OctaMED screen "jumpy" with RTG. This cant be right??

[ChaosLord]

Hi again,

I recently installed a Picasso II in my A4000 and it seems to be working fine with an old CRT monitor.

However, in OctaMED Soundstudio, the tracker window moves along very jerky when playing MOD files.

Before I installed the Picasso, the screen scrolled very smoothly on my old 1084s.

Initially, I thought i had selected too high a resolution for the Picasso, but even after reducing the resolution to 800x600 and 8 colours, the problem is still exactly the same.

Hopefully someone can help me out as I don't see how it is possible for AGA to scroll smoother than a Picasso II.

Thanks folks!!

AGA = Amiga
Picasso2 = PC gfx card

[ChaosLord]

Lots of stuff that works correctly on Amiga Real Machines does not work correctly (or at all) on pc gfx card machines.

[ChaosLord]

Well since you ONLY use your Amiga for Octamed Sound Studio and since I love SoundStudio I will tell you a secret but very EVIL hack.  You can disable the gfx card compatibility with AmigaOS (make it more incompatible than it already is).

This hack will break tons of software.  You have been warned.

Set this environment variable this way and see if it helps your problem.

Code: [Select]

ENV:Picasso96/DirectColorMask: No
Its very OS hostile to activate that.... but it can speed blitting up a huge amount when it no longer has to be compatible to the Amiga.

[ChaosLord]

But I am using a real Amiga and a real Amiga GFX card.

You are not using a "real Amiga GFX card".  You are using a PC gfx card chip bolted onto your Amiga in a highly incompatible manner.

It can't directly do masked blits so it must emulate them.  (that hack I gave u turns off the emulation).

It might also have broken vertical blank interrupts.  

And of course it is missing 7 of the sprites.

And it has no copper and there is no way to track the raster beam.  So it is completely alien and not Amigalike at all.

I thought GFX cards were meant to speed things up / make things better generally.

I thought they were to cause endless problems and make ppl get mad and hate the Amiga.

If you really ONLY use your Amiga for Octamed Sound Studio then you would have been much better off buying a hardware flickerfixer so you could run OMSS in 640x400 or 640x512 without flicker (that is how I do it)

I have a gfx card in my Amiga but I keep it disabled 99% of the time.