[SEGA] DGEN 1.31.x 161212

Rambo III (SEGA Enterprises Ltd., 1990)

Author: zamaz <zamaz@users.sourceforge.net> Date:   Sun Dec 16 18:50:30 2012 +0100
 

• md: fix memory regions for Musashi
• Remove writable bit from ROM region, it must always be checked by the appropriate handler.
• Fix memory regions array size.

 Author: zamaz <zamaz@users.sourceforge.net> Date:   Sun Dec 16 17:06:25 2012 +0100
 

• debug: add M68K instructions counter  
• Useful when stepping over an arbitrary number of instructions. This counter can be displayed with the "reg" command and is reset with the M68K.

Author: zamaz <zamaz@users.sourceforge.net> Date:   Sun Dec 16 17:03:52 2012 +0100

• debug: optimize stepping over multiple instructions  
• No need to end the M68K timeslice early when doing so.

Author: zamaz <zamaz@users.sourceforge.net> Date:   Sun Dec 16 15:16:23 2012 +0100
 

• md: fix compilation warning
• Some implementations (MinGW?) wrongly expect a non-const second argument to memcpy().

Author: zamaz <zamaz@users.sourceforge.net> Date:   Sun Dec 16 15:06:27 2012 +0100

• debug: implement set(b|w|l|r) commands 
• This commit adds writing capability to M68K memory and registers through the new commands setb (byte), setw (word), setl (long) and setr (register).

Author: zamaz <zamaz@users.sourceforge.net> Date:   Sun Dec 16 13:29:47 2012 +0100

•     debug: implement stepping over multiple instructions

Author: zamaz <zamaz@users.sourceforge.net> Date:   Sat Dec 15 22:00:37 2012 +0100

• md: configure memory regions for Musashi  
• Use m68k_register_memory() for M68K ROM and RAM regions.

Author: zamaz <zamaz@users.sourceforge.net> Date:   Sat Dec 15 21:50:22 2012 +0100
 

• musa: implement direct access to memory regions   
• I took this idea from Genesis Plus GX (and other optimized CPU emulators). Most memory (RAM/ROM) accesses can be optimized by registering memory regions to avoid the cost of going through functions. 
• M68K_REGISTER_MEMORY must be enabled in m68kconf.h before using m68k_register_memory().

Author: zamaz <zamaz@users.sourceforge.net> Date:   Sat Dec 15 21:34:47 2012 +0100

•     md: add missing context for StarScream

Author: zamaz <zamaz@users.sourceforge.net> Date:   Sat Dec 15 12:27:37 2012 +0100
 

• sdl: implement optional thread for displaying frames  
• When bool_screen_thread is enabled, DGen/SDL creates a separate thread to offload the displaying of frames. 
• This is only useful on slower machines where flipping video buffers takes time, especially when V-sync is enabled and doing so blocks DGen/SDL until the next frame without consuming CPU time (such as the case of Dispmanx on the Raspberry Pi when bool_doublebuffer is also enabled).
• This requires threads to be compiled-in (--enable-threads) and doesn't work with OpenGL (apparently an SDL issue).

Author: zamaz <zamaz@users.sourceforge.net> Date:   Sat Dec 15 09:53:29 2012 +0100

• sdl: make double buffering configurable
• The ability to disable this can be useful on slower hardware such as the Raspberry Pi.

Author: zamaz <zamaz@users.sourceforge.net> Date:   Fri Dec 14 23:40:21 2012 +0100

• main: manage events after each dropped frame 
• On slow systems, DGen/SDL becomes somewhat unresponsive when droppin many frames. This commit addresses this by checking events after each dropped frame.

Author: zamaz <zamaz@users.sourceforge.net> Date:   Sun Dec 9 22:35:58 2012 +0100

• musa: reapply DGen patches
• This commit completes Musashi 3.31 integration into DGen.

Author: zamaz <zamaz@users.sourceforge.net> Date:   Sun Dec 9 22:19:26 2012 +0100

• musa: import version 3.31
• Replacing the aging 3.3.1 version currently used by DGen/SDL should solve various emulation bugs.
• This commit also updates .gitignore and musa/Makefile.am because fewer files are generated by m68kmake.

Author: zamaz <zamaz@users.sourceforge.net> Date:   Mon Dec 10 00:29:18 2012 +0100

• configure: add autogen.sh  
• Edd finally got me to include this file.

Author: zamaz <zamaz@users.sourceforge.net> Date:   Sun Dec 9 18:22:52 2012 +0100

• fm: implement MJazz
• MJazz comes from DGen 1.14 (the original Win32 version). Enabling bool_mjazz initializes three FM chips instead of one. Each additional chip runs at twice the rate of the previous one, causing the MJazz sound effect. 
• Dave's description:
• MJazz option - puts 2 more FM chips in the Megadrive for a sort of 22 channel sound boost. Can sound good. Slows things down a lot.

Author: zamaz <zamaz@users.sourceforge.net> Date:   Sun Dec 9 12:15:38 2012 +0100
 

• configure: improve ARM systems detection 
• Matching "arm-*" in the the target triplet is too restrictive. 

Author: zamaz <zamaz@users.sourceforge.net> Date:   Sun Dec 9 12:22:53 2012 +0100

•     save: fix DrZ80 dump for AF registers

Author: zamaz <zamaz@users.sourceforge.net> Date:   Sat Dec 8 22:34:06 2012 +0100

• debug: fix breakpoints once again
• Commit bfc9c6d5b04cf2105c73b57653a0f4b24504374e (debug: disassembler-related fixes) didn't really fix the current instruction problem when hitting a breakpoint, as the pointed instruction is still executed before the debugger takes over. 
• Modify debug.cpp to use the updated m68k_set_instr_hook_callback() API and avoid this problem.

Author: zamaz <zamaz@users.sourceforge.net>
Date:   Sat Dec 8 23:59:28 2012 +010

• musa: enhance instruction hook callback 
• Allow the callback to return a value (int). If nonzero, m68k_execute()    won't execute the current instruction and return directly.
• This is required for proper breakpoints support.

Author: zamaz <zamaz@users.sourceforge.net> Date:   Sat Dec 8 18:40:24 2012 +0100

• md: add workaround for DrZ80 PC-related crashes
• DrZ80 cannot guarantee PC won't leave the allocated memory region. This commit adds a permanent jump after the end of the Z80 memory to avoid crashing in such a situation.

Author: zamaz <zamaz@users.sourceforge.net> Date:   Sat Dec 8 00:41:37 2012 +0100

•     cyclone: use CycloneReset()

Author: zamaz <zamaz@users.sourceforge.net> Date:   Fri Dec 7 01:33:27 2012 +0100
 

•     cyclone: update to version 0.099 (SVN)
•     URL: http://cyclone68000.googlecode.com/svn/trunk/Cyclone
•     Repository Root: http://cyclone68000.googlecode.com/svn
•     Repository UUID: a1691e18-3824-b1bf-9eda-98bade0df06b
•     Revision: 12
•     Node Kind: directory
•     Schedule: normal
•     Last Changed Author: notasas@gmail.com
•     Last Changed Rev: 12
•     Last Changed Date: 2011-02-13 18:49:17 +0100 (Sun, 13 Feb 2011)

•     The following changes have been merged:
•     - Makefile.am.
•     - Updated config.h for DGen/SDL.
•     - Compilation warnings fixes.

Author: zamaz <zamaz@users.sourceforge.net> Date:   Fri Dec 7 01:17:03 2012 +010

• mem: improve Cyclone's checkpc()
• Ensure PC is always bound to a defined memory region to avoid crashes.
• Add missing regions: saveram, empty area after ROM.