MiSTer FPGA Forum

The cause for the crashes (8000 000B) are the mathlibs, which may try to use calls for the 68881/68882 that isn’t available. 68040.library traps those calls that aren’t available on 040 and perform them in software instead (essentially 68881/68882 emulation). There are mathlibs that do not use FPU, and hence will not cause such problems - I wonder ...

I tried using the 3.1.4 ROM from Hyperion and the Workbench that comes with it, but it still had the problem with clicking icons even though the install disk should have a 68040 library. OS 3.1.4 does NOT come with 68040.library, you are supposed to install CPU libraries from CPU card provider - or the CPU libraries from ThoR (MMULib). Running Ami...

OK, here is a new core and kernel module. http://www.64kib.com/minimig_irq_core.tar.gz Where do I find the sources for this module? As I wrote earlier, I build my own kernels, and hence the "magic version" is different than the "official" kernel :) /root# insmod /media/fat/Amiga/minimig_module/minimig-irq.ko insmod: ERROR: coul...

So JIT and MMU? In other 68k emulators those have been mutually exclusive - either super fast JIT or relatively slow “non JIT”, but with MMU.

There is no JIT option for qemu, I guess?

Can’t expect too much when emulating full 040 with MMU and (hence) no JIT

Regarding the 68040 libraries, I think the problem with the mmulib ones are either the mmu, or perhaps that it tries to “fix” known issues with the real 68040s that aren’t necessarily there with a software emulated 68040…

Oh, use 68040.library from OS 3.1, it works

I wanted to ask earlier, what is the reason for using system mode? Normallly, system mode is used for emulating a particular hardware configuration in addition to CPU, but is that really the case here? Thinking a little more, I suppose it is - interfaces to the real hardware only exists in system-mode I guess :) Btw - I am ready to try out the new ...

What FPU emulator is this?

allyourbasekris wrote: ↑Sun May 02, 2021 8:56 pm Just saw this project, It's a 68k emulator written for ARM that targets the amiga processors. I don't know how useful it would be. https://github.com/captain-amygdala/pistorm

See earlier discussions here, any time you see “musashi” mentioned, it’s the pistorm emulator

What I find really strange is how all benchmarks say everything is much faster than tg68, while in reality it is so much slower, heh...

Noone really has a working setup yet, we are all experimenting. Btw you don’t need ssh, you can just press F9 in the menu core, log in and start the 68k emulation from there, after for example a 20 sec sleep, enough so you can F12 and start the hybrid core before CPU emulation kicks in.

Some first impressions... :) * turned off PPP, set UART to "none" (does it matter? I see no difference really) * more or less untampered OS 3.1.4.1 * turned off Minimig RTG, use P96 with "native" driver and HD720 mode (32 pens) * installed CPU libraries (+ mmu.library - http://aminet.net/package/util/sys/Mu680x0Libs) * with musa...

I have some test code that was used to find bugs in tg68, which surely can be used again, and also software that use FPU... what kind of precision can we expect?

If you cannot understand, then just wait till it is ready for end-users.

Where is the Sysinfo screenshot!

Just thinking outside the box (literally)... What's the capability of the IO header on the DE10-Nano? It's fast/capable enough for SDRAM; would it be fast enough for a RAM+CPU board, like we used to have in trapdoor expansion for amiga 1200 and the like? i.e., for those who really want a faster CPU in their simulated amiga, would it be feasible fo...

sounds like what some people really want are 68k MMU and FPU. and if you’re running amigaOS both are mostly irrelevant. Not really - FPU is supported and is used when available, by OS libraries. But that is really beside the point, which is that there is plenty of SOFTWARE that not just use FPU, but sometimes require FPU. If all you want to use Am...

Back in the days (mid 90ies) some fellow computer student friends and I concluded that the probably easiest and cheapest way for us to get faster Amigas, would be to use mind altering drugs that changed our own perception of time - maybe something to consider, hehe

This has been discussed here and you can find his posts on the subject. Please point to them, I find only 6 posts here by Mike and 106 over at atari-forum, but nothing that really covers what you write... I just see his tg68 spin-off that he calls m68k which he has put on github already, which is more like a 020... nothing about 040/060. I see kol...

Oh lordy, I just realised who QuartexNOR is and that exlains all the revisionism regarding "the vampire situation" and all the rest... Anyways - all this writing and wishful dreaming of a faster 68k core for MiSTer is pointless, for many reasons... * the development of the 68k cores used are mostly done by atari people who don't frequent ...

oh, that - http://amiga.kolla.no/femu.zip

breiztiger wrote: ↑Wed Mar 10, 2021 6:42 am hi can someone make a build package ready to install please ?

What do you mean by “a build package”?

I have dockerfiles for building kernel and firmware, building the minimig core is still a “manual” job that takes place in Windows (AFAIK).

FEMU works, but is super slow (using the math libraries). What potentially could be done, is to use FEMU as a starting point for FPU emulation on the ARM processor.

So nobody here misses a CPU with MMU capabilities? That's at least my main takeaway from this thread so far. I don’t miss it because I have that with software CPU emulation, I don’t see much point in implementing it on FPGA. The memory of the MiSTer is already quite different than old “classic” fast page RAM, so it is doubtful you can even do in a...

Bas wrote: ↑Thu Mar 04, 2021 5:04 pm That's quite a bold statement: the only useful hardware config.

The only useful hardware config *missing*! Just about all configs there are working and useful solutions for, but fast CPU with fast, latency free, CPU independent native chipset... that is missing.

Fast 68k CPU + ECS/AGA on FPGA is the only useful hardware config missing, and that is easiest done by moving CPU to the ARM using JIT software emulation.

Not so, AMIX also runs on A2000 with A2620 or A2630 cards, Commodore even shipped these as A2500UX.

https://bigbookofamigahardware.com/bboa ... aspx?id=21