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Microsoft's 6502 BASIC is now Open Source (2025)

opensource.microsoft.com

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Re: Microsoft's 6502 BASIC is now Open Source (2025)

#5
In 1979, I made a program called VisiBase in this BASIC. It's a visual database modeled after VisiCalc. That won me a joystick in at a competition by the local computer store. :-) Still have the source, that works in an Apple 2 emulator. It's 13 K in ASCII (untokenized).

Re: Microsoft's 6502 BASIC is now Open Source (2025)

#9

Sadly nothing in Scott's blog post about how they obtained the source. Was it still in Microsoft's archives? Did they happen upon some tractor-feed print-outs they had to type in by hand?

I assume today typing in by hand is no longer needed, with text parsing from images being table stakes for LLMs.

Re: Microsoft's 6502 BASIC is now Open Source (2025)

#10

Sadly nothing in Scott's blog post about how they obtained the source. Was it still in Microsoft's archives? Did they happen upon some tractor-feed print-outs they had to type in by hand?

It would also be interesting why it was open-sourced now. I assume if they had done the same last year, the resulting loss of revenue would not have destroyed the plucky little $3T upstart.
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