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Kawa
Joined: Sun 05 Sep 2010, 15:42:48
Posts: 1344
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 Re: emulator efficiency I won't stop you. And after I finish watching this Kamen Rider episode, I think I'll hook up the VRAM and such on the Asspull III×.
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| Sat 07 Jun 2014, 17:45:39 |
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SoraK05
Joined: Fri 26 Oct 2012, 14:47:06
Posts: 81
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Re: emulator efficiency For turning the ROM to an EXE, is it not a matter of disassembling the ROM according to each opcode and its expected operands, and then patching this as the structure is already set up as 'opcode+operand' throughout, as well as raw data which is also acknowledged (and skipped), as well as adjust any offset references.
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| Sat 07 Jun 2014, 22:32:08 |
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Kawa
Joined: Sun 05 Sep 2010, 15:42:48
Posts: 1344
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Re: emulator efficiency I don't know, man. Get a small example ROM and try it. Don't forget to show us the results and such!
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| Sat 07 Jun 2014, 22:35:14 |
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creaothceann
Joined: Fri 10 Apr 2009, 18:17:56
Posts: 3308 Location: Germany
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Re: emulator efficiency Good luck trying that with self-modifying code, btw. (they're probably rare, but there's bound to be some).
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| Sat 07 Jun 2014, 22:42:34 |
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cr1901
Joined: Fri 03 May 2013, 06:51:50
Posts: 410 Location: NJ
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Re: emulator efficiency You broke the chain  . Also, hello! 
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| Sat 07 Jun 2014, 23:42:48 |
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Exophase
Joined: Sat 18 Apr 2009, 16:06:52
Posts: 2208
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Re: emulator efficiency Self-modifying code may not be that common on a lot of platforms but self-generating and self-loading code is. As far as static recompilation is concerned it's all pretty much the same.
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| Sun 08 Jun 2014, 01:48:55 |
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SoraK05
Joined: Fri 26 Oct 2012, 14:47:06
Posts: 81
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Re: emulator efficiency All instructions including generated code is in the ROM, read by the opcodes/operands.
The ROM is already structured with opcodes/operands + raw data, and some addressing depending on opcode.
I'm referring to mapping the (shorctut/tweaked) emulator version of opcodes and adjustments to the opcodes/operands in the ROM structure, determine raw data for leaving (by expected opcode/operand info) and adjust offsets.
Put this in an emulator framework to allow for embedded instructions to use custom input, output, save state etc.
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| Sun 08 Jun 2014, 02:18:29 |
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Kakashi
Joined: Mon 20 Apr 2009, 08:11:50
Posts: 5266 Location: 日本
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Re: emulator efficiency Emulator versions of opcodes, lol.
Starvin' Marvin, you so funny.
Also, hi!
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| Sun 08 Jun 2014, 02:20:17 |
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CaptainJistuce
Joined: Wed 06 May 2009, 04:13:19
Posts: 4543
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Re: emulator efficiency
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| Sun 08 Jun 2014, 02:43:39 |
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Exophase
Joined: Sat 18 Apr 2009, 16:06:52
Posts: 2208
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Re: emulator efficiency No, that's totally wrong. Generated code isn't in the ROM by definition. I'd like to plead with you to stop making these incomprehensible statements about subjects you are almost completely ignorant of but I know you won't.
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| Sun 08 Jun 2014, 02:53:23 |
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SoraK05
Joined: Fri 26 Oct 2012, 14:47:06
Posts: 81
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Re: emulator efficiency Any generated code is code which will be created by the code in the ROM, and anything of the nature of taking this generated code like from RAM instead of ROM can be determined and dealt with, and either patched on-the-fly or have any possible data which is used to generate this replaced with patched data.
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| Sun 08 Jun 2014, 06:25:18 |
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Kakashi
Joined: Mon 20 Apr 2009, 08:11:50
Posts: 5266 Location: 日本
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Re: emulator efficiency You forgot to say that the code is sent straight to the monitor/speakers.
Ahhh, Starvin' Marvin.
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| Sun 08 Jun 2014, 06:28:49 |
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Sintendo
Joined: Wed 26 May 2010, 19:48:00
Posts: 708
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Re: emulator efficiency You can't just say "X can be determined an dealt with". You should demonstrate how, like Kawa previously told you. Here's another question for you, though. How can you automatically tell what is code and what is data in a ROM?
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| Sun 08 Jun 2014, 07:51:29 |
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kode54
Joined: Fri 10 Apr 2009, 20:54:19
Posts: 2679
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Re: emulator efficiency Simple. Math.
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| Sun 08 Jun 2014, 07:53:15 |
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trap15
Joined: Fri 25 Nov 2011, 21:23:17
Posts: 175 Location: San Diego, California, USA
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Re: emulator efficiency Just a quick reminder:
THIS THREAD IS 23 PAGES LONG
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| Sun 08 Jun 2014, 08:14:14 |
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