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Software News   Software News : Guru Meditation sponsors Petunia development
   posted by GuruMeditation on 17-Sep-2006 0:00:49 (7402 reads)
Since the beginning of the Petunia development sometime late 2000, Įlmos Rajnai has been using a classic Amiga to do the work. Every compilation has taken 10 minutes or more, but that is about to change.



Guru Meditation has donated an AmigaOne XE to the Petunia developer and further development will continue on this immensly more powerful platform. Compile times have been reduced to a 20th of the previous time.

Įlmos Rajnai has promised to keep using the Amiga 4000 so that optimization to the code will be easier to spot. Developers, still testing their code on legacy hardware, will more easily spot where things are slow, has a better chance of producing optimized code.

Guru Meditation
Project Petunia
    

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PosterThread
samo79 
Re: Guru Meditation sponsors Petunia development
Posted on 17-Sep-2006 19:04:20
#21 ]
Elite Member
Joined: 13-Feb-2003
Posts: 3437
From: Italy, Perugia

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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Sam440ep Flex 800 Mhz 1 GB Ram + AmigaOS 4.1 Update 6
AmigaOne XE G3 800 Mhz - 640 MB Ram - Radeon 9200 SE + AmigaOS 4.1 Update 6

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Dirk-B 
Re: Guru Meditation sponsors Petunia development
Posted on 17-Sep-2006 19:24:04
#22 ]
Super Member
Joined: 8-Mar-2003
Posts: 1180
From: Belgium

@ 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 
Re: Guru Meditation sponsors Petunia development
Posted on 17-Sep-2006 20:04:11
#23 ]
Regular Member
Joined: 30-Mar-2003
Posts: 231
From: Unknown

Quote:
Petunia is officially part of AmigaOS4.


Cool.

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evilrich 
Re: Guru Meditation sponsors Petunia development
Posted on 17-Sep-2006 21:15:59
#24 ]
Cult Member
Joined: 19-Oct-2003
Posts: 534
From: Unknown

@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 
Re: Guru Meditation sponsors Petunia development
Posted on 17-Sep-2006 21:21:34
#25 ]
Cult Member
Joined: 19-Oct-2003
Posts: 534
From: Unknown

Quote:
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 
Re: Guru Meditation sponsors Petunia development
Posted on 17-Sep-2006 22:21:28
#26 ]
Amiga Kit
Joined: 28-Jun-2004
Posts: 2423
From: www.amigakit.com

Great stuff Andreas!


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Samwel 
Re: Guru Meditation sponsors Petunia development
Posted on 17-Sep-2006 23:58:50
#27 ]
Elite Member
Joined: 7-Apr-2004
Posts: 3404
From: Sweden

@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 
Re: Guru Meditation sponsors Petunia development
Posted on 18-Sep-2006 8:00:38
#28 ]
Cult Member
Joined: 2-Nov-2003
Posts: 628
From: Amigavatikan

@Guru
Thanks for this nice action.


_________________
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A4000T CyberstormPPC 604e-200Mhz/060/128MB+CybervisionPPC 8MB + AmigaOS4
and anymore other Amigas...

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alexw 
Re: Guru Meditation sponsors Petunia development
Posted on 18-Sep-2006 8:19:40
#29 ]
Cult Member
Joined: 6-Mar-2004
Posts: 578
From: Saarbrücken, Germany

@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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