Bitman6502

I'm still looking for a (working!) tool that limits the CPU freq automatically once a temperature limit has been reached.

shows a setting for max CPU frequency set to 1950 MHz, and a temperature graph in the background with 78° max temperature

I actually finally seem to have found a tool to effectively limit the CPU speed and thus avoid overheating....

YouTube video by 8bit-times by André Fachat CC2025 and Updates on the MicroPET (Ep.35)

Some updates on the MicroPET, and impressions from the classic computing 2025 from last weekend!
#8bit #mos6502 #8bittimes
youtu.be/vvN65JlFd0E

A photo of a part of a screen of a ThinkPad W510 with temperature displays, showing CPU temperature in the range of 80 to 95 degrees Celsius

Rendering my new video is putting stress onto that old machine ... probably time to get a new one ...
#8bit #mos6502 #8bittimes

A Commodore 8032 showing the start screen of the Asteroids game

A Commodore PET with a HSG high speed vector graphics card, where you can play asteroids!
#8bit #mos6502 #Commodore

3 PET clones, and one original PET 4032

Today in Hof, Germany: the classic computing event with loads of classic machines to see!
I'll be presenting my MicroPET Commodore PET clones!
#8bit #mos6502 #MicroPET #Commodore @wearecommodore.bsky.social

For being newbie, a great start! I didn't notice!

Btw on my mobile, the site banner isn't even showing!

Advertised an article on the Amiga with a picture of an IBM PC? That isn't even in the article as far as I can see?
Please....!

Microsoft Releases Historic 6502 BASIC - Microsoft Open Source Blog Explore the original 6502 BASIC—now open source! Dive into retro code, history, and emulators. Fork it, run it, and relive computing's roots.

While Commodore just got revived, Microsoft released the source code for Microsoft BASIC as used in the Commodore PET and others under the MIT open source license! opensource.microsoft.com/blog/2025/09...
#8bit #mos6502 @wearecommodore.bsky.social

Home | Commodore

We've been sleeping for 30 years. Please excuse us. Now, the best-selling home computer ever is back. Unplug The Chaos. Return To The Pixel. #wearecommodore www.commodore.net

Commodore PET - Wikipedia

Hey, remember Commodore PET?

https://en.wikipedia.org/wiki/Commodore_PET

#discontinued #nostalgia

A lunar lander is displayed in a dimly lit environment, showcasing its intricate design with reflective materials. In the foreground, a person sits at a commodore PET playing space invaders.

The absolutely best place to play Space Invaders

caching changes is basically tracking deltas (if you don't want to compare the whole model on save - that depends on the model size) and a difference only comes in if consecutive changes affect the same parts of the model.2/2

That's another option. You need to weigh in the size of the model, the total runtime, the number of changes per runtime, and how many changes affect the same part of the model. The latter is probably the most important. 1/2

If you have a deterministic model, you only need to save the changes to it in case you do changes. Might be much less data, possibly depending on the amount of erosion. But probably better to compress anyway

I love the 6502. You can just look at the code and understand it. (Except for all the weird branching modes, but that's it's own thing)

And hooking it up to hardware? Slap a buffer between it and your other chips and it'll just talk to them. To the 6502, everything is a memory location.

Frauke Brosius-Gersdorf verzichtet im Richterstreit auf erneute Kandidatur Die SPD hatte sie vorgeschlagen, CDU und CSU hatten sie verhindert: Frauke Brosius-Gersdorfs gescheiterte Wahl zur Bundesverfassungsrichterin sorgte für eine Regierungskrise. Nun zieht sich die Profes...

Herzlichen Glückwunsch CDU, CSU und Spahn. Ein Sieg für die AfD und andere Rechtsradikale, eine Niederlage der Demokratie. www.spiegel.de/politik/deut...

Can you keep up with the Commodore?

Actually just know how to build logic circuits from logic equations and registers. And then you just need to learn the formalisms like syntax

Basically VHDL is a way to describe logic equations and registers - basic logic stuff. And most of my VHDL is just like that. The rest is compiler magic

There are certain limitations regarding memory bandwidth that actually made me use C64 like sprites as well. The sprite info needs to be fetched in time, and there are only so many off screen cycles available...

Oh, you're asking about the 'code'? I meant VHDL code I use to program the FPGA

Yes it's FPGA. But you need to control the video output, esp if you want to be somewhat compatible with the PET's CRTC chip with its flexible screen geometry. So, you can use it like a CRTC for most parts, with additional registers similar to the VDC and VIC-II

The video resolution is fixed either VGA 720x576p50 or 720x480p60 (or half framerate for TV compat.) The PET CRTC can produce various screen geometries, with 320/640x200 by default. Those are just put into that 720x576 box ('frame canvas' maybe my wording isn't ideal), with the rest being border.

Video is 6bit RGB, hires up to 720x576, various colour modes. 8 sprites. More details see here github.com/fachat/upet_...

Unofficial opcodes don't work indeed. The hardware should support pulling the CPU core into the FPGA but haven't tested that. Haven't seen any (old) programs using unofficial opcodes, though. That became more popular with the C64 ...

Only for the video and memory mapping. 65816 otherwise, from 1MHz up to 13.5MHz, with VGA 720x576 video output

Oh and it does let you decide everytime which model you want to run, from 2001 to 8296

That's a PET reproduction with all new parts, modern interfaces, and many extensions

What started out as a repair video for a broken PET 3032 became a video on repairing two PET keyboards first: youtu.be/bPpjxiyjXZ8 (the rest of the repair is to follow)
#8bit #mos6502 #commodore #commodorepet