No Good Gofers

Evidence and scope

This record describes the one physical Williams No Good Gofers playfield shared by ngg_13, ngg_12, ngg_10, and ngg_p06. The retained known-working VPX script binds cGameName = "ngg_13"; it is the runtime and recreation ground truth when it disagrees with lower-priority emulator scaffolding. The Williams operations manual is the physical-construction, wiring, part-number, quantity, and polarity authority. Pinned PinMAME source supplies WPC-95 public address topology. The retained VPX table supplies geometry only.

The manual SHA-256 is 736657e3a0d9c41faa5f6941e3d736ebfcbd66d2649af9dd9798d251df9cb58d. The retained table and embedded script are respectively 9f5b44285e3a10155fb0bf33a84626df45cc305f193d15963e39228355b91e59 and fbb6914941bd542f38e1ae9c15a6147b552cd33a22f586c85c3139da08aee766. The full vpxtool extraction is pinned by a 927-file, 127,738,302-byte canonical manifest (caf93fabeb7b697f65f3314425286a1f8fa96a37811b51f1abc357eb176ead66).

WPC-95 controller contract

No Good Gofers is GEN_WPC95, with the standard 8x8 switch and lamp matrices, five GI strings, Fliptronic, the WPC-95 LPDC mirror behavior, and eight custom outputs. Its four ROM entries all describe the same physical machine. The manual's printed lower-right flipper circuits 29/30 appear at public outputs 45/46 and lower-left 31/32 at 47/48. Upper-right 33/34 already equal their public addresses. Printed upper-left power 35 is deliberately repurposed for the Ball Launch (slam) Ramp; printed hold 36 is unfitted. There is no physical upper-left flipper: F7/F8 are explicitly NOT USED.

All 64 matrix cells are enumerated, including the four manual NOT USED positions (11, 43, 87, 88). Switch 24 is a real printed ALWAYS CLOSED controller input, so a recreation must establish it active rather than treat it as an ordinary hit switch. The fifteen matrix optos are exactly 31-38, 41/42, 44-46, and 63/64. That exactly matches nggGameData's inversion mask: column 3 0xff for 31-38, column 4 0x3b for 41/42/44-46, and column 6 0x0c for 63/64. Fliptronic's public input state is already normalized by the WPC-95 core; button optos F2/F4/F6 must not be re-inverted.

Ball handling and headline mechanisms

• The six-ball trough has eject opto 31 plus ball positions 32-37. The retained bsTrough helper uses positions 32-37 and solenoid 9 (Trough Eject) pulses 31 before firing the BallRelease kicker. These are real individual physical optos even though the VPX representation only has one kicker anchor.
• Auto Fire (1) serves the shooter groove (18); the Kickback (2) returns from the left outlane. The Clubhouse Kicker/Putt Out (3) and Underground Pass (24) share the Putt Out route (44), with hole-in-one (68) and Behind Left Gofer (67) feeding that progression.
• Bud at left and Buzz at right are coupled gofer/ramp assemblies. Their high-power Up coils are 4/5, their low-power Down coils 15/16, and ramp-down coils 27/28 only act after their gofer is down. Respect the state ordering: the retained script and PinMAME both clear the down sensors before lifting and set them when lowering.
• The Jet Popper (6, switch 38), Sand Trap/Left Eject (7, switch 78), and Upper Right Eject (8, switches 45/46) are captured-ball kickers. The script has a separate right-popper jam transition rather than treating it as an additional generic target.
• The Ball Launch Ramp is a transient slam-ramp diverter driven through the repurposed upper-left Fliptronic power circuit 35. The script drops its collision surfaces and returns them after a timer; do not model it as a fourth flipper.
• The wheel is a reversible 14-7955-1 motor controlled through A-16120: 37 is counter-clockwise and 38 clockwise. A-22026 is one two-channel Motor 2-Opto Board for inner/outer wheel switches 63/64. The golf cart and its path switches 71/72/74 are separate physical/recreation behavior, not aliases for motor state.
• The two lower flippers and one upper-right flipper use the printed power/hold pairs. The physical cabinet opto boards share lower/upper channels by side, but only F6's right-hand upper channel is fitted; F8 is only a generic template channel and is not a machine device.

The ordinary but author-relevant scoring hardware remains explicit: left/right slings (10/11, 51/52), three jet bumpers (12-14, 53-55), three skill targets (56-58), two spinners (61/62), two cart paths (71/72), K-I-C-K Advance plus the four K-I-C-K letters (81-85), Advance Trap (77), and captive ball (86).

Lamps, flashers, and GI

The printed lamp matrix has all 64 fitted addresses. Lamp quantities are physical, not effect counts: 13, 28, and 68 each have two lamps; 55 and 71 each have a #44 and a #555 assembly; the other positions have one. Lamp 88 is the illuminated cabinet start button and therefore deliberately has no playfield coordinate. The retained script's UpdateLamps maps each matrix address to its named lamp object; overlay lights are presentation effects and are not additional physical bulbs.

Main flashers are 17-21 and 25/26. Notice that printed controller-bank labels do not define device kind: 24 (Underground Pass) is in the manual's “Flasher” driver bank but is a coil, while 25/26 are in “Gen. Purpose” and are physical flashers. Drivers 22/23 are truly unfitted, not missing evidence.

GI is five physical circuits. Manual wiring settles their destinations:

• GI 0: left-side playfield string (WHT-BRN);
• GI 1: right-side playfield string (WHT-ORG);
• GI 2: Gofer Spotlight, split between playfield and insert panel (WHT-YEL);
• GI 3: insert-panel-only Illumination String 4 (WHT-GRN), always on;
• GI 4: insert panel plus coin-door Illumination String 5 (WHT-VIO), always on.

The manual's solenoid table transposes J105/J106 designators for the first three strings. Its wire colors and the complete interboard wiring list settle the physical destinations; do not copy the transposed connector names. The VPX script runs UseGI = 0, and its GI collections are visual proxies, so they are intentionally not used to assert a physical bulb count or invented GI coordinates.

Auxiliary eight-driver public mapping

The physical A-21773 auxiliary board's J4 drives manual solenoids 42-49: upper-right flashers 1/2/3, the two two-bulb upper-playfield flashers, then upper-left 3/2/1. The retained known-working script binds them sequentially to public callbacks 51-58 (and explicitly uses 54/55 for the upper-playfield pair). nggGameData declares eight custom outputs, also giving 51-58.

Pinned wpc.c separately assigns No Good Gofers PWM flasher types at 42 + 14 through 49 + 14, or public 56-63. That block only calls core_set_pwm_output_type; it neither maps nor drives public state, and it extends beyond this driver's declared 58-output span. The actual public mapping is independently fixed at 51-58 by hw.custSol = 8, CORE_CUSTSOLNO(1) = 51, and ngg_getSol indexing WPC_EXTBOARD2 from that boundary. The definition therefore preserves manual 42-49 as aliases and uses public 51-58. The 56-63 type table is retained as a pinned PinMAME metadata defect, not promoted to a false second address map or unresolved machine conflict.

Spatial handling and promotion state

The only coordinate system is the retained VPX table: bounds (0,0)-(964,2162), normalized as x=0 left/x=1 right and y=0 rear/y=1 apron. Direct named script objects provide coordinates for all matrix lamps except the cabinet start lamp, the directly handled switches, flippers, named kickers, named gofers, and directly bound flashers. A manual callout, a broad mechanism object, a hidden trough helper, or a VPX visual overlay is not enough to manufacture a point for an individual physical component.

The definition is consequently intentionally partial with missing = [spatial_placement]. Remaining spatial gaps include individual trough positions, ramp-down sensors, unrepresented gofer hits, both wheel optos, several coils, motor directions, and GI bulb positions. Lamps 13, 28, and 68 and flashers 20 and 25 each have two printed physical bulbs but only one directly bound retained-table emitter; those five placement sets are explicitly observed and incomplete. This is fail-closed: it is a strong physical/electrical definition, but is not author-ready.

Sources

• manual.williams.no-good-gofers.1997: visual manual transcriptions under evidence/excerpts/williams.no-good-gofers.1997/.
• vpx-table.ngg-bodydump / vpx-script.ngg-bodydump: retained known-working table, runtime binding and directly named geometry.
• pinmame.core.4ec52ff0ac13 and controller-profile.pinmame-wpc-95: WPC-95 topology, inversion, Fliptronic, LPDC, custom-output and display behavior.