0.97u4

MAMETesters Bugs Fixed
getstarb093u3gra [Mamesick]
wintbob079u1gre [Mamesick]
htchctch096u1gre [Mamesick]
blswhstl36b16gre [Mamesick]
offtwall097u3red [David Haywood]
ppc096u1red [Ville Linde]
akiss077u3 [Aaron Giles]
gfxviewer097u1ora [Aaron Giles]
gtmr097u3yel [Aaron Giles]
mkla1097u1ora [Aaron Giles]
okscreen097u2yel [Aaron Giles]
topspeed097gre [Aaron Giles]
yamato097u1gra [ShimaPong]

Source Changes
Fixed v60 SBR handling to ignore the low 12 bits. This allows the hack in tp2m32 to be removed. [Aaron Giles]

Adjusted volume balance in ddragon3, ctribe, mugsmash. [Mamesick]

Added correct sound ROMs to World Class Bowling Tournament and Deluxe. [Brian Troha]

Replaced old Outrun bootleg with a new dump that passes the ROM test and has proper ROM names. [David Haywood]

More PowerPC improvements: [Nathan Woods]
- Fixed exception handling; previously the MSR register was stored in EDX, and EDX is not preserved across the call to ppc_set_msr()
- Implemented recompile_fcmpo()
- Fixed certain rules in rules.mak (some said drc_ops.h instead of drc_ops.c)
- Commented the MSR_* values
- Moved BAT registers into their own structure
- Added DSI and ISI exceptions (non-DRC core only for now)
- Moved READ*/WRITE* functions into ppc_mem.c
- Changed memory handling so that reading and writing are done through function pointers that can be changed at runtime (which would be useful if, say a MMU was implemented in the future )

PSX/Namco System 12 improvements: [smf]
- Added Tenkomori Shooting
- Updated board notes from Guru.
- Removed rom patches from the namco system 12 driver
- Renamed sound program roms.
- Added support for dma´ing incomplete blocks from MDEC
- Added sprites x & y flipping
- Caches the decoded tpage fields.
- mask setting & dma setup updates status fields correctly.
- reverse flag only has an effect on original GPU´s.

Yet another fix to the PowerPC counters, reimplementing them from scratch. [Ville Linde]

Some improvements to the Model 2 driver: [Ville Linde]
- Added the second SHARC
- Fixed all the problems caused by the previous update

Fixed incorrect test in sauro.c video system. [Pierpaolo Prazzoli]

Improved Lethal Enforces sprites, allowing 2 sprite chips to be created. [David Haywood]

Rewrote the System 32 mixer to support accurate implementation of the alpha blending modes. Sprite shadows and several other effects are still not yet implemented. And it´s much slower than before. [Aaron Giles]

New games added or promoted from NOT_WORKING status
Slipstream [Aaron Giles]
Tenkomori Shooting [smf]

New clones added
Gaiapolis (Europe ver EAF) [Brian Troha]
Raiden DX (Metrotainment license) [Corrado Tomaselli]
Mechanized Attack (US) [Highwayman]

New games marked as GAME_NOT_WORKING
Meyco game [Pierpaolo Prazzoli]

- Removed some drivers changes. (They're included now in official MAME)
- Removed VSNES.C driver changes. (They were incorrect)