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 samo79
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Re: Guru Meditation sponsors Petunia development
Posted on 17-Sep-2006 20:04:20
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Elite Member
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Joined: 13-Feb-2003
Posts: 3505
From: Italy, Perugia | | |
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| Thanks Guru Meditation 
@Rachy
A cooperation between you and Richard Drummond would be great, my dream is to play some classic game (and not only games) directly with Petunia !
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Dirk-B
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Re: Guru Meditation sponsors Petunia development
Posted on 17-Sep-2006 20:24:04
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Super Member
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Joined: 8-Mar-2003
Posts: 1185
From: Belgium | | |
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| @ samo79
Yeah, good idea !
Just open a directory-tool, double click on the game,
and off you go. Then while the game is running you
could do a top-menu to do settings in eUAE.
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weirdami
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Re: Guru Meditation sponsors Petunia development
Posted on 17-Sep-2006 21:04:11
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Regular Member
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Joined: 30-Mar-2003
Posts: 231
From: Unknown | | |
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| Petunia is officially part of AmigaOS4. |
Cool. |
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evilrich
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Re: Guru Meditation sponsors Petunia development
Posted on 17-Sep-2006 22:15:59
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Cult Member
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Joined: 19-Oct-2003
Posts: 534
From: Unknown | | |
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| @samo79
Quote:
| A cooperation between you and Richard Drummond would be great, my dream is to play some classic game (and not only games) directly with Petunia ! |
1) A JIT won't help much with playing classic games. E-UAE's 68k interpreter already performs at 68030-level on a AmigaONE. It's not the performance of the CPU emulation that's the problem in general when playing classic Amiga games but the emulation of the Amiga chipset and the generation of the Amiga display. The AmigaONE's woeful memory bandwidth makes the problem worse.
2) Petunia emulates an 68020 - not a 68000, which most games require. Writing a 68000 JIT is more problematic because there's no easy way to handle self-modifying code. The 68000 doesn't have an instruction cache, for instance, so 68000 code doesn't have to issue cache-flush instructions when modifying code which the JIT could make use of (you could do it with MMU tricks, though).
3) Emulating classic games requires a reasonable balance between the relative timings of the CPU and chipset emulations. I don't know if that is possible with Petunia.
4) Petunia is not open-source. I don't know whether it is ethical or even legal to make use of it from a GPL'd application like E-UAE.
Cheers,
Rich |
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evilrich
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Re: Guru Meditation sponsors Petunia development
Posted on 17-Sep-2006 22:21:34
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Cult Member
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Joined: 19-Oct-2003
Posts: 534
From: Unknown | | |
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| Now isn't Andreas one of the most wonderfull amiga guys on this world ? |
I quite agree. Andreas is a generous supporter of various Amiga projects. Well done, that man!
Cheers,
Rich |
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amigakit
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Re: Guru Meditation sponsors Petunia development
Posted on 17-Sep-2006 23:21:28
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Amiga Kit
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Joined: 28-Jun-2004
Posts: 2519
From: www.amigakit.com | | |
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Samwel
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Re: Guru Meditation sponsors Petunia development
Posted on 18-Sep-2006 0:58:50
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Elite Member
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Joined: 7-Apr-2004
Posts: 3404
From: Sweden | | |
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| @evilrich
Wouldn't a JIT leave more CPU power for chipset emulation?
Making it work even smoother on bad hardware such as A1's.
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AmigaPapst
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Re: Guru Meditation sponsors Petunia development
Posted on 18-Sep-2006 9:00:38
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Cult Member
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Joined: 2-Nov-2003
Posts: 634
From: Amigavatikan | | |
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| @Guru
Thanks for this nice action. 
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alexw
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Re: Guru Meditation sponsors Petunia development
Posted on 18-Sep-2006 9:19:40
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Cult Member
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Joined: 6-Mar-2004
Posts: 578
From: Saarbrücken, Germany | | |
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| @evilrich:
Quote:
| Petunia is not open-source. I don't know whether it is ethical or even legal to make use of it from a GPL'd application like E-UAE. |
Wouldn't it be possible and legal to use Petunia from E-UAE as an OS component?
Alex.
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