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PostPosted: Tue May 21, 2024 8:02 pm 
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I noticed that the visual6502 python implementation has been used to build an Atari simulation - https://github.com/gregjames/Sim2600.

It's awesome but painfully slow. Has anyone made a similar Atari simulation with the perfect6502 simulation (written in C instead of python)? (https://github.com/mist64/perfect6502)

It seems like perhaps the main tasks would be to implement the TIA and a way of rendering the pixels. The Sim2600 python repo has an implementation of the TIA already, so I guess this would just be a port.

Thanks for any pointers you might have,

Dan


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PostPosted: Wed May 22, 2024 1:41 am 
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Honest question: how would this be better than, say, Stella?

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PostPosted: Wed May 22, 2024 3:24 pm 
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This is for a research project where it's important to have all the transistor values.

Previously this was published: https://journals.plos.org/ploscompbiol/ ... bi.1005268

I want to try some similar experiments. In the paper they say they used a C++ version, but the code looks like Python / Cython to me (https://github.com/ericmjonas/Sim2600). It runs at like 1 KHz, whereas the perfect6502 sim runs at closer to 50kHz. Still not fast, but I can do a lot more experiments that way. With the 1kHz version, it takes literally hours to render enough frames of the game for anything interesting to happen on the screen.


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PostPosted: Wed May 22, 2024 8:41 pm 
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djbutler wrote:
With the 1kHz version, it takes literally hours to render enough frames of the game for anything interesting to happen on the screen.

Gee, I can remember when real computers took hours to accomplish anything.  :D  In fact, way back when, I had a client that had a 1970s-era BASIC Four mini with the old washing machine-sized disks.  That contraption took nearly four hours just to compute the accounts receivable trial balance—and that was without drawing any pictures.  :shock:  When we converted them to one of our AMD K6-powered servers running SCO UNIX, the run time to get the trial balance plummeted to about five seconds.  They were amazed.

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PostPosted: Wed May 22, 2024 8:47 pm 
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What about a 6502 emulator written in ... Minecraft?

Then get it to emulate an Atari 2600 ... at 1 frame/sec.

https://www.youtube.com/watch?v=mq7T5_xH24M

-Gordon

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