RE: Semi OT: MS Pacman recompiler test program

Excellent Neil!!!
Very nice. Not being a programmer I can only imagine the work involved in
doing this.
How difficult would it be to do that to STAR WARS?

Jim

>From: Neil Bradley <nb@synthcom.com>
>Reply-To: vectorlist@vectorlist.org
>To: vectorlist@vectorlist.org
>CC: rasterlist@vectorlist.org
>Subject: VECTOR: Semi OT: MS Pacman recompiler test program
>Date: Wed, 18 Aug 2004 00:44:29 -0700 (PDT)
>
>I thought, since we're all geeks here, that this might be of interest.
>
>Inspired by Graham Toal's CCPU recompiler, I've written a recompiler that
>currently recompiles Z80->C. It's a generic framework, however, and I've
>already got a 6502 disassembler with a 6809 one being coded as I type
>this.
>
>As a proof of concept, I've plugged it in to a Ms Pacman platform
>extension (no sound). IT currently is running @ 50 FPS because SDL
>(graphics library) timer isn't granular enough to produce 60FPS. I'll have
>to use a Windows or perhaps Posix timer to get something closer to the
>original.
>
>System tested - Pentium 4, 2.4Ghz, 512K cache, 512MB of RAM, Radeon 9800
>Pro w/128MB, Windows XP SP 2
>
>Pure emulation runs the game at around 7K FPS with no graphics. My
>assembly language core runs it around 14K FPS. Unoptimized recompilation
>of the C file given below is about 12KFPS. Optimized through the C
>compiler (MSVC), I'm getting 24KFPS on this machine.
>
>Anyway, here is the executable if anyone is interested. Press '3' to coin
>up, '1' to start 1 player, '2' to start 2 players, and the arrows to move.
>And escape to exit. I would be very interested in your results of trying
>it on various machines with the "-nogfx" command line option. That'll give
>raw results. Windows binary below:
>
>http://www.synthcom.com/~nb/mspacmanExe.zip
>
>And the recompiled source code for MS Pacman is here (look for
>mspacman_exec()).
>
>http://www.synthcom.com/~nb/mspacmanRecomp.zip
>
>And a disassembly of the source binary produced by the recompiler:
>
>http://www.synthcom.com/~nb/mspacmanDisasm.zip
>
>At this point I've done nothing but timing coalescing in terms of
>optimization. I haven't yet gone through and done unnecessary flag
>removal, nor any other "heavy" optimizations. They're on the "todo" list,
>but it's far enough along that I thought you all might be interested in
>checking it out. All of the optimization thus far is done in the core, so
>anyone writing a back end for the
>
>As soon as I bundle up Orion (the recompiler), I'll post a URL for the
>latest version.
>
>-->Neil
>
>-------------------------------------------------------------------------------
>Neil Bradley "Your mistletoe is no match for my T.O.W.
>missile!"
>Synthcom Systems, Inc. - Santabot - Futurama
>ICQ #29402898
>---------------------------------------------------------------------------
>** Unsubscribe, subscribe, or view the archives at
>http://www.vectorlist.org
>** Please direct other questions, comments, or problems to
>chris@westnet.com

_________________________________________________________________
Get ready for school! Find articles, homework help and more in the Back to
School Guide! http://special.msn.com/network/04backtoschool.armx

---------------------------------------------------------------------------
** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org
** Please direct other questions, comments, or problems to chris@westnet.com
Received on Wed Aug 18 07:34:32 2004