Watching the Slam Tilt Twitch stream (hey Gizmonic) on Mousin Around, I dug into the buggy sound ROM.
First of. When comparing sound between games, be sure to compare sound ROM revision(s) AND game ROM revision. One thing is the sound content. Another is its usage.
Mousin is a mess. Complete mess when it comes to release information on those sound ROMs.
It is true that one set of sound ROMs has flaws. But I cannot make out if it is L-1 or L-2 that is bad. One would think it is L-1, which was fixed. But it seems like L-2 was a change for the worse.
For this rundown, L-1 is defined to be the first relese and the one working.
The bad sound ROM will mess up at Cheezy bonus collect, Jackpot lit and Jackpot collect (with L-4 game ROM). Possibly more.
ROM files identified by the SHA1 checksum.
Known Sound ROMs.
Same as L-1
And this is the messy way to locate these files.
PinMAME pack: mous_u4.l2 **
Chip in reference game: U4 L-1
PinMAME pack: mous_u19.l2 **
Chip in reference game: U19 L-1
PinMAME pack: mous_u20.l2 * **
WMS L-4 pack: mous_u20.l2 * **
WMS L-4 text: U20 L-1 *
Chip in reference game: U21 L-1
PinMAME pack: mous_u22.l1
WMS L-4 pack: mous_u22.l1
WMS L-4 text: U22 L-1
Chip in reference game: U22 L-1
PinMAME pack: mous_u4.lx **
WMS L-4 pack: mous_u4.l2
WMS L-4 text: U4 L-2
PinMAME pack: mous_u19.lx **
WMS L-4 pack: mous_u19.l2
WMS L-4 text: U19 L-1 **
(*) indicating wrong IC location.
(**) indicating wrong revision.
The L-4 patch d87f modified software does not change any of the exsisting sound usage. But sound is added like this...
If Cheese or Streak runmode is selected and CHEESE is spelled out, hitting the center targets will once in a while cue the "Head for the hole" call out or the mouse laughter. To guide and, most importantly, to taunt the player.