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Minor System 11 Audio notes updates/fixes,

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Lord-Nightmare 2020-07-06 13:27:30 -04:00
parent 413792c417
commit afcf3a059c
2 changed files with 8 additions and 6 deletions
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10
src/mame/audio/s11c_bg.cpp
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@ -2,8 +2,9 @@
// copyright-holders:Barry Rodewald
/*
* s11c_bg.cpp - Williams D-11581 "Audio Board" (M68B09E + YM2151 + HC55516 + DAC)
* Used by Williams System 11A (F-14), all System 11V (except Jokerz) and all System 11C pinballs
* Used by Williams System 11A (F-14), all System 11B (except Jokerz) and all System 11C pinballs
* Used by Midway Y-Unit Arcade Hardware (for Smash TV and High Impact Football)
* Used by the prototype version of Funhouse pinball for the WPC Alphanumeric system
*
* The mixing resistors before the MC1458 differ between the D-11581, D-11581-20xx (System 11C), and D-1129x board schematics:
* D-1129x D-11581 D-11581-20xx
@ -83,7 +84,8 @@
* [1] Logically there should be a capacitor to ground at c1 of value 1800uf,
* but this was omitted on the D-11297 board, possibly in error, and this
* omission carried over to future sound boards including all versions of the D-11581.
* The WPC-AN sound board, A-12738-50xxx, fixed this by completely redesigning the filters for both the ym2151 and cvsd.
* The WPC-AN sound board, A-12738-50xxx, fixed this by completely redesigning the filters
* for both the ym2151 and cvsd.
*
* This circuit would be a 4th order (cascaded 2nd order) op-amp multifeedback lowpass filter,
* but because of the capacitor omitted, it is actually a first order-with-gain lowpass,
@ -113,11 +115,11 @@
* 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)
* W5 - exclusive w/W6, W7 : YM2151 reset comes from Board Reset
* W6 -'exclusive'w/W5, W7 : YM2151 reset comes from PIA CB2/J4 P12 (internal or external)
* Williams "BG Sound Board" C-11029/C-11030 5766-10929-00
* * used on Williams System 11 'High Speed' and 'Grand Lizard' only
* * 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 )
* * has DAC only
* * no EPROM banking hardware, 1 28-pin ROM socket (2764/27128/27256 only)
* * PIA CA1 and CA2 are labeled 'HAND1' and 'HAND2' on schematics and are tied high/unused.

4
src/mame/drivers/s11b.cpp
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@ -15,11 +15,11 @@
transfers to 0000 (where no valid code exists).
- Black Knight 2000 LG-1 set reports U26 ROM FAILURE. Bad/hacked dump or original bug?
- Jokerz has an entirely different "Pin Sound '88" stereo audio board (D-12338-567) which has to be emulated
- Taxi and Police Force both have issues with the display showing garbage overlaid by the alphanumerics.
- Taxi and Police Force both have issues with the display showing garbage overlaid by the alphanumerics.
Known keys necessary to get games to start (so the proper number of balls are detected):
(Hold these keys and press "1" after inserting 1 or more credits.)
Almost universally, these will be listed in the switch matrix as "Ball Trough Right" "Ball Trough Center" and "Ball Shooter"
Almost universally, these will be listed in the switch matrix as "Ball Trough Right" "Ball Trough Center" and "Ball Shooter"
- Bad Cats: "H" "Enter"
- 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
- Big Guns: "D" "F" "U"