dosbox for amiga 68k?

[NovaCoder]

DosBox AGA

I've always wanted to play this on my A1200.

[NovaCoder]

This port is now DOA

Unfortunately I discovered without some specialized ASM skills (which I lack) it would never be much use on real hardware because it's so friggen demanding!

I did spend a few months working with Matt Hey trying to get an ASM 68k softcore working but we never quite got there unfortunately.

Rather than simply throw away the months of work that I spent porting and optimizing this emulator, I thought I'd upload it so people can see what could have been (using WinUAE).

I've included the full source code so maybe someone will do something good with it.

It is compiled for 060 but seems to run ok if you set WinUAE to 030 + FPU.

Oh well, can't win them all...........  


[youtube]FuXmfMuFJrc[/youtube]

[NovaCoder]

@NovaCoder
How is your port of DosBox compare with PCTask?

Slower

DOSBox is a better choice for gaming, it would have been cool if it was fast enough on real hardware.

I'd say because the program itself is over 20MB you'd need to configure UAE to at least 64MB

[NovaCoder]

Any news on seeing Ultima UnderWorld on our miggies ?

I did actually 'finish' this port for AGA years ago

Unfortunately it's way too slow to be of any much use on a real Amiga.

If I ever get the energy I may try and apply some more speed-up hacks and perhaps use my updated RTG SDL to do an RTG version with window mode support.

Don't have much time for 68k coding these days unfortunately

[NovaCoder]

too bad! the world needs your code!

can you define 'way too slow', though? would be nice to try it out.

Thanks, my boss doesn't think so!



About this slow!

[youtube]1Am-3TjsOWo[/youtube]

[NovaCoder]

it seems I did miss something..
 
 https://www.youtube.com/watch?v=nffOaex-R8Q
 
 is this for real? was it ever finished? I can hardly find anything on this online.

That's another one of my ports, keep up old chap

[NovaCoder]

haha, you have too many projects! however, I knew it was you, I just wanted to know if you ever finished this and where I can obtain more information? its not in your sig, i checked that first

Nope, I never finished it (currently sitting on my A1200's hard drive).

I'm not doing much Amiga coding these days.

[NovaCoder]

alright, thanks for the info. and too bad! hope you'll have time to finish it one day.

My final release is a little bit quicker and might be just enough to play some old PC games if you have enough MIPS (overclocked 060 only).

Obviously if FPGA accelerator cards get fast enough then this port will be awesome for Miggy AGA users

[youtube]sBahgGWG6v0[/youtube]

[NovaCoder]

I recently released an RTG version of my old DosBox 68K port (only took me a few years  )

It's still damn slow on real classic hardware but might be handy for running DOS utils or maybe an old EGA adventure game.

http://eab.abime.net/showthread.php?t=96151

If you do try it on real hardware or FPGA/WinUAE/Amithlon then make sure you set the correct core and cycles in the config file.

For real hardware you should use the 'simple' core and cycles set to 1,000 or even less (fast 060, don't even bother with an 040).   If you have a fast FPGA then you could try the 'simple' core with say 1,000-3,000 cycles and on WinUAE/AROS/Amithlon then it's better to use the more stable 'normal' core and a setting for say 10,000 cycle (depending on how old the game is).

 

[NovaCoder]

No idea how many cycles this was using but DOSBox RTG is working pretty well on Vampire.  An old VGA adventure game or dungeon crawler would probably be playable.

http://youtu.be/a2AW7tDV3Fo

I'd call that a success considering how friggin demanding DOSBox is to run (runs slowly on a Pentium 166 apparently).

[NovaCoder]

https://www.youtube.com/watch?v=tb-0EsIrbfw&feature=youtu.be