MiniMig with AGA

[Hattig]

Results for 28 MHz clock and 256-byte instruction cache. Maybe the speed gain is not impressive but I have yet another option to try.

http://www.yaqube.neostrada.pl/images/SysInfo28-256.gif

I think this is very impressive for a core that was merely a 68000 core a short time ago. Is this with the 16-bit data bus still? Would there be any advantage to implementing a data cache?

5x faster than a stock A1200 and faster than an A3000 is not to be sniffed at.

[Hattig]

Hi,

@cammy,

Yes that is impressive, and with a few more instructions maybe we can have the new expensive minimig board roll over and play dead. Yes I think that the minimig board that duplicates the A500 was a good school project but I saw something the other day walking through a flea market, an Amiga 500 game console that came with 50 Amiga games all embedded in a joystick. It ran off of a couple of double A batts and you could carry it around take it over your friends house and play the 50 Amiga games on it, you could even order a flash card with another 50 games for $49.95.

Now that was impressive.

smerf

And you didn't buy it? You didn't take photos to post here?

Most likely some Chinese company took the Minimig VHDL and made an ASIC with it. Or it's emulated on a fast ARM SoC.

[Hattig]

Hi, Ever try a modern day graphics card with Amiga Forever.

Talk about improvement with no slowdown and you don't even have to eliminate the superhires 8 bitplane. Oh wow: 1280 by 512 usable, good grief what will they think of next for the next new hardware for the Amiga.

Amiga Forever runs at 1280 x 1020 with no problems. Oh no I am really going to make you all angry at me I should be thinking slow expensive buggy new hardware for our favorite machine when Cloanto's new 2010 package runs everything great when you have a newer PC machine. Not a 386 or 486 you know something modern. We are up to 6 cores, and single cores that run 200 times faster than a 68060 miggy. I know lets step it up to a 1.86 ghz ppc chip. (10 year old tech) wow super frog will really fly then.

smerf

I don't think you even understand why people would want Minimig or FPGAArcade, yet wouldn't mind a few issues with the chipsets fixed (mostly sped up).

Amiga Forever is just emulation. It is neat, and useful with the RTG graphics. I have absolutely no interest in it however, I've tried it in the past, but it's just not interesting to me. Having a full reimplementation of the hardware, at a hardware level (FPGA), is far more interesting. I can't explain why, it just is!

Hopefully the video output on FPGAArcade can (or will eventually) clock higher than AGA, allowing higher resolutions than what AGA could drive. In addition adding a chunky mode and a RTG driver would be useful for 3D and desktop uses.

[Hattig]

Just a small update. The CPU core is still clocked at 28 MHz but this time with two separate 256-byte instruction and data caches.

Oh wow, that's awesome progress. Well done! How large is the 68k core now?

[Hattig]

What do you mean with reverse leakage ..?
Is that the only issue? ie the LDO has too much reverese leakage wich prevent the board from turning power off?

Reverse Leakage? Because Amigas are so old, you can have catheter problems? :-o

Thanks for the update MikeJ. We'll be wanting a picture of you running SimCity 2000 AGA soon :p