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Commit Graph

142 Commits

Author SHA1 Message Date
Virgil Dupras
57c1a10434 avra: first steps 2019-12-13 17:38:40 -05:00
James Stanley
1b8b113536 Fix filesystem in shell emulator
We now treat the block device as fixed-size rather than trying to grow it in response
to kernel activity.

Previously, if you tried to create 2 files in a row, only the first 1 would actually appear,
because the device only ever got larger when a byte was written immediately past the end of
the device.

Now we just let the kernel write bytes to the disk anywhere, so new files can be created even
when the previous file is not completely full.

Also, fix buffer overrun in reading filesystem image, and use a more idiomatic fgetc loop.
2019-12-12 16:58:17 -05:00
Virgil Dupras
9ab292a6d5 Add shell automated tests 2019-12-12 14:32:47 -05:00
Virgil Dupras
5b155a5c15 tools: use BASIC's new while loop
Also, increase STDIO_BUFSIZE to 0x40 so that those while loops work.
2019-12-12 12:04:56 -05:00
Virgil Dupras
3db38b0d89 basic: add while command 2019-12-12 11:17:10 -05:00
Virgil Dupras
25d25d017c Replace old shell with BASIC shell
fixes #80
2019-12-11 14:05:34 -05:00
Virgil Dupras
20151a97f8 recipes/rc2014/zasm: use BASIC shell
Also made Makefile actually portable.
2019-12-11 13:01:51 -05:00
Virgil Dupras
9ec71ecfee tools/uploadb: rewrite in C 2019-12-09 22:05:39 -05:00
Virgil Dupras
d9db0a824e Make makefiles and shell scripts portable
It's no longer required to use `gmake` under OpenBSD and shell scripts
no longer require bash.
2019-12-09 09:45:22 -05:00
Virgil Dupras
270ad926c9 recipes/sms: use BASIC shell 2019-12-02 20:18:41 -05:00
Virgil Dupras
66dacd1816 tools/emul: add "Min SP" debug value
This gives the maximum size of the stack at any given moment during the
execution of the program. It's useful to figure out if the stack gets
dangerously close to the heap.
2019-12-02 17:44:54 -05:00
Virgil Dupras
2f07d849a8 tools/emul: deduplicate a little bit of C code 2019-12-02 17:28:01 -05:00
Virgil Dupras
871b06fecf bshell: adjust RAMSTART to avoid clashwith USER_CODE
With a 0x4000 RAMSTART, bshell's RAM usage clashed with USER_CODE, making
RAM-using userapp break everything.
2019-11-30 19:50:23 -05:00
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
43b450ca30 Update bootstrap binaries 2019-11-22 19:57:11 -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
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
69750b4da6 Update bootstrap binaries 2019-11-13 22:28:47 -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
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
2bff486cd2 Update bootstrap binaries 2019-11-10 22:03:46 -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
f41ccdbc81 Update bootstrap binaries 2019-10-17 15:47:39 -04:00
James Stanley
7f7251d57f Fix buffer overrun in shell emulator (#51) 2019-10-15 21:21:40 -04:00
Virgil Dupras
83b314c450 zasm: lower RAM requirements
I've tested RAM usage when self-assembling and there weren't as high
as I thought. zasm's defaults now use less than 0x1800 bytes of RAM,
making it possible, theoretically for now, for a Sega Master System
to assemble Collapse OS from within itself.
2019-10-06 15:42:09 -04:00
Virgil Dupras
e4732d79dc zasm: tighten directive detection a bit 2019-10-06 14:39:47 -04:00
Virgil Dupras
f4b6c7637d zasm: rename #inc to .inc
scas, it's not needed any more.
2019-10-06 14:32:23 -04:00
Virgil Dupras
340a474941 emul/shell: use '@' symbol in jump table 2019-10-04 20:29:42 -04:00
Virgil Dupras
612323f714 zasm: add "last value" symbol (@) 2019-10-04 20:26:21 -04:00
Virgil Dupras
d1735c3a73 zasm: remove last remnants of "old style" variables
This makes zasm suitable to run from ROM.
2019-07-25 14:02:04 -04:00
Virgil Dupras
c2d84563dd zasm: allow duplicate const definition
This will allow interesting override scenarios, adding flexibility.
2019-07-23 16:01:23 -04:00
Virgil Dupras
1dec33e02a zasm: make symbol registry a bit more straightforward
Instead of strings of variable length driving the iteration of the
registry, we do so through records that keep track of lengths and
counts.
2019-07-23 15:21:42 -04:00
Virgil Dupras
cdb206b7a5 zasm: fix nasty (iy+d) misparsing bug
*sob*...
2019-07-23 13:58:18 -04:00
Virgil Dupras
b95f4c8c24 zasm: remove SYM_CTX_PTR 2019-07-22 16:34:40 -04:00
Virgil Dupras
f4f91ebd79 zasm: remove SYM_CTX 2019-07-22 16:13:00 -04:00
Virgil Dupras
311d04e9aa zasm: make symbol registry easily parametrizable
I'm about to split the global registry in two (labels and consts)
and the previous state of registry selection made things murky.
Now it's much better.
2019-07-22 15:13:09 -04:00
Virgil Dupras
34f499184d zasm: add ".bin" directive
Also, remove zasm/test7 because it changes too much all time time
(whenever zasm changes) and isn't precise enough. Too much noise,
not worth it.
2019-07-21 12:58:02 -04:00
Virgil Dupras
01031a780a ed: Add 'w' command 2019-07-21 11:40:26 -04:00