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Author SHA1 Message Date
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
Virgil Dupras
20813f71b8 Remove discussion section from README 
Having this information on the website is enough.
 2020-06-24 06:27:33 -04:00
Virgil Dupras
8607c94922 Update CONTRIBUTING with instructions for sending patches 2020-06-23 22:11:06 -04:00
Virgil Dupras
fb695b67df Replace Travis CI with Sourcehut CI 2020-06-23 20:53:38 -04:00
Virgil Dupras
7eeec67ff5 Add extra words WIPED? and FREEBLKS? 2020-06-23 07:21:33 -04:00
Virgil Dupras
9ab5cda397 ed: rename I to i 
Shadowing core "I" is too messy. As soon as ed is loaded in memory,
nothing else that isn't "i-aware" can be loaded anymore.

I guess that's why "contexts" exist in Starting Forth, but adding
this concept just for allowing the shadowing of core words seems
overkill to me. Renaming I to i in ed seems better.
 2020-06-23 07:08:21 -04:00
Virgil Dupras
af339d8c6a VE: properly make buffer dirty on E and X 2020-06-23 06:53:30 -04:00
Virgil Dupras
2d9a07d215 blkunpack: don't include trailing empty lines 
This was becoming heavy to manage.
 2020-06-23 06:52:34 -04:00
Virgil Dupras
49d7a7f435 z80mbc2: add BLK support 2020-06-22 21:21:24 -04:00
Virgil Dupras
a7660fba0e z80mbc2: new recipe 
ref #82
 2020-06-22 19:09:41 -04:00
Virgil Dupras
94ed01086a pcat: move drivers and xcomp to blkfs 2020-06-22 14:21:25 -04:00
Virgil Dupras
1bea45acb8 8086a: add PUSHs, and POPs, 2020-06-22 13:54:33 -04:00
Virgil Dupras
06d997f26a pcat: write recipe README 2020-06-22 13:34:20 -04:00
Virgil Dupras
496826cdc4 pcat: implement AT-XY 
VE works! well, at this point, we can say that Collapse OS runs on
PC/AT. A little cleanup and docs writing and we're done!
 2020-06-22 06:53:30 -04:00
Virgil Dupras
f76d30b6fe pcat: add blk write support 2020-06-22 06:44:52 -04:00
Virgil Dupras
4939189233 emul: make blk operations much faster 
It helps a bit with staging times.
 2020-06-22 06:29:00 -04:00
Virgil Dupras
515890717f pcat: use heads count from 13H08H 
On real hardware, there aren't always 2 heads...
 2020-06-22 05:59:26 -04:00
Virgil Dupras
d7f002df98 pcat: use boot drive no passed to bootloader through DL 
instead of hardcoded drive 0.
 2020-06-21 22:53:11 -04:00
Virgil Dupras
dc7f36263a pcat: BLK-enabled! 
That INT 13H logic was a bit tricky to implement...

read-only for now.
 2020-06-21 22:07:12 -04:00
Virgil Dupras
8d645405b3 pcat: add RSP checks in next 2020-06-21 15:14:38 -04:00
Virgil Dupras
f9eb7c661b 8086asm: fix CMPrr, and CMPxx, argument order 2020-06-21 14:55:14 -04:00
Virgil Dupras
cd514e6cd6 pcat: add PSP checks in all native words 
Also, fix (roll) which wasn't properly implemented.
 2020-06-21 14:07:02 -04:00
Virgil Dupras
c2c32bbed8 pcat: properly handle IMMED flag in _find 2020-06-21 13:09:51 -04:00
Virgil Dupras
1b5333d0b4 pcat: move all find code in _find word 
It isn't used by low level boot code anymore, so it can go there.
 2020-06-21 11:57:12 -04:00
Virgil Dupras
dbd283758c Refer to BOOT and (uflw) by addr in stable ABI 
Was previously referred to by name+find, which was wasteful.
 2020-06-21 11:41:10 -04:00
Virgil Dupras
dcaa515929 pcat: implement does 2020-06-21 10:40:09 -04:00
link2xt
d83d12899b
MOVE: do not crash when u is 0 (#126) 
This commit adds ?DUP IF guards to MOVE and MOVE- that make them exit
when u is 0. Without these guards a DO loop was executed 65535 times
instead of 0.

In particular, this fixes a crash when "105 LOAD I " is executed
immediately after boot. Block editor word "I" passes IBUF length (0)
to MOVE- and MOVE in this case, causing a crash.
 2020-06-21 05:49:45 -05:00
Virgil Dupras
99c05fff3c pcat: it works! 
Forth intepreter now works! There's still DOES> and overflow checks
to implement, but otherwise, we have it!
 2020-06-20 20:06:42 -04:00
Virgil Dupras
ae719508d9 pcat: make /MOD division 16-bit 
Was required for the many "256 /MOD" in the code.
 2020-06-20 19:14:51 -04:00
Virgil Dupras
60ecab314e pcat: we have PROMPT! 
Not working, but we do get that sweet "CollapseOS".
 2020-06-20 16:58:48 -04:00
Virgil Dupras
397ee3e3e6 Simplify word ' 2020-06-20 14:13:41 -04:00
Virgil Dupras
1536434666 pcat: implement cell execution and shaping things up 2020-06-20 13:50:01 -04:00
Virgil Dupras
c571567660 emul: make verbose staging the default 
I always keep it on myself. I can imagine it's especially useful to
newcomers.
 2020-06-20 13:41:39 -04:00
Virgil Dupras
acf8e03f53 8086asm: add overflow check to RPCs, 
I've spent way too much time debugging bugs caused by this...

*sigh*, why can't I learn?
 2020-06-20 13:36:21 -04:00
Virgil Dupras
019fd8a67d pcat: fix ?DUP 2020-06-20 07:34:46 -04:00
Virgil Dupras
9d2afd200c pcat: implement (s) 2020-06-19 20:09:51 -04:00
Virgil Dupras
723d3c4249 pcat: all native words implemented! 
(well, not PC@ and PC!, but I'm not even sure what would be the role
of these in a PC/AT. they're only used in drivers on the z80 front,
so they will not be immediately needed. todo... )

Now comes the fitting part.
 2020-06-19 08:10:51 -04:00
Virgil Dupras
8cc8df0446 pcat: add native _find 2020-06-19 07:56:54 -04:00
Virgil Dupras
5ebdf84e78 pcat: more native words 
almost there!
 2020-06-19 07:26:33 -04:00
Virgil Dupras
89bc7df120 pcat: more native words 2020-06-18 23:10:14 -04:00
Virgil Dupras
3b21ba635d pcat: add PICK and (roll) 2020-06-18 21:21:46 -04:00
Virgil Dupras
6b07296d30 pcat: more native words 2020-06-18 19:06:53 -04:00
Virgil Dupras
bd508daad9 pcat: begin organizing native words properly 
This port is taking shape!
 2020-06-18 15:28:30 -04:00
Virgil Dupras
6bc1738bfd pcat: implement (loop) 
8086 asm is a lot terser than z80... Those indirect memory operations
are very handy.
 2020-06-18 15:01:04 -04:00
Virgil Dupras
aca9bc9058 z80: small optimization in cell execution 2020-06-18 08:02:45 -04:00
Virgil Dupras
035532acf7 z80: remove remaining indirections in execute calls 
We now have a stable ABI that is pretty cleared up...
 2020-06-18 07:50:20 -04:00
Virgil Dupras
42818d25be z80: remove layers of indirection of find calls 2020-06-18 07:40:20 -04:00