Big Guns

Partial

Williams1987SYSTEM-11williams.big-guns.1987

OPDB IPDB williams/big-guns-1987.mdwilliams/big-guns-1987.json

Wire it up

what an authoring tool needs first
Bind this ROM
bguns_l8

5 ROM sets resolve to this machine. Clones share the definition unless a hardware difference is listed.

Controller platform
pinmame.system-11

PinMAME already reports logical active state. Do not invert again in the table — normally-closed is a physical fact recorded per switch, not a runtime transform.

Displays

No display inventory recorded yet.

Address space

Coverage

Partial

Real evidence exists, but authoring requirements are still missing or in conflict. Verify before shipping a table.

Completion19%

Progress is derived from the fixed author-readiness requirements. It helps rank unfinished work, but only a 100% author-ready definition passes the publication gate.

Catalog Identity
validated
Address Enumeration
unknown
Semantic Naming
unknown
Physical Wiring
unknown
Mechanisms
unknown
Variant Coverage
candidate
Recreation Knowledge
unknown
Still missing · 13
Driver MappingInput EnumerationInput SemanticsOutput EnumerationOutput SemanticsDisplay InventoryMechanism InventoryMechanism BehaviorPolarityVariant DifferencesRecreation NotesProvenanceSpatial Placement

Recreation notes

Working knowledge that has no schema field yet — edition differences, tuning values, pitfalls.

Coverage: partial - machine identity plus candidate-only I/O attachments. Playfield devices, wiring, mechanisms, and behavior are evidenced only as unverified candidates.

This record was promoted from the generated catalog stub stub.pinmame.bguns_l8 by the catalog-wide identity pass of 2026-08-29. The promotion resolves machine identity and carries the catalog's residual driver grouping over unchanged, the platform and device attachments below were added by the 2026-08-29/30 candidate passes and assert nothing beyond candidate provenance. Every requirement in the definition's coverage.missing is genuinely outstanding.

Identity

  • PinMAME catalog: root driver bguns_l8, description "Big Guns (L-8)", manufacturer "Williams", catalog year "1987".
  • OPDB record G4d8k-MJ5Z8 (IPDB 250) names this machine "Big Guns" (Williams, manufacture date 1987-10-01); the resolved identity rests on the agreement of the PinMAME catalog and this reviewed mapping.
  • The definition's driver list is exactly the clone tree PinMAME declares under bguns_l8; whether every listed driver really runs on this physical machine is unverified.

Drivers this record holds

  • bguns_l7 (1987, Williams, clone of bguns_l8).
  • bguns_l8 (1987, Williams).
  • bguns_la (1987, Williams, clone of bguns_l8).
  • bguns_lac (2019, Williams, clone of bguns_l8).
  • bguns_p1 (1987, Williams, clone of bguns_l8).

PinMAME source contract (candidate)

  • The pinned PinMAME source declares bguns_l8 at src/wpc/s11games.c:448 with machine module s11_mS11AS; the definition declares controller platform pinmame.system-11 from it.

What a curator must establish next

Full input, output, and display enumeration with semantic names; physical wiring and polarity; mechanism inventory and behavior; variant differences across the clone tree; recreation knowledge from a manual, schematic, or known-working table; runtime provenance; and a normalized spatial placement for every physical device. No manual, schematic, or runtime-harness evidence is retained for this machine yet; the candidate sections above are the only retained I/O evidence so far.

ROM sets

Every driver that resolves to this physical machine.

ROM set Description Year Parent Hardware
bguns_lacBig Guns (L-AC Competition MOD) 2019bguns_l8—
bguns_p1Big Guns (P-1 Prototype) 1987bguns_l8—
bguns_laBig Guns (L-A) 1987bguns_l8—
bguns_l8Big Guns (L-8) 1987——
bguns_l7Big Guns (L-7) 1987bguns_l8—

Parent set: bguns_l8 — clones share this definition unless a hardware difference is noted.

Pinball memory maps

External source LGPL-3.0-only2 maps

RAM layouts published by an independent project and mirrored here at a pinned commit. They are not part of this machine’s definition: nothing below was used as evidence for the definition, and none of it counts towards coverage. Check claims against the upstream project.

Upstream
tomlogic/pinball-memory-maps
Commit
d8693b9

This program makes use of content from the Pinball Memory Maps project.

bguns_l8.map.json

williams-system11-48Kv4format 0.8

maps/williams/system11/bguns_l8.map.json

Applies to ROMs
bguns_l8
Sections
auditschecksum8game_statehigh_scores
Map JSONMap sourcePlatform JSONPlatform source

williams-system11-48K defines the RAM layout this map’s offsets are read against — the map is not interpretable without it.

bguns_la.map.json

williams-system11-48Kv4format 0.8

maps/williams/system11/bguns_la.map.json

Applies to ROMs
bguns_la
Sections
auditschecksum8game_statehigh_scores
Map JSONMap sourcePlatform JSONPlatform source

williams-system11-48K defines the RAM layout this map’s offsets are read against — the map is not interpretable without it.

Evidence

Every claim above traces to one of these. When they disagree: a known-working VPX script wins on controller addresses and causality, the manual wins on wiring and construction, pinned PinMAME wins on emulator routing and display layout.

  • PinMAME catalog

    BSD-3-Clause

    pinmame.catalog.8371478a7640

    PinmameGetGames

    8371478a7640
    by
    PinMAME contributors
    rev
    8371478a7640

  • PinMAME source

    BSD-3-Clause

    pinmame.core.8371478a7640

    src/wpc/s11games.c:448 (machine module s11_mS11AS)

    src/wpc/s11games.c
    by
    PinMAME contributors
    rev
    8371478a7640

Something wrong or missing?

This definition still has 13 unmet requirements, listed under Coverage above. Fixes belong in the definition itself — editing on GitHub forks it for you and opens the pull request.

Cite a source for anything you change — a manual page, a line in a working VPX script, PinMAME source, or a reading from the machine's own service menu. Claims without provenance cannot be validated.

Edit the definition Edit the note Report a problem
Before you startCONTRIBUTING.mdschemas/machine.schema.jsondocs/MACHINE_DEFINITIONS_PLAN.md How to read a definition

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