Ok, so i am going to start to make my own OS for the TI-84 graphing calculators, or at least i want to. Yet, i have no clue where to start. I would say i am an expert in TI-Basic, but I've heard i need to learn assembly, if someone could give me a few starting points or a rundown/tutorial that would be great. Anything at all.
You will need a good understanding of the calc hardware as well as moderate ASM knowledge to create your own OS.

A good place to start is the wiki which can be found here: http://wikiti.brandonw.net/index.php?title=WikiTI_Home

And some example OS's with source code which can be found here: http://www.ticalc.org/pub/83plus/os/
Undertaking the challenge of writing your own OS is quite complex. You may want to begin by learning ASM, and making a few programs before you begin. I would take a look at ASM in 28 Days, which is a good reference: http://www.ticalc.org/archives/files/fileinfo/268/26877.html

Also, z80 Heaven has some good resources on beginning ASM, found here: http://z80-heaven.wikidot.com/
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