TFX on a PiStorm32

[Angus]

Okay..... It's just that there seems like there's very little difference between an 030 and an 060 with it.

[jotd]

probably AGA display. Chip memory is often a limitation. And Phase 5 060 board is notoriously slow with chipmem...

[Angus]

Originally Posted by jotd

probably AGA display. Chip memory is often a limitation. And Phase 5 060 board is notoriously slow with chipmem...

Okay Jean-Francois, thanks for the clarification.

[alexh]

It doesn't make any sense. The PiSTorm CPU and FastRAM is 100x 040 speed. If the only thing in chipRAM was the screen buffer it should be able to make 40-50fps. It must be horrendously inefficient use of the screen buffer

[tomcat666]

Originally Posted by jotd

nope. Tornado is full fastmem. It's just too ambitious.

Very strange... it seems some hard fps limiter somewhere then... pistorm32 tornado AGA:

[ Show youtube player ]

[abu_the_monkey]

it seems some hard fps limiter somewhere then

could be, F1GP was locked at 8fps back in the day, regardless of what cpu you had unless you patched the exe with the editor by Oliver Roberts.

[Karlos]

Is there a viable disassembly of the code anywhere?

[Angus]

Originally Posted by Karlos

Is there a viable disassembly of the code anywhere?

I was having a google, and there have been some pc mods to the game, because a few years ago the source code was found on an old cd. I didn't see any mention of the Amiga source code, but it didn't say it wasn't there either. There's discussion and links to the source here: http://dogsofwarvu.com/forum/index.php/board,50.0.html See also: https://github.com/TornadoGame/Tornado

[jotd]

Good find, but it's asm so not for amiga.

[Aardvark]

Tornado doesn't have fps limiter, it can be butter smooth in WinUAE.

[tomcat666]

Originally Posted by Aardvark

Tornado doesn't have fps limiter, it can be butter smooth in WinUAE.

Yes, with unlimited chip ram and blitter speeds... otherwise not so much.

[Aardvark]

Originally Posted by tomcat666

Yes, with unlimited chip ram and blitter speeds... otherwise not so much.

That was my point, there must be a chipset bottleneck, and not hard fps limiter as you said.

[tomcat666]

Originally Posted by Aardvark

That was my point, there must be a chipset bottleneck, and not hard fps limiter as you said.

True that, sorry, it looked like that because I had the same speed in WinUAE (with everything on cycle exact) as on pistorm.

[Seiya]

it depends how is set emu68. on WinUAE if you emulate a stock A1200 it is exaclty like in that video shwoing pistorm32 performance.
Not need to change blitter or unlimited chipram. If you disable cycle_exact and put cpu_speed at maximun the game is smooth.
If you maintain cycle_exact and change cpu_multiplier you can reach good level of fluidity.

Pistorm32 emulate processor, but it share chipset on motherbord. So very fast processor, but it is connected at very slow hardware.

[alexh]

Originally Posted by Seiya

Pistorm32 emulate processor, but it share chipset on motherbord. So very fast processor, but it is connected at very slow hardware.

3D games, especially later ones, don't tend to use the "very slow hardware" (e.g. the blitter) they only use a screen buffer in ChipRAM and a back buffer usually in FastRAM. The only "slow" operation is the copy of the screen from FastRAM to ChipRAM but it has predictable timings. With PiStorm running emu68 (as it is now) you can get 40-50 fps FastRAM->ChipRAM copy.

The problem will be this game must not use the chipRAM screen buffer very efficiently.

I speculate this could be fixed.

[Angus]

How well does the PiStorm 32 handle pc emulation?
Obviously there are "better" ways, but if you got Amiga Dosbox running MS-DOS Tornado (which includes the mission planner and Command parts unlike the Amiga version) would it be able to handle that at a decent framerate?

[alexh]

PC-Task 4.4 Dynamic can emulate 286@100MHz or 386@25MHz

[ Show youtube player ]

[Angus]

Yes, I've used it to play the original Mechwarrior on my 060, works well... but Tornado is going to be a bit too ambitious isn't it? But I don't know anything about Amiga DOSBox.

[Seiya]

But does emu68 working in jit?

[tomcat666]

Originally Posted by Angus

Yes, I've used it to play the original Mechwarrior on my 060, works well... but Tornado is going to be a bit too ambitious isn't it? But I don't know anything about Amiga DOSBox.

Tornado PC DOS running in DOSBOX on A1200 with pistorm32 rpi4 2.2Ghz:

[ Show youtube player ]

Unfortunetly couldn't get it to run under PC-Task Dynamic..