Raspberry MEGA65 image (for Raspberry Pi 400)

Awesome! Thanks a lot for this!
Will the image also work well on an (non overclocked) pi4?
Cheers!

I guess you can 'underclock' a pi 400 as well, in fact, pi 400 IIRC is overclocked pi4, because of having a newer revision of the SoC, allowing that more safely, and also has a huge heatsink metal plate making it safe by default About Xemu/MEGA65: as soon as Hernan's changes are merged into the "mainline Xemu" with probable modifications though (optimizations etc), I really want to introduce framedropping to allow to run on slower machines at the price of not every emulated frames being rendered though ...

Hi Snoopy , thanks a lot for the image, the emulators really work great out of the box

Just a quick question: did you change the pi users default password? I can not ssh into the box due to "wrong password".

Sorry my fault, used the wrong IP (have too many computers )

Great! Any advice for a Raspberry A+/B+? Is there a chance to have a MEGA65 running on one of these, maybe without the fancy VIC-IV functionalities?

Zitat von Snoopy

Zitat von huedrant

Great! Any advice for a Raspberry A+/B+? Is there a chance to have a MEGA65 running on one of these, maybe without the fancy VIC-IV functionalities?

I only have a Raspberry Pi 400 here to try out. In principle, the Xemu should also run with weaker Raspberrys. However, I would only recommend the xc65 (C65 emulator). It's fast enough on the Raspberry.

At least I don't know that you can switch off the VIC-IV properties of the xmega65 to achieve a faster performance. Maybe LGB-Z , the developer of the Xemu, can write something about this?

Why, you've already summarized things quite well Commodore 65 emulation indeed, is kinda OK. I would say, MEGA65 emulation should work as well, till the point somebody wants to establish "MEGA65 fast" (~40MHz) mode where the power of Raspberry PI is not so much enough any more to run the emulation in real time (still can be used, just slower than it should be). I haven't tested Xemu in Raspberry pi "since ages", so I don't know the current situation to be honest ... But the next branch of Xemu for example about MEGA65 emulation (so not hmw ...) uses a VIC-IV emulation which is so crude, it cannot be done too much with "less VIC-IV fancy stuff" So if that can't run real-time either on Raspberry, then we can't do too much, since then it's the CPU emulation performance (etc , ...) is the bottleneck. Though for sure, never say the final word, I have some unfinished works (currently not in the priority list unfortunately) to re-structure memory access emulation (and also CPU emulation) which can (just guessing now!!!) speed up CPU emulation significantly in the future.

Other than these, it's kinda interesting idea to have a "crude" VIC-IV emulation layer as well for "slow" computers. However the problem that where you draw the line. Emulated MEGA65 should "boot" and at least BASIC, and things should work, this already needs quite substance of VIC-IV emulation (even if crude) and then we would have double work to maintain two kind of VIC-IV emulations, "crude but fast" and "better but slower" :-/ But surely, it's very much depends what we think about "without the fancy VIC-IV functionalities" Without ANY video output, it would be much faster I guess, for example But that's not so much useful.

Moin Snoopy

Ich fand deinen Ansatz sehr interessant und wollte mir den XEmu auf meinem Pi400 nun auch installieren (kompilieren) unter ARM64, leider bekomme ich keine GUI angezeigt, es sind auch keine vorhanden wenn ich mit der Option -gui starte ... eine Idee was ich da beim kompilieren beachten muss ?

Snoopy

Hmmm, die sollte eigentlich von der VICE installation her drauf sein, aber ich prüf das heute Abend mal, danke

Sorry to answer in English, but I don't speak German, and I even used google translate to be able to understand the discussion here. Since you want to _compile_ Xemu you don't need only the GTK3 libraries but the development version as well (surely if you also _compiled_ VICE with GTK3, then it's fine). As README of Xemu says, you need to have the "libgtk-3-dev" package (I believe at least, it's the same on raspi as well).

Zitat von LGB-Z

Sorry to answer in English, but I don't speak German, and I even used google translate to be able to understand the discussion here

Same ... so thanks for answering in English!

I really love that we've such an active and talented German user community for C64 & Mega65. And we have our Germany friends to thank for the Mega65 itself!

Where possible, if they're knowledgeable in English then if they can please post in it ... that'll help us to all understand each other

does it run on a normal Raspberry Pi 4 ?

Hi,
i successfully installed it on my Raspi3A+ Thank you Snoopy for the image

I can use the 911001.bin as described above and the provided Basic programs are working.

Now i wanted to use ROM 920377 inside Xemu. I loaded 910828.bin patched it with bspatch
with 920377.bdf, renamed it to MEGA65.ROM and
loaded it again via "load rom" but after that process I get only a black screen.

Any hint, what I'm missing?

I can confirm that the new ROMs do not work with older xemu installs, but xemu will warn you that the config file on the virtual SD card is too old if you try to update the SD files ...

I used the SD image and successfully compiled it as described here

Raspberry 65 ;-)
The Juggler Demo runs, so now I can play around with it