Indianapolis 500

Coverage: partial. Every address is enumerated and named, and construction, polarity, mechanism and variant facts are validated from the factory manuals, pinned PinMAME and the retained known-working table, and no conflict is open. It stays partial on spatial placement alone: the playfield general-illumination sockets are known only from one community table's light collections, the race track's G.I. reflector bulbs are neither counted nor placed, and the factory switch drawing puts the Ten Point (54) and Right Ramp Enter (75) callouts just over the check's 0.07 limit from the table objects, so those two placements stay observed.

Identity and drivers

• Midway Manufacturing Company under the Bally name, model 50026, released June 1995 (IPDB 2853, OPDB Gr8l3-MDWr0).
• WPC-Security (WPC-S) hardware with a DCS sound board and a 128x32 DMD.
• PinMAME drivers: i500_11r (1.1R, parent), i500_11b (1.1 Belgian) and i500_10r (1.0R). All three are declared in src/wpc/sims/wpc/prelim/i500.c with the wpc_mSecurityS machine driver, share one i500GameData and the same six sound ROMs, and are the same physical machine.

Evidence used

• Operators Handbook 16-10140, July 1995 (16 pages, Internet Archive arcademanual_Indianapolis_500_OPS): lamp, switch and solenoid tables with wiring and the location drawings. Transcribed with native-resolution crops under evidence/excerpts/bally.indianapolis-500.1995/.
• Operations manual (152 pages, IPDB indy500manualfull.pdf, image-only): the board and mechanism assembly pages that settle construction (A-19823, A-20047, A-19978, A-20038, A-20169, A-18159), the turbo multiball rules, the flasher wiring drawing and the power driver board connector lists.
• Known-working table Indianapolis_500_VPX_1.1_RTM.vpx (JPSalas VP9, Dozer VPX, Flupper ramps,
  2017. and its embedded script: runtime bindings and all geometry. Its two 4K MOD derivatives are the same geometry lineage.
• VPW 1.36 script (TastyWasps, 2023) from the pinned vpxtable_scripts corpus: same bindings, plus a separately driven upper right flipper.
• Pinned PinMAME 8371478a: address routing, inverted-switch mask and the turbo model.

Controller facts a recreation needs

• Switches use WPC column/row numbering 11-88, coin door 1-8, Fliptronic 111-118.
• Opto switches, all already normalized in public state (1 = beam broken / ball present): trough 41-45, lightup targets 56-58, upper popper 61, turbo popper 62, turbo ball sense 63 and turbo index
  66. PinMAME's mask {..,0x1f,0xe0,0x27,..} covers exactly these twelve. Do not invert them again.
• Switch 66 is an opto even though both printed switch matrices leave its cell unshaded: its part, A-20047, is the Turbo Opto PCB Assembly ("Opto Integrated 10mA").
• Fliptronic buttons 112/114/116 are cabinet optos; PinMAME's WPC_FLIPPERS read complements the whole column, so they too arrive normalized (1 = pressed). 111/113/115 are end-of-stroke leaf switches. 117/118 (upper left) are not used.
• Switch 24 is the always-closed link; PinMAME closes it at reset. The retained table writes it open in Table1_Init, a defect in that table.
• Solenoids 1-28 are the printed drivers. 29-32 are WPC state channels (31 = Game-On, because no fast-flip address is configured; 32 always zero). 37-44 are dead on this generation. 49/50 are simulator/reserved.
• Flippers: lower right 45 (power) / 46 (power or hold), lower left 47/48, upper right 33 (power) / 34 (power or hold). The printed flipper circuits 29-32 are the public 45-48.
• The Fliptronic upper-left circuits drive the pit-ramp diverter: 35 is its power winding, 36 its hold winding (raw bits, because the game declares no upper-left flipper).
• Solenoid 17 (Turbo Motor) and 18 (Race Track Motor) are printed in the Flasher category but drive motors; 17 is pulsed, and the turbo's speed follows the pulse spacing.
• G.I. strings: public 0 Upper Left Playfield, 1 Upper Right Playfield, 2 Lower Playfield (these three light the playfield; 0 and 2 also feed backbox bulbs), 3 Backbox-Coindoor and 4 Backbox Title (backbox only). The race track's two reflector fixtures are wired in string 02's colours (see below).
• Lamps 71-84 are red LEDs inside the three lightup targets, not bulbs. 67, 68 and 85 are unused; 86-88 light the Launch, Buy-In and Start buttons.

Mechanisms

Trough and launch

Four balls sit on optos 42 (right, at the eject) to 45 (left); 41 (Top Trough) is a fifth opto on the same trough. Solenoid 13 serves a ball into the shooter lane (25). Solenoid 1, a kicker at the foot of the lane, launches it, automatically or when the player presses the Launch button (11). There is no manual plunger.

Turbo

The signature toy at the upper left. A ball entering the turbo popper (opto 62) is raised by solenoid 5 up the turbo feed ramp into the turbo, a horizontal impeller in a housing turned by a 12 VDC gearmotor on solenoid 17. Turning slowly it stores balls in its impeller; spun up it throws them out onto the turbo exhaust ramp. The manual's rules lock two balls to start a 3-ball multiball, award the Super Jackpot for re-locking the third, and serve an extra ball when every ball in play is locked (four balls at most); the manual gives no physical capacity. Turbo Ball Sense (63) is an LED/phototransistor pair through the housing wall and Turbo Index (66) is an opto board under the impeller. PinMAME models the speed from the spacing of solenoid-17 pulses (stopped after roughly a second without a pulse, fast when pulses come back to back) and closes 66 for three of every sixteen steps of a 64-step revolution. The retained table's own turbo model advances four quadrants and opens 66 once per quadrant, holding it closed for the rest; recreations need an index edge per quadrant, and the exact duty cycle is not established by any source retained here.

Race track

An upright arched track at the rear right of the playfield. Solenoid 18 runs its gear motor, which carries a small car and driver around the arch. No switch reports its position.

A reflector fixture sits at each top corner of the arch, each drawn with two reflector cones. The factory drawing labels every lead ORG and ORG/WHT, read as the Orange return and White-Orange 6.8 VAC of G.I. string 02 (the only string printing #555 playfield bulbs), so they are general illumination, dimmed with the string and not strobed; the drawing prints no bulb count. The 2017 table lights that corner from its string-2 collection and adds a strobe effect (IU1-IU5 and car shadows) while the car spins; that is a table effect, not a second circuit.

Pit ramp diverter

On the left side beside the three-bank targets. A plunger coil (35 power, 36 hold) turns a blade with a large car and driver on it to divert the ball; a master spring returns it. No switch senses its position.

Poppers and kickers

• Upper popper at the rear (opto 61, solenoid 2) lifts the ball onto the rear wire ramp.
• Upper eject saucer at the top centre (switch 64, solenoid 3).
• Lower kicker at right centre (switch 65, solenoid 4, a hammer-style kicker arm).

Targets, bumpers and slingshots

• Three lightup targets (56 left, 57 center, 58 right), each an illuminated target whose board carries the target opto and four red LEDs (lamps 71-74, 75-78, 81-84). "Upper" and "lower" LEDs differ in height on the upright board, not in playfield position.
• Three-bank orange targets 28/31/32 on the left, stationary targets 34, 46, 47, 48 and 55.
• Jets: Left 72 / solenoid 8, Right 73 / 9, Center 74 / 10 (the center jet is the lower one), each with a flasher in its wafer (23, 24, 25).
• Slingshots 26/11 and 27/12; switch 54 (Ten Point) is a rubber scoring switch at the right.

Flippers

Three blue FL-11629 flippers: lower left, lower right and an upper right flipper at mid-right below the right ramp, each with its own cabinet opto and end-of-stroke switch. The 2017 table moves the upper flipper with the lower right callback; the 2023 VPW script drives it from its own address 34.

Manual discrepancies worth knowing

• The lamp-locations list swaps the names of lamps 18 and 27 against the lamp matrix. The matrix is right: 18 (Turbo Wrench) sits by the turbo and 27 (Left Ramp Wrench) by the left ramp wrench target.
• Switch 63's LED/phototransistor is printed A-14231/A-14232 in the handbook and turbo assembly but A-16908/A-16909 on the 10-opto board page; both are optos.
• The flasher wiring drawing prints different wire colours for solenoids 14-16 than the solenoid table.
• Solenoid 12's assembly is printed A-9362-R-3 in one list and B-9362-R-3 in two others (recorded as B-9362-R-3).
• The power driver board connector lists (printed 3-25/3-26) label J120 "to playfield" and J121 "to insert", the reverse of the handbook G.I. table's columns, and put the lamp rows on J135 and columns on J138 while marking the matrix's J133 and J137 "Not Used". The game-specific tables are recorded.

What would complete the record

• A socket-level survey of the playfield general illumination on a real machine, or a factory drawing assigning each G.I. socket to strings 1-3.
• The race-track reflector bulb count and positions (a photo of a real machine).
• A second geometry source for the Ten Point (54) and Right Ramp Enter (75) switches.