2019-11-08 03:52:29 +11:00
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# TI-84+
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**This is a work-in-progress, this is far from complete.**
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## Recipe
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This recipe gets the Collapse OS shell to run on the TI-84+, using its LCD
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screen as output and its builtin keyboard as input.
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## Build the ROM
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Running `make` will result in `os.rom` being created.
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## Emulate through z80e
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[KnightOS][knightos] has a handy emulator, [z80e][z80e] for TI calculators and
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it also emulates the screen. It is recommended to use this tool.
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Once z80e is installed (build it with SDL support) and `os.rom` is created,
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you can run the emulator with:
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z80e-sdl -d TI84p --no-rom-check os.rom
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You will start with a blank screen, it's normal, you haven't pressed the "ON"
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key yet. This key is mapped to F12 in the emulator. Once you press it, the
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Collapse OS prompt will appear.
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**WIP: the keyboard does nothing else than halting the CPU for now.**
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## Upload to the calculator
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2019-11-08 05:42:40 +11:00
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**WARNING: the instructions below will wipe all the contents of your calculator,
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including TI-OS.**
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To send your ROM to the calculator, you'll need two more tools:
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[mktiupgrade][mktiupgrade] and [tilp][tilp].
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Once you have them, you need to place your calculator in "bootloader mode",
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that is, in a mode where it's ready to receive a new binary from its USB cable.
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To do that you need to:
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1. Shut down the calculator by removing one of the battery.
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2. Hold the DEL key
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3. But the battery back.
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4. A "Waiting... Please install operating system now" message will appear.
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Once this is done, you can plug the USB cable in your computer and run
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`make send`. This will create an "upgrade file" with `mktiupgrade` and then
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push that upgrade file with `tilp`. `tilp` will prompt you at some point.
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Press "1" to continue.
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When this is done, you can press the ON button to see Collapse OS' prompt!
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[knightos]: https://knightos.org/
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[z80e]: https://github.com/KnightOS/z80e
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[mktiupgrade]: https://github.com/KnightOS/mktiupgrade
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[tilp]: http://lpg.ticalc.org/prj_tilp/
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