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recipes/ti84: use the BASIC shell
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# shell
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# shell
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**This shell is currently being replaced with the
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[BASIC shell](../basic/README.md). While it's still used in many places, it's
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being phased out.**
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The shell is a text interface giving you access to commands to control your
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The shell is a text interface giving you access to commands to control your
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machine. It is not built to be user friendly, but to minimize binary space and
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machine. It is not built to be user friendly, but to minimize binary space and
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maximize code simplicity.
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maximize code simplicity.
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@ -8,6 +8,7 @@
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## User guide
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## User guide
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* [The shell](../apps/shell/README.md)
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* [The shell](../apps/shell/README.md)
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* [The BASIC shell](../apps/basic/README.md)
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* [Load code in RAM and run it](load-run-code.md)
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* [Load code in RAM and run it](load-run-code.md)
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* [Using block devices](blockdev.md)
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* [Using block devices](blockdev.md)
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* [Using the filesystem](fs.md)
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* [Using the filesystem](fs.md)
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@ -51,6 +51,7 @@ init:
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call aciaInit
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call aciaInit
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ei
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ei
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call basInit
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jp basStart
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jp basStart
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@ -10,7 +10,7 @@ There is, however, a built-in USB controller that might prove very handy.
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## Recipe
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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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This recipe gets the Collapse OS BASIC 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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screen as output and its builtin keyboard as input.
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## Gathering parts
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## Gathering parts
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@ -66,9 +66,19 @@ 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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When this is done, you can press the ON button to see Collapse OS' prompt!
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## Validation errors
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Sometimes, when uploading an upgrade file to your calculator, you'll get a
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validation error. You can always try again, but in my own experience, some
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specific binaries will simply always be refused by the calculator. Adding
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random `nop` or reordering lines (when it makes sense, of course) should fix
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the problem.
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I'm not sure whether it's a bug with the calculator or with `mktiupgrade`.
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## Usage
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## Usage
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The shell works like a normal shell, but with very tight screen space.
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The shell works like a normal BASIC shell, but with very tight screen space.
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When pressing a "normal" key, it spits the symbol associated to it depending
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When pressing a "normal" key, it spits the symbol associated to it depending
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on the current mode. In normal mode, it spits the digit/symbol. In Alpha mode,
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on the current mode. In normal mode, it spits the digit/symbol. In Alpha mode,
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@ -37,19 +37,31 @@
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.equ STDIO_PUTC lcdPutC
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.equ STDIO_PUTC lcdPutC
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.inc "stdio.asm"
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.inc "stdio.asm"
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; *** Shell ***
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; *** BASIC ***
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.inc "lib/util.asm"
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.inc "lib/parse.asm"
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.inc "lib/args.asm"
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.inc "lib/stdio.asm"
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.equ SHELL_RAMSTART STDIO_RAMEND
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.equ SHELL_EXTRA_CMD_COUNT 0
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.inc "shell/main.asm"
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; RAM space used in different routines for short term processing.
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.equ SCRATCHPAD_SIZE 0x20
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.equ SCRATCHPAD STDIO_RAMEND
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.inc "lib/util.asm"
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.inc "lib/ari.asm"
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.inc "lib/parse.asm"
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.inc "lib/fmt.asm"
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.equ EXPR_PARSE parseLiteralOrVar
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.inc "lib/expr.asm"
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.inc "basic/util.asm"
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.inc "basic/parse.asm"
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.inc "basic/tok.asm"
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.equ VAR_RAMSTART SCRATCHPAD+SCRATCHPAD_SIZE
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.inc "basic/var.asm"
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.equ BUF_RAMSTART VAR_RAMEND
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.inc "basic/buf.asm"
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.equ BAS_RAMSTART BUF_RAMEND
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.inc "basic/main.asm"
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.out BAS_RAMEND
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boot:
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boot:
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di
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di
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ld hl, RAMEND
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ld sp, RAMEND
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ld sp, hl
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im 1
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im 1
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; enable ON key interrupt
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; enable ON key interrupt
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@ -67,12 +79,15 @@ boot:
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halt
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halt
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main:
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main:
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; Fun fact: if I place this line just above basStart like I would
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; normally do, my TI-84+ refuses to validate the binary. But placed
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; here, validation works fine.
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call basInit
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call kbdInit
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call kbdInit
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call lcdInit
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call lcdInit
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xor a
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xor a
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call lcdSetCol
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call lcdSetCol
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call shellInit
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jp basStart
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jp shellLoop
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handleInterrupt:
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handleInterrupt:
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di
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di
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