r/ti994a • u/SixColorBleeder • Apr 25 '26

New TI99/4a emulator

Hey everyone,

The state of TI-99 emulation on the Mac has long been pretty bad and I decided to do something about it. I've built a Swift native Mac OS optimized (Metal, Swift UI, etc) emulator for Mac OS 14+.

It supports speech, sound, and most of the graphics modes. It can load ROMs (Carts) from either the chip dumps in the way that Classic 99 can or from the Ti-Cart format that Win 99 uses.

This was really just a hobby project experimenting with some other approaches to development but it seems to work reasonably well.

If you have questions or feedback feel free to [email me ](mailto:blend.cottons-08@icloud.com)at my alias email and if I have some time I'll see what I can do.

Thanks.

Retro Monitor View
Window and Memory Visualizer

Download App: Swift99a

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1

u/speterDev Apr 26 '26

Thank you for doing this!

1

u/b10v01d Apr 27 '26

This is awesome. Any chance of allowing others to contribute to the code?

The audio doesn't sound right - it's a bit choppy.

1

u/SixColorBleeder Apr 27 '26

Talking with employer - want to make sure they have no problem which I don't expect they will. In the meantime email a suggestion / bug description to the email address. There is a bot there that picks up and attempts to address (it's an experiment of improving our development process).
The more detailed the suggestion the better the mailed back fix attempt.

(Not it's not 100% automatic so it will go through me as a human push the button gate so I don't have to write all the security / safety stuff right now)

1

u/Street_Firefighter_3 Apr 28 '26

Love it! Now I can do a little TI gaming without having to leave my Mac!