Game Boy SM83 CPU Core

Re:Game Boy SM83 CPU Core by idonotknowwhy on Monday October 24, 2022 @04:54AM (#33314325)

Yep, we already do. This is cycle accurate

https://github.com/MiSTer-devel/Gameboy_MiSTer

Edit: We can also do GBA and a lot of other cores, all the way up to Playstation 1.

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Re:Game Boy SM83 CPU Core by tinco on Monday October 24, 2022 @06:44AM (#33314974)

Could you explain a bit how your project is different from the one in the article? Why did they implement the SM83 in HDL when you already have such an implementation?

Also, I don't see any specific FPGA's mentioned, what sort of constraints do these projects have? Does it run on a 3$ one, or do you need something bigger /fancier?

Edit: oh sorry didn't realize MIST is the device, it's an Altera Cyclone EP3C25

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Re:Game Boy SM83 CPU Core by mid-kid on Monday October 24, 2022 @07:08AM (#33315157)

The one in the article is based directly on the die scans, while the MiSTer one is a completely custom implementation.

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Re:Game Boy SM83 CPU Core by jonny_eh on Monday October 24, 2022 @06:10PM (#33323308)

How is the custom implementation confirmed to be "cycle accurate"?

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