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recipes/ti84: document usage

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ref #41
This commit is contained in:
Virgil Dupras 2019-11-09 14:20:01 -05:00
parent 2026113480
commit a4190f9984
2 changed files with 26 additions and 3 deletions
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2
kernel/ti/kbd.asm
View File

@ -19,7 +19,7 @@
; *** Code ***
kbdInit:
xor a
ld a, 1 ; begin with A-Lock on
ld (KBD_MODS), a
ret

27
recipes/ti84/README.md
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@ -1,6 +1,6 @@
# TI-84+
**This is a work-in-progress, this is far from complete.**
**This is a work-in-progress**
## Recipe
@ -25,7 +25,7 @@ You will start with a blank screen, it's normal, you haven't pressed the "ON"
key yet. This key is mapped to F12 in the emulator. Once you press it, the
Collapse OS prompt will appear.
**WIP: the keyboard does nothing else than halting the CPU for now.**
See z80e's `KEYBINDINGS.md` file for details.
## Upload to the calculator
@ -51,6 +51,29 @@ Press "1" to continue.
When this is done, you can press the ON button to see Collapse OS' prompt!
## Usage
The shell works like a normal shell, but with very tight screen space.
When pressing a "normal" key, it spits the symbol associated to it depending
on the current mode. In normal mode, it spits the digit/symbol. In Alpha mode,
it spits the letter. In Alpha+2nd, it spits the uppercase letter.
Special keys are Alpha and 2nd. Pressing them toggles the associated mode.
Alpha and 2nd mode don't persist for more than one character. After the
character is spit, mode reset to normal.
Pressing 2nd then Alpha will toggle the A-Lock mode, which is a persistent mode.
The A-Lock mode makes Alpha enabled all the time. While A-Lock mode is enabled,
you have to enable Alpha to spit a digit/symbol.
Simultaneous keypresses have undefined behavior. One of the keys will be
registered as pressed. Mode key don't work by simultaneously pressing them with
a "normal" key. The presses must be sequential.
Keys that aren't a digit, a letter, a symbol that is part of 7-bit ASCII or one
of the two mode key have no effect.
[knightos]: https://knightos.org/
[z80e]: https://github.com/KnightOS/z80e
[mktiupgrade]: https://github.com/KnightOS/mktiupgrade