0.86 2004/08/23 [#198 - David Haywood]
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While there are no new working games in this release it remains interesting from a technical and development point of view mainly due to the new PPC core as well as the Hyperstone and 37710 fixes. It should also be a fairly stable release after the many input changes which have taken place recently.


New Clones Supported or Promoted from GAME_NOT_WORKING Status
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Field Goal (different) [Andy Welburn]

New Non-Working Games / Clones Supported
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Cool Mini [David Haywood] (1)
Cool Riders [David Haywood] (2)
Pit Boss (3)
Tatakae! Big Fighter [Tomasz Slanina] (4)

Notes:
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(1): Hyperstone based game, incomplete set.
(2): Skeleton driver, to be continued at a later date.
(3): Added to merit driver, not investigated the issues yet.
(4): Serious protection issues.


Source changes:
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- Various Konami PPC based games added: gticlub, gradius4, sscope, sscope2, racingj, racingj2, thrilld, midnrun, windheat. These are to demonstrate the PPC core in action, they contain only very preliminary emulation and do nothing more than display the initial test screens [Ville Linde].
- M37710, NamcoSS22 and C352 improvements [R. Belmont]:
  M37710 changes (m37710.diff):
  * Data bus is actually 16 bit, not 8;
  * Fixed saving of status register on interrupts;
  * Fixed errors in PHB, PHT, PLT, and ANDB opcodes;
  * Added XAB, PLB, and ROLB opcodes;
  * Fixed IRQ dispatch errors;
  * Various get_info fixes.
  - NamcoSS22 changes (s22.diff):
  * All CPU clocks changed to measured-by-Guru values;
  * Handle the changed M37710 bus width;
  * Temporarily disconnect shared RAM;
  * There's a problem where the 68020's shared RAM test wipes out the 37710's work variables and causes it to crash. I 	suspect there's a register that halts or resets the 37710  Note: Prop Cycle has no POST and doesn't cause this problem, but all the other games do.
  - C352 change (c352.diff):
  * Remove debug printf that accidentally snuck in.
- SPI Improvements [Ville Linde]:
  * Improved (but not yet correct) tilemap decryption;
  * Preliminary sprite priority support.
- PowerPC 403 core: This is basically SuperModel (Sega Model 3 emu)'s PPC core minus the FPU and 6xx-series specific instructions (that stuff isn't ported to MAME yet). As such, it's passed all manner of synthetic PPC torture tests and should be quite reliable for any PPC403-based hardware [Ville Linde, Bart Trzynadlowski, Stefano Teso].
- Virtua Racing improvements [Olivier Galibert, Andrew Gardner].
- Hyperstone CPU Core Improvements [Tomasz Slanina, Pierpaolo Prazzoli]:
  - Tomasz Slanina:
  * Interrputs after call and before frame are prohibited now.
  * Emulation of FCR register;
  * Floating point opcodes (preliminary);
  * Fixed stack addressing in RET/FRAME opcodes;
  * Fixed bug in SET_RS macro;
  * Fixed bug in return opcode (S flag);
  * Added C/N flags calculation in add/adc/addi/adds/addsi and some shift opcodes;
  * Added writeback to ROL;
  * Fixed ROL/SAR/SARD/SHR/SHRD/SHL/SHLD opcode decoding (Local/Global regs);
  * Fixed I and T flag in RET opcode;
  * Fixed XX/XM opcodes;
  * Fixed MOV opcode, when RD = PC;
  * Fixed execute_trap();
  * Fixed ST opcodes, when when RS = SR;
  * Added interrupts;
  * Fixed I/O addressing.
  - Pierpaolo Prazzoli:
  * Fixed fetch;
  * Fixed decode of e132xs_xm opcode;
  * Fixed 7 bits difference number in FRAME / RET instructions;
  * Some debbugger fixes;
  * Added generic registers decode function;
  * Some other little fixes.
- Jaleco Mahjong Driver update [Angelo Salese]:
  * Some games are *almost* playable but still have protection issues;
  * Adjusted Top Speed volume balance.
- Misc fixes [Nathan Woods]:
  * Fixes PORT_INCLUDE by making the final IPT_END appended within input_port_allocate();
  * Added some MESS specific defaults;
  * Spelling fix in IPT_BILL default
- Fixed some Multisession win32 bugs [Chris Kirmse].