Demo Coder Challenge - Vampire Beta Project !

[Gunnar]

Originally Posted by britelite

Oh really, does the Vampire also speed up the chipmem-access?

EDIT:
Wrong values - as we can only get 50% of the cyles.
We can do 320x240 * 64 colors at 25 FPS

This would be good for game or demo

That the CPU can only get halve of the buy cycles is an unfortunate limit.

[britelite]

Originally Posted by Gunnar

160x240 * 4096 colors at 60 FPS

No such HAM-mode available on ECS

Just think about how to do this - you will see that it can be done - if you really want.

Sure thing, why don't you show us how to

[Gunnar]

Originally Posted by britelite

No such HAM-mode available on ECS


Sure thing, why don't you show us how to

Not HAM but direct color

Try to think about it....

[britelite]

Originally Posted by Gunnar

Not HAM but direct color

Try to think about it....

You mean writing to the color registers directly fast enough on ECS? I'll believe it when I see it

[Gunnar]

Originally Posted by britelite

You mean writing to the color registers directly fast enough on ECS? I'll believe it when I see it

You should get a Vampire to see it.


But Yes - now you see my point.
Disable Chipmme DMA and poke the register directly.
As your Turbo card is effectively a DMA machine itself - you can do this 100% if you want.

I think there is some room for making real cool demos for coders willing to do so.

[britelite]

Originally Posted by Gunnar

You should get a Vampire to see it.

This should work on any accelerator on the A600, so why don't you provide an executable

But Yes - now you see my point.
Disable Chipmme DMA and poke the register directly.
As your Turbo card is effectively a DMA machine itself - you can do this 100% if you want.

And you've actually tried this?

[Gunnar]

[QUOTE=britelite;949143]

Originally Posted by britelite

This should work on any accelerator on the A600, so why don't you provide an executable

But only if you get the timing fot the Chip bus properly

Originally Posted by britelite

And you've actually tried this?

Why do you think that it would not work?

[StingRay]

I have a slight feeling of Déjà Vu. For some reason I suddenly thought about disassembling Kickstart ROMS in 1 week. *Cough*.

[britelite]

Originally Posted by Gunnar

Why do you think that it would not work?

I asked, have YOU tried it?

[robinsonb5]

Originally Posted by britelite

This should work on any accelerator on the A600, so why don't you provide an executable

Actually it sounds like the kind of specialised application where the FPGA is ideal. If you've taken over the machine and are running software from SDRAM, so can keep the CPU off the Amiga bus except during, say, vblank interrupts, there's no reason why the FPGA couldn't be set up to spoon-feed graphics data from SDRAM straight into $DFF180 without the CPU being involved.

On the other hand, attempting this feat in software alone would be crazy difficult.

[Gunnar]

Originally Posted by britelite

I asked, have YOU tried it?

No I did not try it.
We just tossed demo idead around at lunch.

But you did not say why you think it should not work.

[britelite]

Originally Posted by Gunnar

No I did not try it.

What a surprise.

But you did not say why you think it should not work.

I never said it wouldn't work. I just implied you don't actually know if it works either

[Gunnar]

Originally Posted by britelite

I never said it wouldn't work. I just implied you don't actually know if it works either

This talk does lead no where.
If you know the bus protocol of the AMIGA then you know what works and what not. There is no room for speculation - the protocol is very clear.


Its obvious that if wanted you can do on an A600/Vampire effects that will even astonish AGA/060 users...

So if someone is seriously interested in doing something like this then lets talk about the options.

[britelite]

Originally Posted by Gunnar

This talk does lead no where.

Indeed, talk is cheap and actions speak louder than words

Its obvious that if wanted you can do on an A600/Vampire effects that will even astonish AGA/060 users...

Can't wait for you to show off some cool effects

[StingRay]

Oh yes, the Déjà Vu is getting stronger.

[Gunnar]

Forget about the other idea. Does not work.

But nevertheless you can relative easily display the following:

LOWRES 320x200
with 6 PLANES = 64 colors

This works fine on any old AMIGA

On any Turbo card you can render into a Chunky buffer
and copy the display over to the chipmem screen.

The available chipmem bandwidth is enough to update the screen with like 25 FPS.

This is a reasonable resolution and nice enough colors for a game / demo to use.

[StingRay]

Originally Posted by Gunnar

But nevertheless you can relative easily display the following:

LOWRES 320x200
with 6 PLANES = 64 colors

Excellent.

Originally Posted by Gunnar

On any Turbo card you can render into a Chunky buffer
and copy the display over to the chipmem screen.

Awesome.

[Gunnar]

The big advantage that you have over a normal 68060 sytem is that you can seperate the two jobs

a) create the screen

b) copy the screen to display


This means you can fully focus with the CPU on rendering.
This makes coding
a) easier
b) you could focus a lot more CPU time on the render part.

[britelite]

Originally Posted by Gunnar

Forget about the other idea. Does not work.

And this is why it's better to keep quiet about things until you've actually tried to do it yourself

LOWRES 320x200
with 6 PLANES = 64 colors

Not that impressive anymore, but of course more realistic...

This is a reasonable resolution and nice enough colors for a game / demo to use.

It is, but nothing that hasn't been seen already

Originally Posted by Gunnar

The big advantage that you have over a normal 68060 sytem is that you can seperate the two jobs

Are you saying the core will include a c2p which works independently from the cpu? In other words, does it perform a c2p and transfer to chipmem while the cpu is free to do other stuff?

[Lonewolf10]

Originally Posted by britelite

And this is why it's better to keep quiet about things until you've actually tried to do it yourself

I agree, but sometimes over excitement etc. can influence us. I admit I sometimes spread the word about projects long before they are finished for that exact reason, and another (OT) example is when I made £800 trading commodities on the stock market in 2 weeks. (FYI: I make about £1200 a month working as a lab technician...)
Sometimes you can't help shouting these things from the rooftops