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284 Commits

Author SHA1 Message Date
Virgil Dupras
ffdc58739a ti84: HelloWorld! 
In emulator of course...
 2020-05-08 11:36:50 -04:00
Virgil Dupras
b90efb0f7f ti84: first glyph on screen! 
On the emulator of course...
 2020-05-08 09:07:44 -04:00
Virgil Dupras
58ec54fc97 ti84: wip 
Gave more priority to CPU in the emulator because initialization would
otherwise be horrendously slow.
 2020-05-08 07:56:34 -04:00
Virgil Dupras
114e753b64 ti84: WIP 2020-05-08 06:50:34 -04:00
Virgil Dupras
ab6a2688fe recipes/trs80: self-hosting 2020-05-06 12:38:33 -04:00
Virgil Dupras
b89fa2981f recipes/trs80: move RECV program to blkfs 2020-05-05 22:21:27 -04:00
Virgil Dupras
31119c2de3 xcomp: move all offset spitting to the end of the unit 
I'd like to move this code, along with all recipe contents, to blk/.
It's easier if "emul-related" code is gathered at the same place.
 2020-05-05 20:10:04 -04:00
Virgil Dupras
986a40d3e2 trs80: override NL to avoid double newlines 2020-05-04 09:21:10 -04:00
Virgil Dupras
f023f9bcb4 Pack core words blks a bit tighter 
With all this recent movements, we had a bit of a fragmentation
issue.
 2020-05-02 21:47:32 -04:00
Virgil Dupras
931c812394 Remove cmp 
Not worth the complexity and space.
 2020-05-02 19:57:56 -04:00
Virgil Dupras
07f807edee recipes/trs80: making progress on floppy drivers 2020-04-30 16:10:35 -04:00
Virgil Dupras
65f359bda4 recipes/trs80: can write compiled version to floppy 2020-04-30 11:13:25 -04:00
Virgil Dupras
0044011f06 Move AT28 and TRS80 drivers to higher blocknos 
I'm reserving the 100-200 range for non-bootstrapping needs.
 2020-04-29 21:04:10 -04:00
Virgil Dupras
b046aba7f9 recipes/trs80: running! 
no floppy yet.
 2020-04-29 12:26:44 -04:00
Virgil Dupras
61b2e02351 xcomp: remove XOFF and use ORG and BIN( instead 2020-04-28 09:37:00 -04:00
Virgil Dupras
f97df4614e recipes/trs80: wip 2020-04-28 07:51:41 -04:00
Virgil Dupras
ee79df225e typo 2020-04-27 09:44:37 -04:00
Virgil Dupras
efed0e249e recipes/rc2014/selfhost: add verification instructions 2020-04-27 09:24:40 -04:00
Virgil Dupras
6c51ea1ebb recipes/rc2014/selfhost: complete instructions 
I have yet to test the whole process on real hardware. Soon.
 2020-04-26 20:20:36 -04:00
Virgil Dupras
f690cb2e5b recipes/rc2014/sdcard: use driver from blkfs 
This completes the migration of all Collapse OS code into blkfs!
 2020-04-26 19:50:38 -04:00
Virgil Dupras
865f4f9256 Move AT28 driver to blkfs 
And adjust rc2014/eeprom recipe
 2020-04-26 15:18:28 -04:00
Virgil Dupras
7c692c1111 recipes/rc2014: include readln directly in stage 1 
XPACK is more efficient than stripfc was, we can pack more stuff in 8K.
We now have enough space to fit readln.
 2020-04-26 14:52:55 -04:00
Virgil Dupras
dee7eea497 Move link.fs to blkfs 2020-04-26 14:37:54 -04:00
Virgil Dupras
4d8574c1fe recipe/rc2014: use core libs from blkfs 2020-04-26 13:57:44 -04:00
Virgil Dupras
a2f164ecc3 emul: bootstrap to stage2 from within Collapse OS! 
Big bootstrapping change which greatly reduces the role of the modern
operating system in the bootstrapping process.
 2020-04-26 10:24:09 -04:00
Virgil Dupras
6767012ebd recipe/rc2014/selfhost: new recipe 2020-04-25 19:24:55 -04:00
Virgil Dupras
4160c8ebbf recipes/rc2014: busting the 8K limit again! 2020-04-25 08:15:17 -04:00
Virgil Dupras
1bd191e86a Move /emul/forth/* to /emul 
Less noisy this way
 2020-04-24 17:53:58 -04:00
Virgil Dupras
f19a5e1f71 Remove recipes/rc2014/zasm 
That becomes irrelevant in Forth
 2020-04-24 10:59:28 -04:00
Virgil Dupras
44403c3d4c Move icore to blkfs 
The way is clear for complete stage1 bootstrapping on the RC2014
target!
 2020-04-23 15:14:14 -04:00
Virgil Dupras
8fbbf5209a Copy sdc driver to blkfs 2020-04-23 13:55:00 -04:00
Virgil Dupras
a19376df6c Copy ACIA driver to blkfs 
We can get rid of acia.z80, but not of acia.fs yet, we still need it.
 2020-04-23 12:42:41 -04:00
Virgil Dupras
dd6ce1b8fe Avoid using (xentry) outside xcomp config 2020-04-23 12:09:31 -04:00
Virgil Dupras
fcd77f80ab Use blk's boot.z80 2020-04-22 21:49:44 -04:00
Virgil Dupras
7a0e63746f parse: don't validate 0x and 0b lengths 
It doesn't serve much purpose and takes up many precious bytes. And,
after all, parsed didn't do it either...
 2020-04-21 20:40:23 -04:00
Virgil Dupras
372524fd19 Move xcomp to blocks 2020-04-21 20:30:14 -04:00
Virgil Dupras
4967c2add2 Merge z80c.fs and boot.fs into boot.z80 2020-04-20 21:27:34 -04:00
Virgil Dupras
bf49ca2ed2 recipes/rc2014: fix Makefile 
It didn't have z80a anymore.
 2020-04-20 19:22:43 -04:00
Virgil Dupras
98191d0b0d recipes/rc2014/sdcard: now works under Forth! 2020-04-19 16:56:37 -04:00
Virgil Dupras
dfaa1dc101 link: add "offset" argument to RLDICT 
As long as our target was the first word of the "user" dict, using
target's prev to compute offset was fine, but when the target is not
the first word, this system breaks down.

This is the case when, instead of including source code in our boot
binary, we paste it in Collapse OS' prompt.

Also, adjust RC2014 recipe to include stage 3 assembling instructions
with the "paste into prompt" method.
 2020-04-19 16:28:40 -04:00
Virgil Dupras
a2d89de557 drv/sdc: implement core words in z80 
In addition to making the driver significantly faster, it allows us
to make SDC port configuration opaque to sdc.fs.
 2020-04-18 20:33:51 -04:00
Virgil Dupras
287213fc68 recipes/rc2014/eeprom: remove old stuff 2020-04-17 21:10:20 -04:00
Virgil Dupras
733aff7b7a rc2014: adjust bootstrapping instructions 2020-04-16 09:27:49 -04:00
Virgil Dupras
b536d3bfd6 rc2014: complete the EEPROM recipe 2020-04-13 14:41:02 -04:00
Virgil Dupras
d0545d555f upload: use A! instead of C! 
It makes the tool much more versatile. I'll have adev being included
in all recipes, so it can be assumed.
 2020-04-13 12:00:56 -04:00
Virgil Dupras
d08a9711c5 boot: make HERE point to RAMEND instead of CURRENT 
The former was only used in the peculiar context of "/emul". The
regular case is actually HERE pointing to RAMEND on boot.
 2020-04-13 11:43:15 -04:00
Virgil Dupras
d4f65911c0 rc2014: add notes about stage3.bin 2020-04-12 14:15:06 -04:00
Virgil Dupras
9548514ff0 rc2014: dictionary relinking now works! 2020-04-12 10:24:53 -04:00
Virgil Dupras
bf447f58c5 link: handle doesWord 2020-04-11 16:38:45 -04:00
Virgil Dupras
13cf294201 rc2014/acia: adjust to latest developments 2020-04-11 15:11:36 -04:00
Virgil Dupras
c515720e23 Revert "Remove link.fs" 
Let's revisit the relinking approach, with LITA this time.
This reverts commit 6652125d47.
 2020-04-11 13:31:17 -04:00
Virgil Dupras
6368cc3bac Remove (sysv) 
Replace its usages with direct RAM+ offsets. The (sysv) mechanism was
incompatible with cross-compilation of a full interpreter.
 2020-04-10 14:57:00 -04:00
Virgil Dupras
05c38424c7 recipes/rc2014: stage2 WIP 2020-04-08 09:13:46 -04:00
Virgil Dupras
79527976ab recipes/rc2014: stage2 WIP 2020-04-07 22:36:59 -04:00
Virgil Dupras
6652125d47 Remove link.fs 
This was a dead end.
 2020-04-07 21:23:42 -04:00
Virgil Dupras
521ff84ca4 Reserve some RAM for future features 2020-04-07 17:32:04 -04:00
Virgil Dupras
7390cb18ed rc2014: a little cleanup 2020-04-05 09:29:03 -04:00
Virgil Dupras
58e88119ec rc2014: Forth Collapse OS, fully operational! 2020-04-05 09:09:00 -04:00
Virgil Dupras
e5f22c7d91 rc2014: update README 2020-04-04 18:10:00 -04:00
Virgil Dupras
edb2771488 rc2014: bingo! 
Interpreter is functional in the emulator!
 2020-04-04 17:43:00 -04:00
Virgil Dupras
7b42bbde27 rc2014: aaalmost there... 
Red 5 standing by.
 2020-04-04 17:07:35 -04:00
Virgil Dupras
d1f4dc0ca3 rc2014: aaaalmost there.... 2020-04-04 14:27:23 -04:00
Virgil Dupras
5be9b9cd3e rc2014: we're almost getting there... 2020-04-04 10:31:22 -04:00
Virgil Dupras
c56386af02 wip 2020-04-02 23:21:53 -04:00
Virgil Dupras
97dcad9b15 recipes/sms/kbd: use Collapse OS' AVR assembler 2020-02-26 23:10:43 -05:00
Virgil Dupras
64a54c72f8 Fix broken recipes 2020-02-26 21:44:37 -05:00
Virgil Dupras
92ddc7ebc1 recipes/trs80: use grid module 
Not much of a gain in terms of usability (a bit of a loss in fact, things are
a bit slow and glitchy), but it's a necessary move if we want to use upcoming
grid-enabled userspace apps, such as a visual text editor.
 2020-02-26 16:27:27 -05:00
Virgil Dupras
247b200dcc New kernel module: grid 2020-02-24 20:36:08 -05:00
Virgil Dupras
434c8d5c0d recipes/trs80: add ed 2020-02-23 20:52:44 -05:00
Virgil Dupras
c3213e1e8c recipes/trs80: can now run zasm! 2020-02-23 14:51:19 -05:00
Virgil Dupras
2860a10f71 recipes/trs80: add CFS support 2020-02-22 20:06:59 -05:00
Virgil Dupras
ec6df3087d recipes/trs80: add "recv" command 
This allows us to write contents from RS-232 directly to floppy! it works!
 2020-02-22 14:43:07 -05:00
Virgil Dupras
049f2cf222 Reverse ttysafe escaping order 
Sending the escape after its target made things complicated for upcoming
stuff I want to add. Although it makes `recv.asm` slightly larger, it's really
worth it.
 2020-02-22 14:11:43 -05:00
Virgil Dupras
69f0c6dafd trs80/floppy: implement write 2020-02-22 12:09:43 -05:00
Virgil Dupras
438c71ad3d trs80/floppy: new module 
Read-only support for now, hardcoded on drive :1. But it seems to work.

Can't wait to get a CFS running on this!
 2020-02-21 19:30:57 -05:00
Virgil Dupras
bd38d46892 recipes/trs80: fix double line feeds 
Lines should be terminated only with a CR on this system, not CRLF.
 2020-02-21 08:40:42 -05:00
Virgil Dupras
9515d63d47 recipes/trs80: Collapse OS runs on the TRS-80 Model 4P! 2020-02-12 11:23:49 -05:00
Virgil Dupras
bab18216aa recipes/trs80: add instructions to save recv program to floppy 2020-02-10 11:25:05 -05:00
Virgil Dupras
a74ee81822 recipes/trs80: new recipe (WIP) 2020-01-11 23:01:28 -05:00
Virgil Dupras
fb2117dc2e sms/vdp: use fonts from kernel/fnt 
Instead of its own version of one. Additionally, add a 7x7 font to
the collection.
 2020-01-07 22:15:35 -05:00
Virgil Dupras
c7ef8bf915 recipes: add "make emul" targets where appropriate 2020-01-02 16:59:38 -05:00
Virgil Dupras
9216057db8 emul/hw: add TI-84+ emulator 
I implement the screen using XCB which is much more friendly
than z80e's SDL+CMake for development machines that want to install
minimal dependencies (for example, a port-less OpenBSD rig).
 2020-01-01 22:48:01 -05:00
Virgil Dupras
097c677641 emul/zasm: use libcfs 
This allows us to get rid of the zasm.sh wrapper.
 2019-12-31 15:07:39 -05:00
Virgil Dupras
dcb96aefe9 lib/parse: remove parseHexPair 
Also, make parseHexadecimal "tail" (HL). Soon, all routines in lib/parse
will do that, making the life of lib/expr easier.
 2019-12-29 21:56:56 -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
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
880775ae69 recipes/rc2014/sdcard: use BASIC shell 2019-12-11 11:18:32 -05:00
Virgil Dupras
fb93fcd6e6 recipes/rc2014/eeprom: add usr.asm 
A little life saver if your target shell doesn't have a proper at28w.
 2019-12-09 21:03:31 -05:00
Virgil Dupras
b9292eb8d0 recipes/rc2014/ps2: Use BASIC shell 2019-12-06 20:00:29 -05:00
Virgil Dupras
08392fee60 recipes/rc2014/eeprom: use BASIC shell 2019-12-02 23:00:35 -05:00
Virgil Dupras
0fb7995166 recipes/sms/romasm: add missing sentinel in .mycmds 2019-12-02 23:00:03 -05:00
Virgil Dupras
270ad926c9 recipes/sms: use BASIC shell 2019-12-02 20:18:41 -05:00
Virgil Dupras
15e44ec524 doc: add TI83+/TI84+ doc page 2019-12-02 13:51:36 -05:00
Virgil Dupras
10864afa96 recipes/ti84: use the BASIC shell 2019-12-01 20:11:13 -05:00
Virgil Dupras
aad8efeff7 recipes/rc2014/basic: new recipe 2019-11-23 21:22:31 -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
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
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
39f3637c60 recipes/ti84: TI-84+ base recipe is complete! 
ref #41
 2019-11-12 20:32:56 -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
a4190f9984 recipes/ti84: document usage 
ref #41
 2019-11-09 14:20:01 -05:00
Virgil Dupras
c896b77143 ti/kbd: implement A-Lock 
ref #41
 2019-11-08 20:27:43 -05:00
Virgil Dupras
dca6ce4e8e ti/kbd: begin GetC implementation 
For now, only digits are scanned. Lifted from my "tiseg7" example.

ref #41
 2019-11-08 14:04:56 -05:00
Virgil Dupras
fda9c9826e ti/lcd: add linefeed support 
There's no scrolling yet...

ref #41
 2019-11-07 20:53:15 -05:00
Virgil Dupras
f4871d4d58 recipes/ti84: add upload instructions 
ref #41
 2019-11-07 13:42:40 -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
69daf49920 doc: fix mis-wording 2019-11-05 17:59:29 -05:00
Virgil Dupras
9344c4b961 doc: minor improvements 2019-11-04 14:45:10 -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
16bf8e28c0 Remove SHELL_LOOPHOOK 
It was a bad idea and having sms/pad interact directly with sms/vdp
is much simpler.

ref #64
 2019-11-03 19:13:01 -05:00
Virgil Dupras
20c0ba3dd0 Clarify recipes structure 
Drop the "{pre,post}-collapse" thing and specify that the rc2014 recipes
are canonical.
 2019-11-03 16:09:11 -05:00
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
luz.paz
6a635fddd9 Fix misc. source comment typos 
Found via `codespell -q 3 -S ./tools -L splitted`
 2019-10-09 11:12:08 -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
c839703682 recipes/sms/romasm: ed and zasm, fully functional! 2019-07-25 14:24:18 -04:00
Virgil Dupras
13028d431e recipes/sms/romasm: limit mmap size 
Otherwise, we overflow into the RAM mirror, which means we
overwrite the beginning of the RAM.
 2019-07-23 23:01:17 -04:00
Virgil Dupras
1c6a7caeae recipes/sms/romasm: make zasm's memory usage fit the SMS 2019-07-23 16:50:19 -04:00
Virgil Dupras
af0b6231ca recipes/sms/romasm: make ed's memory usage fit the SMS 
Yup, that's ultimately why I've just made this whole big zasm
refactoring in the previous commits. To allow for this.

But also, zasm is in much better shape now...
 2019-07-23 16:13:52 -04:00
Virgil Dupras
ffa28195b1 recipes/sms/romasm: adjust glue to zasm changes 
Forward reference of SHELL_MEM_PTR wasn't working (nor should it
have been...).
 2019-07-23 15:42:52 -04:00
Virgil Dupras
87d794d426 recipes/sms/romasm: adjust ed/zasm offsets 2019-07-22 10:11:59 -04:00
Virgil Dupras
77d805ea0f shell: allow cmds to be shorter than 4 chars 2019-07-21 15:57:55 -04:00
Virgil Dupras
70a42e8c4d recipes/sms/romasm: first steps 2019-07-21 15:37:03 -04:00
Virgil Dupras
0c0db41477 recipes/sms/kbd: add schematic 2019-07-20 14:51:34 -04:00
Virgil Dupras
57e7b3ca05 recipes/sms/kbd: PS/2 keyboard adapter for the SMS! 2019-07-20 12:42:55 -04:00
Virgil Dupras
8cc5bbb110 recipes/sms: update README 2019-07-02 16:31:58 -04:00
Virgil Dupras
dd84c11905 recipes/sms: Add pad-oriented character selection 2019-07-02 13:15:24 -04:00
Virgil Dupras
bd003829e8 recipes/sms: plug shell in! 
Now this is getting eminently exciting!
 2019-07-02 11:14:30 -04:00
Virgil Dupras
767db17252 recipes/sms: hitting a button now adds a char on the screen 2019-07-02 10:49:30 -04:00
Virgil Dupras
9eb80d5eac sms/pad: new module to manage Megadrive controller in SMS 2019-07-02 09:02:19 -04:00
Virgil Dupras
ca5bc07a75 recipes/sms: show all letters in font when Start is pressed 2019-07-01 16:15:46 -04:00
Virgil Dupras
ba2804a255 recipes/sms: add controller support 2019-07-01 15:46:10 -04:00
Virgil Dupras
95fa473641 recipes/sms: New section for Sega Master System 2019-07-01 11:05:25 -04:00
Virgil Dupras
2efe887434 recipes/rc2014/ps2: add schema 2019-06-30 17:37:18 -04:00
Virgil Dupras
e3eea8839b recipes/rc2014/ps2: works rather well now! 2019-06-30 14:16:00 -04:00
Virgil Dupras
2c6ab08d51 recipes/rc2014/ps2: add "resend" requests on parity check failures 2019-06-30 11:17:12 -04:00
Virgil Dupras
0f82ebe02d recipes/rc2014/ps2: add parity checks 
Also, add timer to reset reception status after 100us.
 2019-06-29 20:45:08 -04:00
Virgil Dupras
360446e731 recipes/rc2014/ps2: don't alter SREG in hdlPCINT 2019-06-29 15:47:02 -04:00
Virgil Dupras
e44ebb08b2 recipes/rc2014/ps2: drive a shell with ps/2 kbd! 2019-06-29 14:26:03 -04:00
Virgil Dupras
3cdb25bfda recipes/rc2014/ps2: implement scan code buffer 2019-06-29 11:18:37 -04:00
Virgil Dupras
20a7ad231f recipes/rc2014/pc2: new recipe (WIP) 2019-06-28 22:54:57 -04:00
Virgil Dupras
6df77ddef3 recipes/rc2014/zasm: we can now assemble the recipe's kernel 2019-06-18 22:07:44 -04:00
Virgil Dupras
0a36ea0815 recipes/rc2014/zasm: add unpack + verification 2019-06-17 15:35:14 -04:00
Virgil Dupras
95b658897a recipes/rc2014/zasm: add instructions to assemble kernel 2019-06-17 14:19:49 -04:00
Virgil Dupras
3e437747c2 recipes/rc2014: add missing calls to fsInit 
Also, tighten RAM addresses. They were unecessarily loose.
 2019-06-17 13:46:33 -04:00
Virgil Dupras
92a04f4627 sdc: support 24-bit addressing 
Needed if we want to compile the kernel and zasm from within a SD card.
I didn't go straight for 32-bit because it was significantly more
complex and 24-bit give us 16M. Enough to go on for a while...
 2019-06-15 13:41:20 -04:00
Virgil Dupras
e7c07cdd9a apps/at28w: fix argument byte order 2019-06-14 21:11:45 -04:00
Virgil Dupras
c613f7b0ee recipes/rc2014/eeprom: fix broken a28w args passing 
That's why the command seemed slow! It's much faster than I thought.
 2019-06-14 16:30:01 -04:00
Virgil Dupras
817636242a Add at28w app and recipe 
This allows us to write to an AT28 EEPROM from within collapse os.
 2019-06-14 14:15:30 -04:00