ScummVM 0.9.1 - now for Classic Amiga!

[Matt_H]

@ AMIGAZ

Not as smooth as the game running natively, but definitely playable without too much frustration. Note that this is only for low-res games with the most basic rendering engines. Monkey Island 3 is definitely too much for the 68K.

[motorollin]

I don't see why it should be slow. If I understand ScummVM correctly, it is an interpreter for a common format of point-and-click game data files. Isn't that exactly what the original game does? If ScummVM runs natively on a 68k Amiga, I don't see why it should be any slower than the original game using the same data files, also running natively on a 68k Amiga.

--
moto

[AmigaMance]

I don't really know but perphaps it's because it is using SDL. Every SDL based game that i have played is damn slow.

[uncleted]

Have you tried fullscreen?

The source code I've seen for classic SDL is horribly inefficient for windowed mode.

I tried a port of ScummVM 0.9.1 using the old MorphOS backend updated a bit and modified, but it tends to crash a lot and doesn't work consistently (it may work on my A4000/060 but not under WinUAE and vice versa) so I never really bothered much with it.  The problem seems to be related to the horrible quasi-threading for sound/timing.

[UweRyssel]

@motorollin:

The interpretation of the game data files is
not the problem. The slow down is caused by
emulation of the sound card. The older games
haven't music data in a sample format. They
have commands for the sound card (Adlib or MIDI),
which have to be emulated. That's why the reduction
of the output rate will increase the game speed.

@AmigaMance:

It doesn't use SDL. It bases on Morphos-Backend.

@all:

At my side no bugs appear. Can you send me
your hardware and software configuration
so I can isolate the systems where these bugs
occur.

Uwe

[AmiKit]

Hi Uwe! I sent you an email, have you got it?

[motorollin]

UweRyssel wrote:
The interpretation of the game data files is
not the problem. The slow down is caused by
emulation of the sound card. The older games
haven't music data in a sample format. They
have commands for the sound card (Adlib or MIDI),
which have to be emulated. That's why the reduction
of the output rate will increase the game speed.

Interesting. Why can't there be a separate programme which converts the Adlib/MIDI data to an IFF sound file? Then when the game runs, it can play the IFF sound file through the Amiga's native output instead of emulating a sound card.

--
moto

[uncleted]

Uwe would you mind telling me what you're using to compile the code?  I'm using a cobbled together GCC cross-compiler running under Windows and I'm having a hard time generating stable code that works across machines.

Do you have Amiga specific source or a makefile I can look at?

I'd love to have a stab at getting a really solid ScummVM for Classics.

[UweRyssel]

I'm using native gcc 2.95.3. The last versions including 0.7.1 were done with StormC4.

There are some minor modifications in common
ScummVM code and major modifications in the backend
code. I changed the confik.mak and config.h files a bit, too. I can send you the files if you post me your eMail address (you can find my addr. on my homepage).

[Flashlab]

How does Doom Attack emulate the Doom Midi music so fast?