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collapseos
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962 Commits

Author SHA1 Message Date
Virgil Dupras f420db135d forth: a little house cleaning 2020-03-19 16:36:54 -04:00
Virgil Dupras af5a97243a forth: implement "0b" number parsing 2020-03-19 16:03:35 -04:00
Virgil Dupras f0cbda1f2e tests: add Forth tests 
Modest first step
 2020-03-19 15:43:48 -04:00
Virgil Dupras b335e538b4 Move "forth" folder to project's root folder 
It's not really an App.
 2020-03-18 22:25:44 -04:00
Virgil Dupras ae6334906c forth: inline kernel's core and str units 2020-03-18 22:18:07 -04:00
Virgil Dupras 548facac0b forth: Implement "(parseh)" 2020-03-18 21:52:55 -04:00
Virgil Dupras d874f20278 forth: Add "DO" and "LOOP" 
Also, un-IMMEDIATE "LITN" it didn't make any sense.
 2020-03-18 20:04:44 -04:00
Virgil Dupras 587d1d0d69 forth: add word "UNTIL" 2020-03-18 16:39:22 -04:00
Virgil Dupras 1df9c4fc1b forth: split forth source into multiple files 2020-03-17 21:44:32 -04:00
Virgil Dupras 9451c599e0 forth: Make (parse) indirect and Forth-ify (parsec) 2020-03-17 21:19:56 -04:00
Virgil Dupras 4212d5161f forth: Word-ify number parsing 2020-03-17 17:46:58 -04:00
Virgil Dupras 707f1dbae1 forth: Word-ify "[COMPILE]" 2020-03-17 17:29:03 -04:00
Virgil Dupras b72901175e forth: Word-ify "[']" and "'" 2020-03-17 16:17:51 -04:00
Virgil Dupras d91af99fde forth: make "'" push 0 when not finding a word 2020-03-17 15:54:17 -04:00
Virgil Dupras 3a70dff53d forth: add word 'ABORT"' 2020-03-17 15:31:15 -04:00
Virgil Dupras 25b6e75cf7 forth: add words "."" and "(print)" 2020-03-17 15:22:13 -04:00
Virgil Dupras a40926d710 forth: check PS everywhere 
It turns out we have to...
 2020-03-17 14:56:08 -04:00
Virgil Dupras 6314c60ede forth: add word ".X" 2020-03-17 14:05:53 -04:00
Virgil Dupras 549cf74e9d forth: inline code from "apps/lib" 
Forth-ification of Collapse OS goes forward. What will happen is that assembly
code in apps/ will become Forth code. The concept of an assembler code library
will become obsolete.

However, Forth's core use some of that code. To facilitate the transition, I'm
inlining that code directly in Forth's code.
 2020-03-17 12:49:06 -04:00
Virgil Dupras 017a469d9c forth: Forth-ify "." 2020-03-17 12:26:28 -04:00
Virgil Dupras 839d7097e7 forth: add words "MOD" and "/MOD" 2020-03-16 22:36:29 -04:00
Virgil Dupras 5d5517ac44 forth: allow DEFINE's ";" to be at the start of a newline 
Previous to this commit, DEFINE's algo would miss a ";" right after a newline.

This allows for a much nicer formatting+comment of core.fs.
 2020-03-16 22:09:23 -04:00
Virgil Dupras aec98a7a3a forth: separate COMPILE and [COMPILE] 2020-03-16 21:31:43 -04:00
Virgil Dupras f404c2f4d0 forth: TIL forth source file extension is "fs" 2020-03-16 19:51:10 -04:00
Virgil Dupras 80ab395823 forth: Simplify execution model 
Change the mainloop so that words are executed immediately after they're read.
This greatly simplifies execution model and allow the "DEFINE" word to become
an IMMEDIATE and stop its "copy from compiled words" scheme.

The downside to this is that flow control words no longer work when being used
directly in the input buffer. They only work as part of a definition.

It also broke "RECURSE", but I've replaced it with "BEGIN" and "AGAIN".

Another effect of this change is that definitions can now span multiple lines.

All in all, it feels good to get rid of that COMPBUF...
 2020-03-15 22:46:17 -04:00
Virgil Dupras 7befe56597 forth: improve input flow 
Readline, instead of being triggered by the end of execution of the last
compiled line is now triggered "just in time", by "WORD".

This allows IMMEDIATE words reading input buffer to span multiple lines
( comments for example, but colon definitions will soon follow ).
 2020-03-14 19:10:39 -04:00
Virgil Dupras e1f815baeb forth: Forth-ify main loop a bit 
Add words "COMPILE" and "DROP". The goal is to soon make "DEFINE" immediate
and have it compile from input directly. This whole "main loop compiles
everything and DEFINE picks up compiled atoms" is a bit messy.
 2020-03-14 17:48:24 -04:00
Virgil Dupras 764b2222c7 forth: replace (fbr?) by SKIP? 
This will allow us to support backward branching with just one new (bbr) word.
Also, this allow us to have "(" word sooned in core.fth and thus allow for
earlier commenting.
 2020-03-14 09:23:58 -04:00
Virgil Dupras 94166186eb forth: fix DOES> bad exec offset 2020-03-13 21:27:19 -04:00
Virgil Dupras 5b1ca474d4 forth: Add word "(" 
Also, fix "RECURSE" in IMMEDIATE contexts.
 2020-03-13 19:33:16 -04:00
Virgil Dupras d60ea4cb30 forth: Forth-ify RECURSE 
This comes with RS-modifying words. Also, this commit separates ";" from "EXIT",
allowing EXIT to be used in definitions (was needed for RECURSE).
 2020-03-13 16:40:55 -04:00
Virgil Dupras c3838714d5 forth: improve execution model 
My approach with RS was slightly wrong: RS' TOP was always containing current
IP. It worked, but it was problematic when came the time to introduce
RS-modifying words: it's impossible to modify RS in a word without immediately
messing your flow.

Therefore, what used to be RS' TOS has to be a variable that isn't changed
midway by RS-modifying words. I guess that's why RS is called *return* stack...
 2020-03-13 16:01:09 -04:00
Virgil Dupras d0d92a4559 forth: Forth-ify IF and ELSE 
Now, I really need comments...
 2020-03-12 21:49:10 -04:00
Virgil Dupras d5a7d5faf8 forth: add words "(fbr)", "(fbr?)", "'", "[']" 2020-03-12 21:16:20 -04:00
Virgil Dupras fb54fd51af forth: implement THEN in Forth 
Also, add "," and "C,"
 2020-03-12 13:52:27 -04:00
Virgil Dupras 3819dbc083 forth: remove CMPDST 
We now always do ","-style writes in (HERE), even in IMMEDIATE mode. Simplifies
things and paves the way for compiling words in Forth.
 2020-03-12 13:08:11 -04:00
Virgil Dupras ff281f69a8 forth: add "UNWORD" flag 
Also, reorder word fields so that the flag field is more easily accessible.
 2020-03-12 11:39:27 -04:00
Virgil Dupras a8e573c84a forth: add bin dict compilation stage! 
Big one.

This allows us to write higher order words directly in Forth, which is much
more convenient than writing post-immediate (see "NOT" structure in diff if
you want to see what I mean) structures in ASM.

These structures can then be written to ROM (rather than loaded in RAM for
definitions loaded at run-time).

That's quite a bit of tooling that was added, 2 compilations stages, but I
think it's well worth it.
 2020-03-12 00:14:44 -04:00
Virgil Dupras f89e7bd503 forth: add words "C@" and "C!" 2020-03-11 22:11:54 -04:00
Virgil Dupras 80f63cd185 forth: add words "2DUP", "2SWAP", "2OVER" 2020-03-11 21:58:16 -04:00
Virgil Dupras d8542f7cf7 forth: fix "NOT" 
Ouh, I need a solution here...
 2020-03-11 19:59:10 -04:00
Virgil Dupras ea5f33558a forth: make branching offsets 1 byte 
Those bytes, those precious bytes!
 2020-03-11 19:52:49 -04:00
Virgil Dupras abdf2c8adc emul/forth: allow running commands from file 2020-03-11 19:03:47 -04:00
Virgil Dupras 3996f0c825 forth: fix IF/THEN/ELSE in colon defs 2020-03-11 17:53:27 -04:00
Virgil Dupras 02b56c547a forth: make branching cells store relative offsets 
This should help with fixing IF/THEN/ELSE in colon defs.
 2020-03-11 16:46:25 -04:00
Virgil Dupras 6757c097ea forth: change the whole execution model again 
Things are better now, but immediates inside colons are broken. However,
IF/THEN/ELSE are now immediates and it's much cleaner this way. Still, this
commit has too much stuff in it, I need to commit, I don't want to lose this
step.
 2020-03-10 21:37:06 -04:00
Virgil Dupras 2ddca57f3f forth: add string and logic routines, as well as "RECURSE" 
The goal was to be able to implement "(" in forth, but I realised that my
INTERPRET approach was wrong. Compiling the line beforehand is, after all,
not good. I'll have to change it again.
 2020-03-10 16:02:40 -04:00
Virgil Dupras aac0a57a68 forth: add words "PC!" and "PC@" 2020-03-10 13:00:57 -04:00
Virgil Dupras e95614755b emul: add forth target 2020-03-09 22:26:02 -04:00
Virgil Dupras 0b3f6253e4 forth: add support for IMMEDIATE words 2020-03-09 22:13:11 -04:00