Memory-mapped I/O ports
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0x900E0010-0x900E001F - Keypad
(Read?)-Write, half-word (only?)
Keypad map. Each bit represents a key. If bit is cleared, the key is being pressed. Only bit 0 to 11 are used. The mapping depends on the currently used keypad (TI-Nspire or TI-84+).
TI-Nspire keypad map:
| offset | bit 0 | bit 1 | bit 2 | bit 3 | bit 4 | bit 5 | bit 6 | bit 7 | bit 8 | bit 9 | bit 10 | bit 11 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0010 | ret | enter | space | (-) | Z | . | Y | 0 | X | --- | theta | on |
| 0012 | , | + | W | 3 | V | 2 | U | 1 | T | e^x | pi | click |
| 0014 | ? | - | S | 6 | R | 5 | Q | 4 | P | 10^x | EE | ??? |
| 0016 | : | * | O | 9 | N | 8 | M | 7 | L | x^2 | i | ??? |
| 0018 | " | / | K | tan | J | cos | I | sin | H | ^ | > | --- |
| 001A | ' | cat | G | ) | F | ( | E | var | D | caps | < | --- |
| 001C | flag | ??? | C | home | B | menu | A | esc | | | tab | = | --- |
| 001E | up | --- | right | --- | down | --- | left | --- | clear | ctrl | = | --- |
TI-84+ keypad map:
A4000100-A40096FF - Screen
Read-write, byte, half-word, word
Screen buffer. The upper left corner is the first byte. Each grayscaled pixel is 4-bit long. 1111 is white, 0000 is black.