Commit Graph

216 Commits

Author SHA1 Message Date
Virgil Dupras
7c893dada1 basic: can now execute user apps!
Shell replacement sequence beginning in 3, 2, 1...
2019-11-25 22:05:10 -05:00
Virgil Dupras
12bc120375 basic: add bsel, bseek, getb, putb commands 2019-11-24 20:34:23 -05:00
Virgil Dupras
e1df320d44 basic: add ldbas command 2019-11-24 14:26:32 -05:00
Virgil Dupras
13f935aa88 basic: add fls command
Also, add the new `bshell` emulated tool. BASIC is on its way to replace the
shell.
2019-11-24 10:24:15 -05:00
Virgil Dupras
585e9f3b6e tools/emul: add troubleshooting instructions in README
fixes #79
2019-11-23 15:22:26 -05:00
Virgil Dupras
a680fd3328 basic: add support for signed integers 2019-11-23 14:56:23 -05:00
Virgil Dupras
43b450ca30 Update bootstrap binaries 2019-11-22 19:57:11 -05:00
Virgil Dupras
2f71ad6d2f lib/expr: add left/right shifting operators 2019-11-22 18:35:10 -05:00
Virgil Dupras
a03c5ac700 lib/expr: add bitwise operators 2019-11-22 17:16:51 -05:00
Virgil Dupras
972e8221f1 lib/expr: add division and modulo operators 2019-11-22 15:03:16 -05:00
Virgil Dupras
1b01f13105 lib/expr: refactor for easier operator addition 2019-11-22 14:45:12 -05:00
Virgil Dupras
7262993f14 basic: add if 2019-11-21 16:06:14 -05:00
Virgil Dupras
f5b04fc02f basic: add expression support to print
Again, same thing as in zasm.
2019-11-18 15:52:44 -05:00
Virgil Dupras
0bd58fd178 basic: parse hex, binary and char literals
Same thing as in zasm.
2019-11-18 15:22:09 -05:00
Virgil Dupras
1cea6e71e0 basic: add a print cmd
It can only print a decimal literal. But still, that's a big step because
I hadn't implemented decimal formatting yet.
2019-11-18 13:40:23 -05:00
Virgil Dupras
019d05f64c Make the shell a userspace app
That's my mega-commit you've all been waiting for.

The code for the shell share more routines with userspace apps than with kernel
units, because, well, its behavior is that of a userspace app, not a device
driver.

This created a weird situation with libraries and jump tables. Some routine
belonging to the `kernel/` directory felt weird there.

And then comes `apps/basic`, which will likely share even more code with the
shell. I was seeing myself creating huge jump tables to reuse code from the
shell. It didn't feel right.

Moreover, we'll probably want basic-like apps to optionnally replace the shell.

So here I am with this huge change in the project structure. I didn't test all
recipes on hardware yet, I will do later. I might have broken some...

But now, the structure feels better and the line between what belongs to
`kernel` and what belongs to `apps` feels clearer.
2019-11-15 15:37:49 -05:00
Virgil Dupras
cdd0b64570 Modify userspace .org and RAMSTART expectations
Instead of expecting a `USER_CODE` symbol to be set, we expect `.org` to be
set in all userspace glue code. This gives us more flexibility with regards to
how we manage that.

Moreover, instead of making `USER_RAMSTART` mandatory, we make it default to
the end of the binary, which is adequate in a majority of cases.

Will be useful for my upcoming mega-commit... :)
2019-11-15 10:33:13 -05:00
Virgil Dupras
d74b85f146 zasm: allow .org to be specified from command line
Also important for upcoming mega commit...
2019-11-15 09:57:53 -05:00
Virgil Dupras
e5255d22f9 zasm: make .org affect "@" symbol 2019-11-15 08:59:26 -05:00
Virgil Dupras
79e04189b0 Update bootstrap binaries 2019-11-14 21:25:11 -05:00
Virgil Dupras
6e714875dc zasm: Constants now override labels at all times
Will be important for a mega-commit I'm preparing.
2019-11-14 21:16:36 -05:00
Virgil Dupras
7cf3ed38da Extract str.asm from core.asm and make core included by userspace
Most of register fiddling routines (which is now the only thing contained
in care.asm) are used by almost all userspace apps, often in inner loops.

That makes the penalty of using jump tables for those a bit too high.
Moreover, it burdens jump tables needlessly.

Because this unit is very small (now that string routines are out), it makes
sense to always include it in binaries.
2019-11-14 10:14:15 -05:00
Virgil Dupras
0e79035d9c Disable test failing on Travis 2019-11-13 22:37:00 -05:00
Virgil Dupras
69750b4da6 Update bootstrap binaries 2019-11-13 22:28:47 -05:00
Virgil Dupras
82995eb346 zasm: have .fill generate an error on overflow
Can possibly avoid a lot of debugging pain.
2019-11-13 22:27:48 -05:00
Virgil Dupras
8d46895dd3 lib/parse: decimal ending with a whitespace are now valid
Also, make empty strings be parsed as invalid by parseDecimal.
2019-11-13 22:10:06 -05:00
Virgil Dupras
7274dccbe7 Move ASCII consts to ascii.h
And made them shorter in name. The new ascii.h file allow reuse in userspace
code.
2019-11-13 20:38:06 -05:00
Virgil Dupras
f3992ed598 basic: begin an implementation from sratch
Let's see where it will lead us...
2019-11-13 15:28:16 -05:00
Virgil Dupras
1ae51bea3a tests: remove instr blacklist
Because scas isn't used as a reference anymore, no need to blacklist its bugs
anymore.
2019-11-12 20:47:09 -05:00
Virgil Dupras
4de2ce3ceb zasm: add RST instruction 2019-11-12 14:07:45 -05:00
Virgil Dupras
cbc6fb5931 zasm: clean up jump table requirements
There was a little bit of cruft.
2019-11-11 20:21:13 -05:00
Virgil Dupras
17cc28e211 recipes/ti84: use a 3x5 font instead of a 5x7 one
This allow a lot more characters to fit on that tiny screen...

ref #41
2019-11-11 13:26:24 -05:00
Virgil Dupras
2bff486cd2 Update bootstrap binaries 2019-11-10 22:03:46 -05:00
Virgil Dupras
5f6b303e75 zasm: add IX/IY support to SRL, RR and RL 2019-11-10 22:03:18 -05:00
Virgil Dupras
506c3d0a96 zasm: generalize handling of IX/IY in 0xcb upcode family
There's a couple of bit fiddling instructions that didn't have their
IX/IY variant implemented yet and without this commit, each of them
would have required a special routine. Not anymore.
2019-11-10 21:02:18 -05:00
Virgil Dupras
d9d6093287 zasm: simplify (IX/Y+d) handling
We now require less special handling.
2019-11-10 20:16:50 -05:00
Virgil Dupras
c4658591bd ti/lcd: allow for fonts smaller than 5 pixels
That's a lot of code for such a small change, but there's a big difference
between 5 pixels and 4 pixels: 4 pixels requires compositing.
2019-11-09 22:55:15 -05:00
Virgil Dupras
a3c47f6272 Add tests for parseArgs 2019-11-08 10:53:52 -05:00
Virgil Dupras
e972dfe220 Add test documentation 2019-11-08 10:37:52 -05:00
Virgil Dupras
a13a94bbc7 fix typos 2019-11-07 12:13:00 -05:00
Virgil Dupras
ca84b5dac8 recipes/ti84: first step
This was mostly lifted from my "tihello" example, but it required significant
adjustments.

This commit also introduces a font management system. A lot of fonts are
available online, but sources aren't always clear so to avoid copyright
landmines, I re-created my first 5x7 font from scratch.

As it is now, this resulting ROM gets "Collapse OS>" to be displayed on the
LCD screen. Much work still left to do.

ref #41
2019-11-07 11:52:29 -05:00
Virgil Dupras
f395297874 Improve python tools' shebang
Most OS don't have python3 in /usr/bin/python...
2019-11-04 14:43:27 -05:00
Virgil Dupras
2a55bfd375 stdio: remove a layer of indirection in GetC/PutC
We use zasm's ability to use labels in .equ directive.

We didn't do it before because for a while, we were in between scas
and zasm (scas was used in automated tests) so we needed to use the
lowest common denominator: zasm doesn't have macros and scas can't
use labels in .equ directives.

This forced us to add this layer of indirection. But now that we are
completely cut from scas' dependency, we can use this nice zasm's
ability.
2019-11-04 09:55:12 -05:00
Virgil Dupras
a86234c87e Fix typo in shell's emul{Get,Put}C 2019-10-31 18:49:02 -04:00
Virgil Dupras
b745f49186 Rename blockdev's API routines to GetB/PutB
The goal is to avoid mixing those routines with "character devices"
(acia, vpd, kbd) which aren't block devices and have routines that
have different expectations.

This is a first step to fixing #64.
2019-10-30 16:59:35 -04:00
Virgil Dupras
a7aa2fc702 Improve test_parse_z coverage
Will help with #45
2019-10-20 18:19:02 -04:00
Virgil Dupras
f41ccdbc81 Update bootstrap binaries 2019-10-17 15:47:39 -04:00
Virgil Dupras
3b1bbc1751 zasm: support negative displacement for IX/IY
Needed by #30.
2019-10-17 15:38:11 -04:00
Jorde Kang
5460f28cfb Removed unnecessary import sys (#46) 2019-10-15 22:41:44 -04:00
James Stanley
7f7251d57f Fix buffer overrun in shell emulator (#51) 2019-10-15 21:21:40 -04:00