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Minor System 11 Audio notes updates/fixes,
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// copyright-holders:Barry Rodewald
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/*
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* s11c_bg.cpp - Williams D-11581 "Audio Board" (M68B09E + YM2151 + HC55516 + DAC)
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* Used by Williams System 11A (F-14), all System 11V (except Jokerz) and all System 11C pinballs
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* Used by Williams System 11A (F-14), all System 11B (except Jokerz) and all System 11C pinballs
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* Used by Midway Y-Unit Arcade Hardware (for Smash TV and High Impact Football)
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* Used by the prototype version of Funhouse pinball for the WPC Alphanumeric system
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*
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* The mixing resistors before the MC1458 differ between the D-11581, D-11581-20xx (System 11C), and D-1129x board schematics:
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* D-1129x D-11581 D-11581-20xx
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@ -83,7 +84,8 @@
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* [1] Logically there should be a capacitor to ground at c1 of value 1800uf,
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* but this was omitted on the D-11297 board, possibly in error, and this
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* omission carried over to future sound boards including all versions of the D-11581.
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* The WPC-AN sound board, A-12738-50xxx, fixed this by completely redesigning the filters for both the ym2151 and cvsd.
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* The WPC-AN sound board, A-12738-50xxx, fixed this by completely redesigning the filters
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* for both the ym2151 and cvsd.
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*
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* This circuit would be a 4th order (cascaded 2nd order) op-amp multifeedback lowpass filter,
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* but because of the capacitor omitted, it is actually a first order-with-gain lowpass,
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@ -113,11 +115,11 @@
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* W4 : if present, the VCC/+5v rail is shorted to the +12v rail. (This is used in the case where the board is only run on +5v and -12v instead of +5v, +12v, and -12v)
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* W5 - exclusive w/W6, W7 : YM2151 reset comes from Board Reset
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* W6 -'exclusive'w/W5, W7 : YM2151 reset comes from PIA CB2/J4 P12 (internal or external)
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* Williams "BG Sound Board" C-11029/C-11030 5766-10929-00
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* * used on Williams System 11 'High Speed' and 'Grand Lizard' only
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* * used on Williams System 11 'High Speed' and 'Grand Lizard' only (as well as the "Wreck'n Ball" prototype, see https://www.ipdb.org/machine.cgi?id=6167 )
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* * has DAC only
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* * no EPROM banking hardware, 1 28-pin ROM socket (2764/27128/27256 only)
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* * PIA CA1 and CA2 are labeled 'HAND1' and 'HAND2' on schematics and are tied high/unused.
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@ -15,11 +15,11 @@
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transfers to 0000 (where no valid code exists).
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- Black Knight 2000 LG-1 set reports U26 ROM FAILURE. Bad/hacked dump or original bug?
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- Jokerz has an entirely different "Pin Sound '88" stereo audio board (D-12338-567) which has to be emulated
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- Taxi and Police Force both have issues with the display showing garbage overlaid by the alphanumerics.
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- Taxi and Police Force both have issues with the display showing garbage overlaid by the alphanumerics.
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Known keys necessary to get games to start (so the proper number of balls are detected):
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(Hold these keys and press "1" after inserting 1 or more credits.)
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Almost universally, these will be listed in the switch matrix as "Ball Trough Right" "Ball Trough Center" and "Ball Shooter"
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Almost universally, these will be listed in the switch matrix as "Ball Trough Right" "Ball Trough Center" and "Ball Shooter"
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- Bad Cats: "H" "Enter"
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- Banzai Run: "S" "D" "F" (won't start due to calibration? needs more investigation, try hitting E and / and lots of keys until calibration finishes); - starts music
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- Big Guns: "D" "F" "U"
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