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The "Not Quite Amiga but still computer related category" => Amiga Emulation => Topic started by: Foebane on June 10, 2007, 11:04:34 PM

Title: Why doesn't WinFellow work with the AF "amiga-os-130.rom" file?
Post by: Foebane on June 10, 2007, 11:04:34 PM
I got Amiga Forever a long time ago, but I've been forced to use crappy WinUAE because WinFellow refuses to work with the only KS 1.3 ROM file available to me, "amiga-os-130.rom".

Why is this? And what can I do to fix it? All I want to do is run OCS/ECS games, and when I try it on WinUAE, they slow to a crawl.

So how can I get this ROM file to work with WinFellow?
Title: Re: Why doesn't WinFellow work with the AF "amiga-os-130.rom" file?
Post by: Piru on June 10, 2007, 11:08:33 PM
crappy WinUAE?
slow to a crawl?

Forgot to enable JIT perhaps?

Anyhow, AmigaForever ROMs are encrypted.
Title: Re: Why doesn't WinFellow work with the AF "amiga-os-130.rom" file?
Post by: Doobrey on June 11, 2007, 12:02:50 AM
Quote

Piru wrote:
Anyhow, AmigaForever ROMs are encrypted.


That's easy enough, use it with WinUAE/E-UAE and Blizkick's SaveROM to dump the ROM to disk.

But there's also the problem of the AmigaForever ROM's have some instructions in exec patched to unused opcodes. Unless WinFellow's 68k emulation supports these opcodes, it still won't work.

That was Amiga Inc's brilliant plan for copy protection BTW.
Title: Re: Why doesn't WinFellow work with the AF "amiga-os-130.rom" file?
Post by: Piru on June 11, 2007, 12:22:53 AM
@Doobrey
Quote
But there's also the problem of the AmigaForever ROM's have some instructions in exec patched to unused opcodes.

But doesn't that also mean that the GPL emulation would need to have support for those poked opcodes? If so, it'd be trivial to replicate that in Fellow...
Title: Re: Why doesn't WinFellow work with the AF "amiga-os-130.rom" file?
Post by: _ThEcRoW on June 11, 2007, 02:40:09 AM
I wouldn't recommend jit for ocs games. As for slow winuae, what computer are you trying it on?. Surely a pentium 100 is not enough for Amiga emulation...
Title: Re: Why doesn't WinFellow work with the AF "amiga-os-130.rom" file?
Post by: Foebane on June 11, 2007, 01:06:59 PM
How about an Athlon 64? Fast enough?

I sorted it out now, I didn't have the timings set to "A500 speed".

But I would still like to know why WinFellow is included in AF if it doesn't work with the ROM file?
Title: Re: Why doesn't WinFellow work with the AF "amiga-os-130.rom" file?
Post by: Piru on June 11, 2007, 01:40:05 PM
AmigaForever ROMs are encrypted.
Title: Re: Why doesn't WinFellow work with the AF "amiga-os-130.rom" file?
Post by: Golem!dk on June 11, 2007, 02:56:39 PM
Quote
But I would still like to know why WinFellow is included in AF if it doesn't work with the ROM file?


It should work, you just need to have the keyfile present as well, IIRC it is used for decrypting the roms.
Title: Re: Why doesn't WinFellow work with the AF "amiga-os-130.rom" file?
Post by: Foebane on June 11, 2007, 10:18:17 PM
It turns out the keyfile was present the whole time I was trying WinFellow, so obviously it doesn't like the AF ROMs.

In the past, I had my old ROM taken from my actual Amiga and that worked fine with WinFellow, but when I got AF I got rid of it. I wish I hadn't, now.

Is there any other way to get a KS 1.3 ROM? I don't have my Amiga anymore.
Title: Re: Why doesn't WinFellow work with the AF "amiga-os-130.rom" file?
Post by: odin on June 11, 2007, 10:48:59 PM
*cough*
Google
*cough*
Title: Re: Why doesn't WinFellow work with the AF "amiga-os-130.rom" file?
Post by: Foebane on June 12, 2007, 12:41:04 AM
Hey, ODIN, your suggestion didn't bring up anything useful. So what was the point of it?
Title: Re: Why doesn't WinFellow work with the AF "amiga-os-130.rom" file?
Post by: Thomas on June 12, 2007, 07:31:22 AM
Quote
your suggestion didn't bring up anything useful


It does. Just look a little bit more careful. It's illegal to download copyrighted ROMs, you know. So certainly you won't find illegal download sites easily. But they *are* there and they *can* be found with Google.

Regarding encrypted ROMs, older versions of WinUAE required that the rom.key file was explicitely mentioned in the config. Current versions just assume the file is in the same directory as the ROM file. So I think that WinFellow (which AFAIK has not been updated for some time) still needs the path to the rom.key file in its config.

IMHO Doobrey's purposal to run Transrom or similar inside WinUAE in order to get an unexcrypted version of the ROM file is worth a try, too.