteristics of the main microprocessor chip.

220 230 210 220 110 320 220 The chip socketmay provide removable electrical coupling between the microprocessor chipand conductive traces on the circuit board. Such socketsare commonly present in legacy electronic game machinesto facilitate servicing or replacement of processor components. The retrofit interface hardware interposer modulemay be configured to utilize the infrastructure of the socketto enable non-invasive installation, avoiding soldering, wire modification, or alteration of original circuitry.

350 350 230 210 320 The memory devicemay comprise random access memory, battery-backed memory, or another memory component configured to store operational data such as game scores, player identifiers, configuration parameters, diagnostic information, or temporary computational data. The memory devicemay communicate with the microprocessor chipthrough processor bus connections on the circuit board. In some implementations, the hardware interposer modulemay monitor or emulate selected memory operations, store additional data locally, transmit operational data externally, or selectively modify memory values to influence gameplay behavior without modifying program instructions stored in read-only memory.

3 FIG. 320 230 220 210 The arrangement illustrated intherefore demonstrates an example non-invasive installation architecture in which the hardware interposer moduleis interposed between an existing microprocessor chipand its chip socketon the main circuit board. This configuration may enable enhanced data access, persistent storage, remote connectivity, diagnostics, or gameplay augmentation while maintaining compatibility with legacy hardware timing requirements and preserving normal operation of the electronic game machine.

4 FIG. 110 230 320 220 210 230 460 230 320 460 320 220 230 320 illustrates an example signal-flow arrangement associated with a write operation in a legacy electronic game machinein which processor-generated bus signals are communicated from a main microprocessor chipmounted to a hardware interposer modulepositioned between the chip socketon the main circuit boardand the microprocessor chip. In this example, signal pathschematically represents one or more processor-generated bus signals communicated from the main microprocessor chipthrough the interposer moduleto devices or memory installed on the interposer board. In various implementations, the bus signals represented by signal pathmay include address signals, data signals, and control signals such as read/write strobes, chip-select signals, clock signals, and other timing or qualification signals used to define a memory write cycle. The hardware interposer modulemay use such signals to identify a write operation, determine an addressed memory location, and capture the associated data value being written. The chip socketmay provide a removable electrical interface for the microprocessor chipand may facilitate insertion of the hardware interposer modulewithout permanent modification of the original circuit board or processor package

470 230 210 350 320 210 350 320 Signal pathschematically represents propagation of at least a portion of the processor-generated bus signals from the main microprocessor chiptoward circuitry on the main circuit board, including the memory deviceand/or other input/output circuitry. In a pass-through arrangement, the hardware interposer modulemay allow the bus signals associated with the write cycle to continue to the main circuit boardsuch that the memory devicereceives the write operation substantially as it would in the absence of the hardware interposer module, thereby preserving predetermined processor timing and control flow.

320 350 470 320 320 In some implementations, the hardware interposer modulemay implement a branching operation during the write cycle such that the same write transaction is both (i) delivered to the memory devicevia signal pathand (ii) copied or stored locally by the hardware interposer module. For example, upon detecting a write control signal and corresponding address/data values, the hardware interposer modulemay store the written data in an onboard memory or buffer, maintain a shadow copy of selected memory locations, or log write activity for subsequent analysis, diagnostics, score tracking, or external transmission.

320 230 In certain implementations, the branching behavior may be selective. For example, based on decoded address ranges, chip-select qualification, or other control conditions, the hardware interposer modulemay copy write operations for a subset of memory locations associated with game state or scoring while passing other write operations through without local storage. This selective branching may reduce processing overhead and ensure that write-cycle timing remains compatible with the legacy bus operation of the main microprocessor chip.

5 FIG. 110 210 320 230 220 350 210 560 570 580 320 illustrates an example physical arrangement of electronic components associated with a read-operation interception configuration in a legacy electronic game machine, such as a pinball machine control system. The figure depicts a main circuit boardsupporting electronic components of the game machine, together with a printed circuit board (PCB) hardware interposer modulepositioned between the main microprocessor chipand the existing chip socket. A memory device, such as random access memory (RAM) or another memory component, is also mounted on the main circuit board. Bus signal pathsandare schematically illustrated to represent processor bus communications, while a bus-control functionindicates a selective blocking or isolation condition implemented by the hardware interposer moduleduring certain read operations.

580 320 350 The blocking location indicated by the bus-control functionschematically represents a signal isolation or bus-control function implemented by circuitry within the hardware interposer module. During certain processor read operations, the interposer module may selectively isolate, inhibit, or override data originating from the memory deviceor other main-board components, thereby preventing that data from reaching the processor. The module may instead supply substitute data from local storage, buffered memory, or emulated memory circuitry. Such substitution may enable persistent storage, enhanced score tracking, diagnostics, remote connectivity, gameplay augmentation, or other functionality while preserving processor timing compatibility and maintaining normal system operation.

210 The main circuit boardmay comprise a multilayer printed circuit board including conductive traces, power regulation circuitry, signal routing layers, and interface components supporting gameplay control, scoring operations, input/output management, and display functions of the electronic game machine. The board may host processors, memory devices, interface controllers, and peripheral circuitry interconnected through address, data, and control buses.

320 230 220 320 230 320 320 220 The hardware interposer modulemay be configured as an interface circuit board electrically interposed between the microprocessor chipand the chip socket. The modulemay include mating connectors or pin interfaces allowing the microprocessor chipto mount onto the modulewhile the moduleitself is inserted into the original chip socket. This arrangement enables monitoring, capturing, emulating, or selectively substituting bus data while preserving the original electrical and timing characteristics expected by the legacy hardware. Such operation may allow enhancement of data management, diagnostics, connectivity, or gameplay functionality without modifying existing processor instructions or circuit board wiring.

230 220 210 560 320 230 The main microprocessor chipmay execute program instructions associated with gameplay logic, scoring control, input handling, display management, and system diagnostics. During a memory read operation, the processor may issue address, data, and control signals that propagate through the chip sockettoward memory devices or peripheral circuitry on the main circuit board. Bus signal pathschematically represents bus data provided from the hardware interposer moduletoward the microprocessor chip, for example when locally stored or emulated data is supplied by the module.

220 230 210 220 110 320 The chip socketmay provide removable electrical coupling between the microprocessor chipand conductive traces on the main circuit board. Such socketsare commonly present in legacy electronic game machinesto facilitate servicing, replacement, or upgrading of processor components. The hardware interposer modulemay utilize this socket infrastructure to achieve non-invasive installation without soldering, wiring modifications, or alteration of existing circuitry.

350 350 230 570 The memory devicemay comprise random access memory, battery-backed memory, or another storage component configured to store operational data such as game scores, player identifiers, configuration parameters, diagnostic information, or transient computational data. Under normal operation, data from the memory devicewould propagate toward the main microprocessor chipthrough the socket interface, represented schematically by bus signal path.

580 320 320 350 320 The bus-control functionschematically indicates a selective signal blocking or bus isolation condition implemented by circuitry within the hardware interposer module. During certain processor read operations, the interposer modulemay electrically decouple or inhibit data originating from the memory deviceor other main-board components, thereby preventing that data from reaching the processor. The modulemay instead supply substitute data from local storage, buffered memory, or emulated memory circuitry. Such substitution may enable persistent storage, enhanced score tracking, diagnostics, remote connectivity, gameplay augmentation, or other functionality while preserving processor timing compatibility and maintaining normal system operation.

5 FIG. 320 210 110 Accordingly, the arrangement illustrated indemonstrates an example read-operation interception architecture in which the hardware interposer moduleselectively replaces data that would otherwise originate from devices on the main circuit boardwith locally generated or stored data. This approach enables enhanced functionality in legacy electronic game machineswhile maintaining compatibility with existing hardware architecture, processor timing constraints, and original program execution behavior.

6 FIG. 210 320 230 220 210 350 210 illustrates another example physical arrangement of electronic components associated with installation of a retrofit interface module within a legacy electronic game machine, such as a pinball machine control system. In this example, a main circuit boardsupports electronic components of the game machine, including processing, memory, and interface circuitry. A printed circuit board (PCB) hardware interposer moduleis shown positioned between a main microprocessor chipand a corresponding chip socketmounted on the main circuit board. A memory device, such as random access memory (RAM) or another memory component, is also shown on the main circuit board. This configuration illustrates how the interposer module may be physically interposed between an existing processor and its socket while preserving the original hardware architecture.

320 In another implementation, the hardware interposer modulemay include a user-interface (UI) and wireless telemetry capability configured to provide remote visibility into system operation and facilitate maintenance or diagnostics. For example, the module may incorporate a wireless communication interface such as Wi-Fi, Bluetooth®, or another radio-frequency link to transmit operational data, processor bus activity summaries, performance metrics, or diagnostic information to an external computing device. A local or remote UI, which may include a web-based dashboard, mobile application interface, or service terminal display, may allow configuration of operational parameters, retrieval of stored data, firmware updates, or monitoring of system status without requiring physical access to the legacy game machine hardware.

210 210 210 The main circuit boardmay comprise a multilayer printed circuit board including conductive traces, interconnection vias, voltage regulation components, clock distribution circuitry, input/output interfaces, and control electronics supporting operation of the electronic game machine. The circuit boardmay host gameplay logic circuitry, scoring control electronics, display drivers, input interface components, and diagnostic circuitry. In legacy systems such as pinball machines, the main circuit boardmay include replaceable chip sockets and modular connectors that facilitate maintenance, servicing, or hardware upgrades.

320 220 230 210 320 The hardware interposer modulemay be configured as a retrofit interface board adapted to be inserted into an existing chip socketwhile receiving the main microprocessor chipon an upper connector surface. This stacked arrangement may permit electrical interception of processor bus signals without soldering modifications to the original main circuit board. The hardware interposer modulemay include buffering circuitry, programmable logic, memory elements, signal conditioning components, or bus-control circuitry configured to observe, emulate, store, or selectively modify processor communications while maintaining compatibility with original processor timing requirements.

230 230 350 220 210 320 230 220 The main microprocessor chipmay execute program instructions associated with gameplay management, scoring operations, input/output coordination, diagnostic routines, and other system functions. During operation, the main microprocessor chipcommunicates with memory deviceand other system components via address, data, and control signals transmitted through the chip socketand conductive traces on the main circuit board. Placement of the hardware interposer modulebetween the main microprocessor chipand chip socketmay allow monitoring or selective modification of such communications without altering the processor program instructions.

220 230 210 220 320 220 The chip socketmay provide removable electrical coupling between the main microprocessor chipand conductive traces on the main circuit board. Such socketsare commonly present in legacy electronic game machines to facilitate servicing or replacement of processor components. The hardware interposer modulemay utilize this socketinfrastructure to enable non-invasive installation while preserving the original hardware configuration and serviceability of the system.

320 210 In some implementations, the hardware interposer modulemay further include a user-interface (UI) and wireless telemetry subsystem configured to provide remote monitoring, configuration, and diagnostic access to the legacy electronic game machine. For example, the module may incorporate wireless communication circuitry such as Wi-Fi, Bluetooth®, or other radio-frequency interfaces capable of transmitting operational status information, processor bus activity summaries, performance metrics, or diagnostic data to an external computing device. A corresponding UI, which may be implemented as a web-based dashboard, mobile application, or service interface, may allow authorized users to review system conditions, adjust configuration parameters, retrieve stored operational data, or perform maintenance-related functions without requiring direct physical access to the main circuit boardor processor assembly.

350 320 230 The memory devicemay comprise random access memory, battery-backed memory, nonvolatile memory, or another storage component configured to store operational data such as game scores, player identifiers, configuration parameters, diagnostic data, or temporary computational values. In some implementations, the hardware interposer modulemay monitor memory access operations, emulate selected memory locations, store additional data locally, or selectively substitute data supplied to the main microprocessor chip, thereby enabling enhanced functionality while maintaining compatibility with legacy hardware timing and operational characteristics.

6 FIG. 320 230 220 210 The arrangement illustrated intherefore demonstrates an example retrofit architecture in which the hardware interposer moduleis physically and electrically interposed between an existing main microprocessor chipand its corresponding chip socketon the main circuit board. This configuration may enable enhanced data access, persistent storage, diagnostics, connectivity features, gameplay augmentation, or other functional enhancements while preserving the original processor control flow, timing characteristics, and overall operation of the electronic game machine.

7 FIG. 700 is a flow diagramillustrating an example operational configuration of a retrofit interface device configured to be electrically interposed between a processor and a main circuit board of an electronic game machine. The illustrated flow diagram represents operational modes of circuitry disposed on a circuit board that includes a first connector configured to be communicatively coupled to the processor and a second connector configured to be communicatively coupled to the main circuit board. The operations shown in the diagram reflect hardware-level signal handling rather than sequential software instructions and may occur concurrently, cyclically, or conditionally during processor bus activity. The configuration may be implemented in legacy electronic game machines, including pinball control systems, arcade platforms, and other processor-controlled entertainment devices.

The circuit board may be distinct from the main circuit board of the electronic game machine and may be installed at one of multiple alternative insertion points, including a processor socket, memory socket, ROM socket, or an inter-board connector, while remaining operatively interposed between the processor and memory accessed via a processor bus. Circuitry electrically connected between the first connector and the second connector may be configured to receive, pass through, monitor, decode, and selectively respond to address, data, and control signals generated by the processor. In operation, the processor may execute program instructions in accordance with a predetermined operational timing and control flow defined by the original system architecture.

710 At block, the circuitry may operate in a first mode of operation in which processor-generated signals are passed through between the processor and the main circuit board. Such signals may include address lines, data lines, control strobes, clock signals, and chip-select signals associated with processor bus communications. In this mode, the circuitry maintains compatibility with legacy timing constraints and permits normal processor access to memory and peripheral devices without alteration to the predetermined operational timing or control flow.

720 At block, the circuitry selectively provides data to the processor during a second mode of operation in response to at least a subset of processor-generated signals. In this mode, the circuitry may intercept read or write operations, determine whether a memory access falls within selected address ranges using programmable decoding logic, and supply substitute or emulated data values to the processor in place of data supplied from memory on the main circuit board. The circuitry may further monitor processor write operations, store corresponding data values in memory on the circuit board, modify stored data prior to a subsequent read operation, control which device drives a data bus during a read cycle, or emulate random access memory for a subset of memory access operations. In some implementations, a hardware-implemented programmable input/output state machine coordinated with a direct memory access controller may perform such interception and selective data substitution with deterministic timing and without software intervention, including within legacy bus timing margins.

730 At block, the processor executes program instructions in accordance with the predetermined operational timing and control flow of the electronic game machine based on data received during processor bus transactions. While the circuitry selectively provides or substitutes data in the second mode of operation, the processor may continue executing original program instructions without modification. In some implementations, a microcontroller disposed on the circuit board may manage stored game data asynchronously relative to real-time processor bus timing and may provide access to such data through a user interface external to the game machine, including via a wireless communication interface, thereby enabling enhanced data management functionality while preserving compatibility with legacy hardware architecture.

In some embodiments, the circuitry may emulate random access memory for selected address ranges by supplying substitute data values corresponding to addressed memory locations. Address decoding logic may determine when the device should provide locally stored data versus permitting memory devices on the main circuit board to respond. Bus arbitration circuitry may control which device drives the processor data bus during read operations.

In further implementations, programmable hardware logic such as a programmable input/output (PIO) state machine coordinated with a direct memory access (DMA) controller may intercept address, data, and control signals with deterministic timing characteristics. Such configurations may maintain compatibility with legacy processor bus frequencies, including approximately 1-3 MHz timing environments commonly present in older electronic game machines.

Additional embodiments may include installation flexibility allowing the circuit board to be positioned at various insertion points within an electronic game machine, including processor sockets, memory sockets, ROM sockets, or inter-board interfaces. Adapter connectors may enable compatibility across different processor families or pin configurations, facilitating retrofit installation without modification of the original hardware.

The circuitry may further include a microcontroller configured to manage stored game data asynchronously relative to processor bus timing. The microcontroller may provide external access to stored data through wired or wireless interfaces, enabling diagnostics, data logging, remote monitoring, or gameplay analytics without disrupting real-time processor operation.

7 FIG. Accordingly,illustrates an example operational architecture in which a hardware interposer device may selectively pass through processor signals or supply substitute data while preserving original processor timing and control flow. This architecture may enable enhanced functionality, persistent data management, diagnostics, and compatibility with legacy electronic game machine hardware without requiring modification of the processor program instructions or the main circuit board.

It will be appreciated that the implementations described above are cited by way of example, and that the present invention is not limited to what has been particularly shown and described hereinabove. Rather, the scope includes both combinations and sub combinations of the various features described hereinabove, as well as variations and modifications thereof which would occur to persons skilled in the art upon reading the foregoing description and which are not disclosed in the prior art.

8 FIG. 110 810 860 820 210 110 is a block diagram of electronic circuitry and signal interconnections associated with a hardware interposer module configured for installation within a legacy electronic game machine, such as a pinball machine control system. In this example, a main microprocessor chipis communicatively coupled to the interposer board processing unit, which in turn is connected to a processor socketmounted on the main circuit boardof the game machine. The block diagram discloses a representative method of routing various signals to facilitate the operational modes described herein.

830 810 210 820 830 810 810 830 210 A first bidirectional buffermay be disposed in a signal path between the main microprocessor chipand the main circuit boardvia the processor socket. The first bidirectional bufferis configured to support normal read and write cycles initiated by the main microprocessor chip, thereby permitting standard access to random access memory (RAM), read-only memory (ROM), input/output (I/O) devices, and other addressable resources on the main circuit board as required for operation of the game machine. During such normal operation, signals generated by the main microprocessor chippass through the first bidirectional bufferand are conveyed to the main circuit boardwithout modification.

860 810 860 860 850 860 210 850 860 870 860 860 The interposer board processing unitincludes a processing unit communicatively coupled to an address bus of the main microprocessor chip. The connection between the address bus and the interposer board processing unitis configured as a read-only monitoring interface, such that the interposer board processing unitmay observe the address associated with each bus operation without asserting signals onto the address bus. An address decode logicdisposed on the interposer board processing unitis configured to identify operations targeting a predetermined address space of interest on the main circuit board. When a write operation directed to the address space of interest is detected by the address decode logic, the interposer board processing unitmay capture the data associated with that operation and store, process, or relay the captured data to a memory storagealso disposed on the interposer board processing unit. This arrangement permits the interposer board processing unitto maintain a local copy of any desired address space, which may typically correspond to RAM data storage and operational data regions used by the game machine.

810 850 860 830 840 860 880 810 810 860 870 210 860 870 When a read operation is initiated by the main microprocessor chiptargeting an address within the address space of interest, as determined by the address decode logic, the interposer board processing unitmay selectively disable the first bidirectional bufferduring an appropriate portion of the bus cycle and concurrently enable a second bidirectional bufferto present data from the interposer board processing unitonto a data busfor receipt by the main microprocessor chip. This selective substitution is performed with timing consistent with the clock and read/write control signals generated by the main microprocessor chip, thereby maintaining compatibility with the predetermined operational timing and control flow of the processor. In this mode of operation, the interposer board processing unitmay utilize data stored in the memory storageto replace data that would otherwise have been read from the main circuit board. The interposer board processing unitis further configured to modify the contents of the memory storage device, thereby enabling alteration of machine operation in a controlled and selective manner.

860 Legacy gaming machine processing boards, including those found in classic pinball machines, commonly employ five-volt (5V) logic signaling levels. In some implementations, processing units, such as the interposer board processing unit, generally operate at 3.3 volts or lower logic levels. To ensure reliable data and signal transfer between these two voltage domains, level-shifting integrated circuits are employed to guarantee that minimum voltage transition levels are achieved and that no loss of data integrity or control signaling accuracy occurs, including proper discrimination between read and write operations. In addition, certain legacy machines may exhibit 5V power supply voltages with wider tolerances than those specified in this implementation, with supply voltages potentially falling as low as 4.5 volts. The level-shifting integrated circuits are selected to account for such variations in supply voltage when converting 5V signal levels.

840 860 In a representative implementation, the second bidirectional buffermay comprise an integrated circuit of type such as SN74LVCC3245ADBRG4, which is selected for its voltage-level translation capabilities and bidirectional signal handling characteristics suitable for interfacing between the 5V logic domain of the legacy main circuit board and the lower-voltage logic domain of the interposer board processing unit. Other control and timing signals, such as read/write control signals and clock signals, may be converted using level-shifting integrated circuits such as the SN74LV1T34DBVRG4, which provides unidirectional voltage translation appropriate for single-signal conditioning between disparate logic voltage levels.

Numerous specific details are set forth herein to provide a thorough understanding of the claimed subject matter. However, those skilled in the art will understand that the claimed subject matter may be practiced without these specific details. In other instances, methods apparatuses, or systems that would be known by one of ordinary skill have not been described in detail so as not to obscure claimed subject matter.

Unless specifically stated otherwise, it is appreciated that throughout this specification discussions utilizing the terms such as “processing,” “computing,” “calculating,” “determining,” and “identifying” or the like refer to actions or processes of a computing device, such as one or more computers or a similar electronic computing device or devices, that manipulate or transform data represented as physical electronic or magnetic quantities within memories, registers, or other information storage devices, transmission devices, or display devices of the computing platform.

The system or systems discussed herein are not limited to any particular hardware architecture or configuration. A computing device can include any suitable arrangement of components that provides a result conditioned on one or more inputs. Suitable computing devices include multipurpose microprocessor-based computer systems accessing stored software that programs or configures the computing system from a general-purpose computing apparatus to a specialized computing apparatus implementing one or more implementations of the present subject matter. Any suitable programming, scripting, or other type of language or combinations of languages may be used to implement the teachings contained herein in software to be used in programming or configuring a computing device.

Implementations of the methods disclosed herein may be performed in the operation of such computing devices. The order of the blocks presented in the examples above can be varied for example, blocks can be re-ordered, combined, and/or broken into sub-blocks. Certain blocks or processes can be performed in parallel.

The use of “adapted to” or “configured to” herein is meant as open and inclusive language that does not foreclose devices adapted to or configured to perform additional tasks or steps. Additionally, the use of “based on” is meant to be open and inclusive, in that a process, step, calculation, or other action “based on” one or more recited conditions or values may, in practice, be based on additional conditions or value beyond those recited. Headings, lists, and numbering included herein are for ease of explanation only and are not meant to be limiting.

It will also be understood that, although the terms “first,” “second,” etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first node could be termed a second node, and, similarly, a second node could be termed a first node, which changing the meaning of the description, so long as all occurrences of the “first node” are renamed consistently and all occurrences of the “second node” are renamed consistently. The first node and the second node are both nodes, but they are not the same node.

The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the claims. As used in the description of the implementations and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that the term “and/or” as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

As used herein, the term “if” may be construed to mean “when” or “upon” or “in response to determining” or “in accordance with a determination” or “in response to detecting,” that a stated condition precedent is true, depending on the context. Similarly, the phrase “if it is determined [that a stated condition precedent is true]” or “if [a stated condition precedent is true]” or “when [a stated condition precedent is true]” may be construed to mean “upon determining” or “in response to determining” or “in accordance with a determination” or “upon detecting” or “in response to detecting” that the stated condition precedent is true, depending on the context.

The foregoing description and summary of the invention are to be understood as being in every respect illustrative and exemplary, but not restrictive, and the scope of the invention disclosed herein is not to be determined only from the detailed description of illustrative implementations but according to the full breadth permitted by patent laws. It is to be understood that the implementations shown and described herein are only illustrative of the principles of the present invention and that various modification may be implemented by those skilled in the art without departing from the scope and spirit of the invention.