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

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

#11
post #8
post #7

Do you think computing history would have been much different if Microsoft made a 6502 Pascal interpreter instead?

Pascal is a lot broader language and won't fit in sub 16KB of ROM (even if you exclude monitor [call-151])

Maybe they could have implemented a useful subset of Pascal.

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

#16

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).

Please, put it in a public git somewhere!

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

#19
Previous discussion:

Microsoft BASIC for 6502 Microprocessor – Version 1.1 - https://news.ycombinator.com/item?id=45118392 - Sept 2025 (198 comments)

Related ongoing thread:

Microsoft open-sources "the earliest DOS source code discovered to date" - https://news.ycombinator.com/item?id=48253386 - May 2026 (110 comments)

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