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440ea43a88
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336 Commits

Author SHA1 Message Date
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
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
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
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
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
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
Virgil Dupras
76e698157c z80: remove layer of indirection in most "next" calls 
The only calls still using the stable ABI indirection are those
made before the next routine is created.
 2020-06-18 07:24:47 -04:00
Virgil Dupras
eba83fa9a9 z80: use named labels for boot routines 
The usage of numerotated labels for this was becoming severly
confusing.
 2020-06-18 07:16:40 -04:00
Virgil Dupras
eed817b517 pcat: adapt to word type change 2020-06-18 06:50:32 -04:00
Virgil Dupras
3d2dc041fb Make word routines into word types 
Instead of having wordref point to core word routines, I made them
into word 4 word types. It liberates space into the stable ABI and
should make porting to other arches easier.

I'm also thinking of combining word type with the namelen field
for precious bytes saving, but not now...
 2020-06-17 21:41:01 -04:00
Virgil Dupras
3383a00040 Fix recipes with binary offset (ti84, trs80) 
I broke them when I removed call indirection layers without also
removing usage of BCALL.
 2020-06-17 17:44:33 -04:00
Virgil Dupras
1d468d2168 Fix mis-documentation about literal words 2020-06-17 16:31:08 -04:00
Virgil Dupras
2be2f74a43 Make literal word routines into regular native words 2020-06-17 14:25:32 -04:00
Virgil Dupras
ea9833d4ff Remove LITA 
It was useful when we still had the relinker, but now it has no use.
I was waiting a bit to see if the distinction would be useful again,
but it seems like it won't.
 2020-06-17 13:50:42 -04:00
Virgil Dupras
abb4dc8bd7 Reduce the scope of the stable ABI 
Only 2>R in actually needed in the RSP family (for LOOP). Reducing
the scope of the stable ABI makes porting to other arches easier.
 2020-06-17 07:54:43 -04:00
Virgil Dupras
bc8144b4be pcat: implement (br) and (br?) 2020-06-16 22:10:32 -04:00
Virgil Dupras
49979404a5 pcat: implement number literals 2020-06-16 21:34:35 -04:00
Virgil Dupras
a92864a595 pcat: implement RSP mechanism in execution model 2020-06-16 20:41:53 -04:00