Commit Graph

134 Commits

Author SHA1 Message Date
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
d70c6d3b5f sms/vdp: improve comments 2020-01-08 18:38:55 -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
0d7693a163 core: remove writeHLinDE
It wasn't used much so I inlined it.
2019-12-13 09:56:23 -05:00
Virgil Dupras
4f7a05e3b7 core: remove cpHLDE
It wasn't used much, so I replaced its use in the kernel with direct code
and moved the routine in apps/ed, the only other place where it was used.
2019-12-12 15:53:14 -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
880775ae69 recipes/rc2014/sdcard: use BASIC shell 2019-12-11 11:18:32 -05:00
Virgil Dupras
5e0a548faa kbd: squeeze out a few bytes 2019-12-06 22:45:39 -05:00
Virgil Dupras
3a68807cd4 kbd: make kbdGetC blocking
I forgot to update this when changing stdio GetC API.
2019-12-06 19:59:46 -05:00
Virgil Dupras
817088f794 fs: fix broken "ensure Z" in fsIter 2019-11-25 22:32:55 -05:00
Virgil Dupras
7262993f14 basic: add if 2019-11-21 16:06:14 -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
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
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
30d6fdb16b ti/lcd: use brand new support for IX in SRL and RR 2019-11-10 22:07:44 -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
6d9f96aee6 ti/lcd: add support for backspace
Also, fix visual glitch on line wrap.
2019-11-09 14:37:52 -05:00
Virgil Dupras
a4190f9984 recipes/ti84: document usage
ref #41
2019-11-09 14:20:01 -05:00
Virgil Dupras
2026113480 ti/kbd: lowercase letters by default, 2nd to upcase 2019-11-09 13:38:35 -05:00
Virgil Dupras
9c37471780 ti/kbd: improve debouncing
Previously, on real hardware (emulator behaved fine), we would routinely
get repeat keys unless pressing the button very fast. This commit solves that.
2019-11-09 13:22:01 -05:00
Virgil Dupras
418af5f626 ti/kbd: make Alpha and 2nd toggle
Previously, when being in A-Lock mode, activating Alpha wouldn't make
us go temporarily in digit mode, as is expected.
2019-11-09 13:12:36 -05:00
Virgil Dupras
67f689260f ti/lcd: Add scrolling through z-offset 2019-11-09 08:25:10 -05:00
Virgil Dupras
6a70a0e5e6 ti/lcd: wrap rows on overflow 2019-11-09 08:09:01 -05:00
Virgil Dupras
b27a71cb88 ti/kbd: fix space character 2019-11-09 08:01:03 -05:00
Virgil Dupras
6c1b1f2b79 ti/lcd: wrap to next line when overflowing 2019-11-08 22:55:56 -05:00
Virgil Dupras
bb2e528b65 ti/lcd: clear screen on init
LCD RAM persists between reboots, makingit necessary to clear it.

ref #41
2019-11-08 21:54:03 -05:00
Virgil Dupras
c896b77143 ti/kbd: implement A-Lock
ref #41
2019-11-08 20:27:43 -05:00
Virgil Dupras
8d5c26f299 ti/kbd: add alpha support
no a-lock or lowercase yet.

ref #41
2019-11-08 15:45:45 -05:00
Virgil Dupras
ca8b315e9d ti/kbd: widen char detection
no alpha yet.

ref #41
2019-11-08 14:58:29 -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
6a4bddc493 ti/lcd: ensure that variables are initialized 2019-11-08 11:45:37 -05:00
Virgil Dupras
c57f2d6973 fonts/5x7: add lowercase letters 2019-11-07 22:27:12 -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
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
3ef964e74d acia: make GetC blocking 2019-11-04 14:44:43 -05:00
Virgil Dupras
41338a4b23 stdio: add "Accepted characters" comment section
ref #64
2019-11-04 10:12:17 -05:00
Virgil Dupras
27149338e4 stdio: fix typo 2019-11-04 10:04:09 -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
2a513e6f57 stdio: make stdioGetC and stdioReadline blocking
ref #64.

Also, fix a bug in the shell where it would write outside the buffer's
bounds when given a completely filled buffer without a space character
in it.
2019-11-03 20:32:27 -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
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
Clanmaster21
38333e9e07 Decimal parse optimisations (#45)
* Optimised parsing functions and other minor optimisations

UnsetZ has been reduced by a byte, and between 17 and 28 cycles saved based on branching. Since branching is based on a being 0, it shouldn't have to branch very often and so be 28 cycles saved most the time. Including the initial call, the old version was 60 cycles, so this should be nearly twice as fast. 
fmtHex has been reduced by 4 bytes and between 3 and 8 cycles based on branching.
fmtHexPair had a redundant "and" removed, saving two bytes and seven cycles.
parseHex has been reduced by 7 bytes. Due to so much branching, it's hard to say if it's faster, but it should be since it's fewer operations and now conditional returns are used which are a cycle faster than conditional jumps. I think there's more to improve here, but I haven't come up with anything yet.

* Major parsing optimisations

Totally reworked both parseDecimal and parseDecimalDigit
parseDecimalDigit no longer exists, as it could be replaced by an inline alternative in the 4 places it appeared. This saves one byte overall, as the inline version is 4 bytes, 1 byte more than a call, and removing the function saved 5 bytes. It has been reduced from between 52 and 35 cycles (35 on error, so we'd expect 52 cycles to be more common unless someone's really bad at programming) to 14 cycles, so 2-3 times faster.
parseDecimal has been reduced by a byte, and now the main loop is just about twice as fast, but with increased overhead. To put this into perspective, if we ignore error cases:
For decimals of length 1 it'll be 1.20x faster, for decimals of length 2, 1.41x faster, for length 3, 1.51x faster, for length 4, 1.57x faster, and for length 5 and above, at least 1.48x faster (even faster if there's leading zeroes or not the worst case scenario).
I believe there is still room for improvement, since the first iteration can be nearly replaced with "ld l, c" since 0*10=0, but when I tried this I could either add a zero check into the main loop, adding around 40 cycles and 10 bytes, or add 20 bytes to the overhead, and I don't think either of those options are worth it.

* Inlined parseDecimalDigit

See previous commit, and /lib/parse.asm, for details

* Fixed tabs and spacing

* Fixed tabs and spacing

* Better explanation and layout

* Corrected error in comments, and a new parseHex

5 bytes saved in parseHex, again hard to say what that does to speed, the shortest possible speed is probably a little slower but I think non-error cases should be around 9 cycles faster for decimal and 18 cycles faster for hex as there's now only two conditional returns and no compliment carries.

* Fixed the new parseHex

I accidentally did `add 0xe9` without specifying `a`

* Commented the use of daa

I made the comments surrounding my use of daa much clearer, so it isn't quite so mystical what's being done here.

* Removed skip leading zeroes, added skip first multiply

Now instead of skipping leading zeroes, the first digit is loaded directly into hl without first multiplying by 10. This means the first loop is skipped in the overhead, making the method 2-3 times faster overall, and is now faster for the more common fewer digit cases too. The number of bytes is exactly the same, and the inner loop is slightly faster too thanks to no longer needing to load a into c.
To be more precise about the speed increase over the current code, for decimals of length 1 it'll be 3.18x faster, for decimals of length 2, 2.50x faster, for length 3, 2.31x faster, for length 4, 2.22x faster, and for length 5 and above, at least 2.03x faster. In terms of cycles, this is around 100+(132*length) cycles saved per decimal.

* Fixed erroring out for all number >0x1999

I fixed the errors for numbers >0x1999, sadly it is now 6 bytes bigger, so 5 bytes larger than the original, but the speed increases should still hold.

* Fixed more errors, clearer choice of constants

* Clearer choice of constants

* Moved and indented comment about fmtHex's method

* Marked inlined parseDecimalDigit uses

* Renamed .error, removed trailing whitespace, more verbose comments.
2019-10-24 07:58:32 -04:00
Clanmaster21
cca3157c66 addHL and subHL affect flags, and are smaller (#30)
* addHL and subHL affect flags, and are smaller

Most importantly, addHL and subHL now affect the flags as you would expect from a 16 bit addition/subtraction. This seems like it'd be preferred behaviour, however I realise any code relying on it not affecting flags would break. One byte saved in addHL, and two bytes saved in subHL. Due to the branching nature of the original code, it's difficult to compare speeds, subHL is either 1 or 6 cycles faster depending on branching, and addHL is between -1 and 3 cycles faster. If the chance of a carry is 50%, addHL is expected to be a cycle faster, but for a chance of carry below 25% (so a < 0x40) this will be up to a cycle slower.

* Update core.asm

* Reworked one use of addHL

By essentially inlining both addHL and cpHLDE, 100 cycles are saved, but due to the registers not needing preserving, a byte is saved too.

* Corrected spelling error in comment

* Reworked second use of addHL

43 cycles saved, and no more addHL in critical loops. No bytes saved or used.

* Fixed tabs and spacing, and made a comment clearer.

* Clearer comments

* Adopted push/pop notation
2019-10-17 16:45:27 -04:00
Clanmaster21
9fb1467ee5 cpHLDE and writeHLinDE improvements (#33)
Pretty major improvements to both of these, cpHLDE is now 5 bytes shorter and between 9 and 12 cycles faster due to branching, and writeHLinDE is now 2 bytes shorter and 21 cycles faster.
2019-10-16 20:39:38 -04:00
Clanmaster21
6281e2036f Optimised intoXX functions (#19)
* Optimised intoXX functions

Rewrote intoXX functions to mainly rely on intoHL, as the HL instructions are smaller and faster. Also removed some redundant push and pop instructions. I edited the given unit tests to test these, and they seem to work as expected.

* Doesn't use self-modifying code

The number of bytes is the same as my previous attempt, with 11 more cycles in intoHL, so although I don't feel as clever this time it's still a good optimisation. I found an equivalent method for intoDE, however relying on intoHL still allows for  `ex (sp), hl` to be used in intoIX, which is smaller and faster.

* Update core.asm

* Tried harder to follow coding convention

Added tabs between mnemonics and operands, and replaced a new line I accidentally removed.
2019-10-10 14:44:23 -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