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collapseos
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1468 Commits

Author SHA1 Message Date
Virgil Dupras 3607eefa55 Add arduinouno/at28 recipe 2020-07-22 17:26:06 -04:00
Virgil Dupras e4a4a9800d z80: Use BC as IP register instead of IY 
It's a bit more inconvenient in terms of register protection (BC
is much more generally useful than IY), but it makes tight spots
such as next and execute much faster, so I think it's worth it.
 2020-07-06 23:31:00 -04:00
Virgil Dupras a7dcb522c2 Make br cells 1 byte wide 
The 1 byte limitation has been effective for a while now, but I
hadn't made the move yet, I wanted to see if the limitation would
cause me problems. It doesn't.

Doing this now slightly facilitates the IY->BC move in z80.

Bootstrapping: if you try to recreate the CVM binary from the
previous commit with this code, you'll have bootstrapping problems.
The first bootstrap will compile a binary with 2-bytes wide cells
but branching conditionals that yields 1-byte cells. That's bad.

I got around the issue by temporarily inserting a "397 399 LOADR"
instruction in cvm/xcomp.fs, right before the xcomp overrides. This
way, I force 1-byte cells everywhere on the first compiliation,
which then allows me to apply the logic change in cvm/vm.c and have
a properly running binary.
 2020-07-06 07:27:50 -04:00
Virgil Dupras bf4ab0f1b4 z80: protect or avoid BC wherever it's used 
For the IY->BC move, of course.
 2020-07-05 23:12:17 -04:00
Virgil Dupras a6e987b5f7 z80: protect BC in _find 
In preparation for the IY->BC move
 2020-07-05 22:43:32 -04:00
Virgil Dupras 6fab30b164 z80: inline lblfind's routine into _find word 2020-07-05 22:35:54 -04:00
Virgil Dupras b9fb6a6226 z80: move boot code around 
Bring native words together, make the next/exec/does/compiled
cluster be at the beginning.

Next step: bring find code into _find word.
 2020-07-05 22:23:40 -04:00
Virgil Dupras 3ea221d0eb z80: inline all uses of pushRS/popRS 
I'm trying to move stuff around and it simplifies things. Will make
a lot more sense to inline when BC replaces IY.
 2020-07-05 21:54:01 -04:00
Virgil Dupras ebf47a2ab5 Fix broken LIT" 2020-07-05 20:50:08 -04:00
Virgil Dupras 8bb9230f49 z80a: make PUSH* macros use DE instead of BC 
This is in preparation of using BC instead of IY for IP. I've
verified all PUSH* usage and none was problematic.
 2020-07-05 17:36:31 -04:00
Virgil Dupras 293a561ab2 Fix SDC tests 2020-07-05 15:01:59 -04:00
Virgil Dupras f2f520cacc Extract (br), (?br) and (loop)'s code out of stable ABI zone 
There is now no more actual code in stable ABI, only references.
This makes refactoring of this code much easier. For example,
changing IY to BC as the IP register.
 2020-07-05 14:57:18 -04:00
Virgil Dupras daeb3b3c69 Extract (n) code from stable ABI 2020-07-05 14:16:24 -04:00
Virgil Dupras a2f880b145 z80: remove popRS from stable ABI 2020-07-05 13:44:38 -04:00
Virgil Dupras 5705cd5c31 Extract EXIT code from stable ABI zone 2020-07-05 13:41:12 -04:00
Virgil Dupras 84202da6a6 z80: prettify 2020-07-05 13:15:26 -04:00
Virgil Dupras 4a91ee5c9c Extract (s) code from stable ABI zone 
Only its jump addr remains.
 2020-07-05 08:54:22 -04:00
Virgil Dupras b626944273 z80: move back R* words to native words section 
This allows us to refer to pushRS/popRS routines by labels, allowing
us to get rid of the pushRS reference in the stable ABI zone.
 2020-07-05 08:15:50 -04:00
Virgil Dupras 650481f849 z80/8086: extract 2>R code from stable ABI zone 
Only its jump at 0x33 remains.

I've also fixed a strange offset oddity in 8086's (n) placement.
It was off by 2, but strangely, it ran properly. Anyway, now it's
fixed.
 2020-07-05 08:03:15 -04:00
Virgil Dupras 94cb76520a Refer to stable wordref by direct offset in "hot zone" immediates 
Previously, it was impossible to cross-compile Collapse OS from a
binary-offsetted Collapse OS because stable ABI wordrefs would have
a wrongly offsetted address.

This solves the problem by replacing those wordrefs by direct,
hardcoded stable ABI offset references.
 2020-07-05 07:09:11 -04:00
Virgil Dupras 2111f694f6 VE: 'g' becomes 'G' and 'g' selects line 2020-07-04 07:40:12 -04:00
Virgil Dupras c2b507eaff tools: improve usability on OpenBSD 
So far, I hadn't managed to run those tools properly on OpenBSD. I
was too confused by its stty peculiarities. I'm still confused, but
at least I managed to make them work... most of the time...
 2020-07-02 11:36:53 -04:00
Virgil Dupras a8302920cb tools/memdump: expect proper prompt 2020-06-30 11:06:59 -04:00
Virgil Dupras fff893452d cvm: remove makefile duplicate recipe 2020-06-30 10:29:06 -04:00
Virgil Dupras d97012ecae Fix makefile build-from-clean-repo glitches 2020-06-30 10:24:12 -04:00
Virgil Dupras f09aa0603c rc2014: separate SPI relay and SDC drivers 
My intention is to reuse the SPI relay to program AVR MCUs from a
RC2014.
 2020-06-29 18:48:00 -04:00
Virgil Dupras 1ac7038863 avra: add TOC and instructions list 2020-06-29 08:01:39 -04:00
Virgil Dupras 74e211eeda Fix bugs in ed's U and VE's O/o 
U didn't properly handle inserting on the last line and O's bounds
checks didn't make sense.
 2020-06-28 20:34:39 -04:00
Virgil Dupras 5e01e6405a VE: add @ command 2020-06-28 20:19:42 -04:00
Virgil Dupras 5a2612a9c5 Add HERESTART xcomp config 2020-06-28 19:45:28 -04:00
Virgil Dupras 3068b58be5 Rename RAMSTART to SYSVARS 
It's more descriptive this way. Also, I'll soon add a new HERESTART
config.
 2020-06-28 18:49:30 -04:00
Virgil Dupras 9424770caa rc2014: add a declaration part to ACIA drivers 
Driver configuration don't need their own words at runtime, we only
need to compile them as literals when compiling words.

Now that we have this "declaration blocks" pattern emerging, it
seems like a good idea to take advantage of this in drivers, both
for simplifying the xcomp unit and to make final binary slimmer.
 2020-06-28 17:30:01 -04:00
Virgil Dupras b8800be76f rc2014: improve SD card driver docs 2020-06-28 16:34:41 -04:00
Virgil Dupras 27025bf141 Slight adjustments to bootstrap docs 2020-06-28 07:42:20 -04:00
Virgil Dupras 5052efb60f VE: supress ed's output on E and X 
Most of the time, this output would be hidden by the next screen
update, except when editing the last line.
 2020-06-28 07:04:08 -04:00
Virgil Dupras 101193a78c avra: begin writing docs 2020-06-28 06:57:59 -04:00
Virgil Dupras 440ea43a88 z80a: make mnemonic names more uniform across assemblers 
Initially, I used the same letters as those used in the z80 ref
docs, but it makes the different assemblers harder to use than they
should. Having consistent "argtype" rules across assemblers should
help.
 2020-06-27 22:01:56 -04:00
Virgil Dupras 490c57834f emul: update README 2020-06-27 07:53:58 -04:00
Virgil Dupras 0eb9bd090a Move zasm.sh from emul to cvm 2020-06-27 07:44:43 -04:00
Virgil Dupras 785b375028 tests: separate tests that need to run on z80 vs those that don't 2020-06-27 07:41:42 -04:00
Virgil Dupras ceabc9920f move avra.sh from emul to cvm 
The stage binary is now there.
 2020-06-27 07:32:19 -04:00
Virgil Dupras a65f674c74 emul: build from "cvm" instead of from itself 
The C VM now runs the show.
 2020-06-26 22:08:45 -04:00
Virgil Dupras 1312817117 z80: make boot binary a 2-part process 
Previously, recipes that began spitting binary contents before
loading block 282 would end up with VARIABLE code in their binary,
thus breaking them. We fix this by making this loading process
2-part.
 2020-06-26 21:41:17 -04:00
Virgil Dupras 891e4f861a z80: fix chkPS's "stable ABI" form in binaries with offset 
Before lblnext is set, we need to use BJP, instead of JPnn, for the
jump to work in binaries with offsets.
 2020-06-26 21:24:12 -04:00
Virgil Dupras b3e865d0fb recipes: use cvm's staging binary instead of emul's 
Much faster!
 2020-06-26 21:23:13 -04:00
Virgil Dupras 8a7fa77163 cvm: bootstraps itself! 2020-06-26 18:58:02 -04:00
Virgil Dupras fc3919863f cvm: implement stack underflow errors 2020-06-26 17:55:10 -04:00
Virgil Dupras 9021e5f6e0 cvm: fix does 2020-06-26 17:35:21 -04:00
Virgil Dupras 36cb1389e6 Add a C implementation of native words 
This will soon replace the libz80 based "forth" and
"stage" executables. This is much, much faster.
 2020-06-26 15:50:13 -04:00
Virgil Dupras e8f1464ae5 Re-add Michael Schierl's emulator link to README 
I has removed it when I switched to Forth because it was emulating
the assembler version, but Michael updated it, so I relink it.

The JS VM part is so cool!
 2020-06-24 06:51:43 -04:00