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380 Commits

Author SHA1 Message Date
Virgil Dupras
289037a3dd lib/parse: make parseDecimal "tail" HL 
HL, instead of being preserved, is set to the character following
the last read character.
 2019-12-30 10:13:55 -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
2503bdfced lib/args: remove 2019-12-29 21:05:09 -05:00
Virgil Dupras
5f2615a134 at28w: don't use lib/args 2019-12-29 21:02:04 -05:00
Virgil Dupras
346bcc3d3d zasm: don't use lib/args 
This unit is being removed.
 2019-12-29 20:56:13 -05:00
Virgil Dupras
d0f031939f lib/parse: make parseLiteral a little tighter 
Sub-parsers are seldom used by themselves, except for parseDecimal.
I'm tightening the code of this unit for two reasons:

1. Optimization
2. Upcoming API change where HL won't be preserved anymore, but will
   point to char following the last parse char. This will allow us
   to simplify lib/expr.
 2019-12-29 19:47:19 -05:00
Virgil Dupras
15628da7de lib/expr: make EXPR_PARSE put result in DE instead of IX 
Finally getting rid of this bad mistake of using IX for this.
 2019-12-29 17:37:04 -05:00
Virgil Dupras
981c93bfd4 lib/expr: fix stack imbalance on failure 2019-12-29 16:15:48 -05:00
Virgil Dupras
213614af33 lib/expr: make recursion process a bit more orderly 
Instead of going left and right, finding operators chars and replacing them
with nulls, we parse expressions in a more orderly manner, one chunk at a
time. I think it qualifies as "recursive descent", but I'm not sure.

This allows us to preserve the string we parse and should also make the
implementation of parens much easier.
 2019-12-29 11:42:18 -05:00
Virgil Dupras
7410891ad1 lib/expr: fix unary minus 
For some reason, I've mistakenly disabled tests in test_expr without noticing
and I also broke "-123" parsing. Fixed.
 2019-12-23 20:53:31 -05:00
Virgil Dupras
6d88c3a754 parseExprDE --> parseExpr 2019-12-23 19:13:44 -05:00
Virgil Dupras
5301200d6f basic: parseExpr --> parseExprDE 2019-12-23 19:01:03 -05:00
Virgil Dupras
476178ee7c zasm: parseExpr --> parseExprDE 2019-12-23 18:44:55 -05:00
Virgil Dupras
cc754e12aa parseExpr --> parseExprDE: easy ones 
Those replacements were trivially equivalent. For the other ones, an
examination of the context is necessary.
 2019-12-23 15:59:55 -05:00
Virgil Dupras
a034f63e23 test: begin adding common test harnessing code 
This should make tests a bit more convenient to write and debug.

Moreover, begin de de-IX-ization of parseExpr. I have, in a local WIP, a
parseExpr implemented using a recursive descent algo, it passes all tests, but
it unfortunately assembles a faulty zasm. I have to find the expressions that
it doesn't parse properly.

But before I do that, I prefer to commit these significant improvements I've
been making to tests harness in parallel of this development.
 2019-12-23 15:41:25 -05:00
Virgil Dupras
98ca338aba avra: add LD/ST 2019-12-22 21:50:20 -05:00
Virgil Dupras
51e500e8da avra: avoid pgm addr truncation error on first pass 2019-12-22 19:44:46 -05:00
Virgil Dupras
b955a67daa avra: add TST 2019-12-22 19:24:36 -05:00
Virgil Dupras
6e1e8e0e59 avra: add LSL 2019-12-22 18:36:15 -05:00
Virgil Dupras
8ded02bc78 avra: fix misordered MOV, MUL, NEG and NOP 2019-12-22 18:35:08 -05:00
Virgil Dupras
f54e10f9fd avra: add CALL and JMP 2019-12-22 15:54:46 -05:00
Virgil Dupras
10b925e0e0 avra: add BCLR and BSET 2019-12-22 15:11:15 -05:00
Virgil Dupras
1771ee8da7 avra: add SER 2019-12-22 15:01:08 -05:00
Virgil Dupras
0a9ac27cf6 avra: add SBIC and SBIS 2019-12-22 14:55:38 -05:00
Virgil Dupras
a9dcba5793 avra: add CBR instruction 2019-12-22 14:45:10 -05:00
Virgil Dupras
c968995ec0 avra: add CBI and SBI 
This completes instruction support for the Blink tn45 example.
 2019-12-15 20:51:31 -05:00
Virgil Dupras
5c43988649 avra: code consolidation 2019-12-15 20:15:44 -05:00
Virgil Dupras
b130cac635 avra: code consolidation 2019-12-15 19:17:03 -05:00
Virgil Dupras
52359a4e42 avra: a little code deduplication 2019-12-15 18:52:00 -05:00
Virgil Dupras
e9c692ed50 avra: a litte bit of code deduplication 2019-12-15 18:34:14 -05:00
Virgil Dupras
2652c81519 avra: make CLR work properly 2019-12-15 16:43:32 -05:00
Virgil Dupras
20861767e6 avra: generalize arg swapping behavior 2019-12-15 16:36:43 -05:00
Virgil Dupras
14fbfa2967 avra: small _parseArgs refactoring 
Take argspec pairs directly as an argument instead of taking a
pointer to an argspec pair.
 2019-12-15 16:25:16 -05:00
Virgil Dupras
62eb5589c3 avra: refactor instruction tbl 
The instruction table is now beefier and has redundant data, but
this simplifies processing. This should simplify upcoming work.
 2019-12-15 15:53:28 -05:00
Virgil Dupras
aa8df95f7d Add "avr/" includes folder 
Also, add a "real world" example in AVRA tests, a blink program on
a ATtiny45. Some instructions are commented out because they aren't
implemented yet, but not many.

The output of the program has been verified against AVRA's own
output.
 2019-12-15 09:38:01 -05:00
Virgil Dupras
64935d8b40 avra: add IN and OUT instructions 2019-12-15 08:43:59 -05:00
Virgil Dupras
ab578159b7 avra: refactor args parsing 
This costs us a bit of space for now but should make things a lot
simpler down the road, especially with "alias ops" which are simple
syntactic sugar for another op.
 2019-12-14 15:17:55 -05:00
Virgil Dupras
fa75f30ffb avra: add RJMP and RCALL instructions 2019-12-14 12:28:27 -05:00
Virgil Dupras
33c480a5dd avra: remove useless instrBRBits table 
I had written this when trying different approaches to adding BR and
I forgot to remove it.
 2019-12-14 09:41:36 -05:00
Virgil Dupras
a5efc695e9 avra: add "Rd + bit" instructions 2019-12-14 09:33:46 -05:00
Virgil Dupras
c696fcbce4 avra: add "with immediate" instructions 2019-12-14 09:05:38 -05:00
Virgil Dupras
4b9712a224 avra: add branching instructions 2019-12-13 22:49:15 -05:00
Virgil Dupras
57c1a10434 avra: first steps 2019-12-13 17:38:40 -05:00
Virgil Dupras
e691dab070 zasm: little drive-by optimization 
Use IX directly for argspec rows instead of going through DE. It saves a bit
of processing. The code was this way because I initially didn't use IX at all,
so as code evolved, that DE translation stayed as an artifact.
 2019-12-13 10:54:01 -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
43f4c5200e basic: don't choke on ':' in '"' literals 2019-12-12 12:22:38 -05:00
Virgil Dupras
3db38b0d89 basic: add while command 2019-12-12 11:17:10 -05:00
Virgil Dupras
51c977f2ed basic: allow multiple commands on the same line 2019-12-12 10:51:13 -05:00
Virgil Dupras
1710c865dc doc: refer to the new BASIC shell in example 
ref #80
 2019-12-11 14:57:07 -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
beaea6f978 basic: add puth command 2019-12-09 14:34:14 -05:00
Virgil Dupras
105acedab8 basic: improve README 
markdown formatting was broken. Also, don't mark it as WIP.
 2019-12-01 20:15:45 -05:00
Virgil Dupras
10864afa96 recipes/ti84: use the BASIC shell 2019-12-01 20:11:13 -05:00
Virgil Dupras
4c07639808 basic: make cmd table more compact 
This shaves off quite a few bytes from the binary.
 2019-11-30 21:36:34 -05:00
Virgil Dupras
4ba84dac5c basic: add getc/putc commands 2019-11-30 21:13:44 -05:00
Virgil Dupras
77485a0031 basic: change welcome prompt 
This is becoming the new shell, it has to step up to its new responsibilities!
 2019-11-30 20:50:34 -05:00
Virgil Dupras
fc23a7c4a1 basic: do registers-to-vars transfer after pgm hook call 2019-11-25 23:16:15 -05:00
Virgil Dupras
264e72e0fd basic: add fnew and fdel commands 2019-11-25 22:49:24 -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
b29073b01d basic: add fopen command 2019-11-25 21:41:37 -05:00
Virgil Dupras
a0daed6812 basic: add usr command 2019-11-24 21:07:03 -05:00
Virgil Dupras
12bc120375 basic: add bsel, bseek, getb, putb commands 2019-11-24 20:34:23 -05:00
Virgil Dupras
8f1d942e5f basic: add addr command 2019-11-24 15:39:36 -05:00
Virgil Dupras
381d57a513 basic: make variable A the only input variable 
Mechanism for assigning inputs to the specified variable is clumsy and uses
binary space. Always using A is much simpler and doesn't seem very limiting to
me. I do that because there's many more "input" commands I'd like to add.
 2019-11-24 14:55:50 -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
b7d4860acf basic: add in/out commands 
Also, fixed the cmd matching algo to not accept partial matches. For example,
to stop matching "input" when the command was "in".
 2019-11-23 20:38:56 -05:00
Virgil Dupras
7761cebb0a basic: add sleep command 
also fix broken "peek"
 2019-11-23 17:07:14 -05:00
Virgil Dupras
9602f9b983 basic: add peek/poke/deek/doke commands 2019-11-23 16:09:34 -05:00
Virgil Dupras
a680fd3328 basic: add support for signed integers 2019-11-23 14:56:23 -05:00
Virgil Dupras
501fe96e07 lib/expr: use the IX register a bit less 
It's an awkward register to use and avoiding its use allows us to strip the
resulting binary significantly. parseEXPR keeps the same signature though.
 2019-11-22 19:56:08 -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
fd5b2ab856 Put app-common documentation in apps/README.md 2019-11-22 14:01:16 -05:00
Virgil Dupras
e17dc1e1e1 basic: add input command 2019-11-21 20:17:55 -05:00
Virgil Dupras
982d20f895 basic: allow printing of quoted strings 2019-11-21 19:56:51 -05:00
Virgil Dupras
704d32279a basic: document better 2019-11-21 17:03:46 -05:00
Virgil Dupras
7262993f14 basic: add if 2019-11-21 16:06:14 -05:00
Virgil Dupras
3f3dd9141e basic: allow multiple args in print 2019-11-20 21:02:11 -05:00
Virgil Dupras
9c400ca642 basic: add goto 
Things are getting super cereal...
 2019-11-20 15:45:53 -05:00
Virgil Dupras
9d6cbe577c basic: add variables 
Things are getting cereal...
 2019-11-20 15:10:00 -05:00
Virgil Dupras
9c9484fb88 basic: add run command 2019-11-20 10:49:23 -05:00
Virgil Dupras
9d1003e7a2 basic: keep line index ordered and line numbers unique 2019-11-19 21:55:26 -05:00
Virgil Dupras
62138b12cf basic: add buffer line index 2019-11-19 20:43:01 -05:00
Virgil Dupras
4c6de413df basic: begin implementing a line buffer 2019-11-19 15:14:04 -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
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
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