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collapseos
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332 Commits

Author SHA1 Message Date
Virgil Dupras 77a23cee84 ed: fix bufDelLines logic 
It was mostly wrong.
 2019-07-14 16:18:33 -04:00
Virgil Dupras 5669884508 ed: read initial contents in bufInit 2019-07-14 12:19:37 -04:00
Virgil Dupras 3b0029335a ed: add README 2019-07-14 11:31:14 -04:00
Virgil Dupras 8af1cf468c ed: add 'd' cmd 2019-07-14 10:32:28 -04:00
Virgil Dupras 50d0dc982c ed: check addr bounds 2019-07-14 09:04:51 -04:00
Virgil Dupras c811d5330c apps/ed: add support for addr ranges 2019-07-13 22:09:17 -04:00
Virgil Dupras 2d9f74c2af apps/ed: refactoring 2019-07-13 21:08:16 -04:00
Virgil Dupras 8cf68dc7ad apps/ed: handle +[n] and -[n] addresses 2019-07-13 16:30:30 -04:00
Virgil Dupras 951dd2206d apps/ed: add the concept of "current line" 2019-07-13 15:28:44 -04:00
Virgil Dupras e0f2a71dfc apps/ed: print specified line 2019-07-13 14:01:20 -04:00
Virgil Dupras 6dbbfa837d apps/ed: add (dummy) line number processing 
Starting to feel interactive...
 2019-07-13 11:53:30 -04:00
Virgil Dupras 3491c26132 apps/ed: start implementing I/O 2019-07-13 11:29:06 -04:00
Virgil Dupras 3d474c9121 apps/ed: first steps 2019-07-13 09:57:37 -04:00
Virgil Dupras 54b0602710 zasm: add support for RES and SET 2019-07-02 14:12:29 -04:00
Virgil Dupras 3a8b5108f7 zasm: make .fill support word arguments 2019-07-01 10:56:03 -04:00
Virgil Dupras 9fb77054c0 Update docs w.r.t. its relationship with scas 2019-06-19 13:34:06 -04:00
Virgil Dupras 7cdc288ef2 zasm: print progress indicator while assembling 2019-06-19 11:42:39 -04:00
Virgil Dupras 6516ff7212 zasm: add support for "XOR n" and "SLA r" 2019-06-18 14:24:43 -04:00
Virgil Dupras 5e31de0bac apps/memt: new app 2019-06-16 20:53:21 -04:00
Virgil Dupras 3e7d181d3c zasm: properly raise error on bas ioPutC calls 2019-06-15 20:01:17 -04:00
Virgil Dupras 4327153ffd zasm: fix include EOF detection 
That was an interesting bug. It didn't cause a problem in emulation, but
in an RC2014 on an SD card, an include that didn't end with two newlines
would cause an infinite loop.
 2019-06-15 15:50:27 -04:00
Virgil Dupras 92a04f4627 sdc: support 24-bit addressing 
Needed if we want to compile the kernel and zasm from within a SD card.
I didn't go straight for 32-bit because it was significantly more
complex and 24-bit give us 16M. Enough to go on for a while...
 2019-06-15 13:41:20 -04:00
Virgil Dupras e7c07cdd9a apps/at28w: fix argument byte order 2019-06-14 21:11:45 -04:00
Virgil Dupras 93981e00eb zasm: fix include line no in error reports 
Weren't properly saved during local pass back and forth.
 2019-06-14 20:26:39 -04:00
Virgil Dupras c613f7b0ee recipes/rc2014/eeprom: fix broken a28w args passing 
That's why the command seemed slow! It's much faster than I thought.
 2019-06-14 16:30:01 -04:00
Virgil Dupras 817636242a Add at28w app and recipe 
This allows us to write to an AT28 EEPROM from within collapse os.
 2019-06-14 14:15:30 -04:00
Virgil Dupras 145b48efb7 Add apps/sdct 
A new app to stress test the SD card driver. Also, accompanying this
commit, changes solidifying the SD card driver so that stress tests
actually pass :)
 2019-06-10 15:54:15 -04:00
Virgil Dupras c18d42f08b fs: further adjust to previous blkdev refactoring 
Previous refacoring broke all seek/tell within fs. fs handles now lost
the responsibility to keep track of current position. It's blkdev's job.
 2019-06-04 20:45:01 -04:00
Virgil Dupras ae028e3a86 blockdev: make implementors "random access" 
This huge refactoring remove the Seek and Tell routine from blockdev
implementation requirements and change GetC and PutC's API so that they
take an address to read and write (through HL/DE) at each call.

The "PTR" approach in blockdev implementation was very redundant from
device to device and it made more sense to generalize. It's possible
that future device aren't "random access", but we'll be able to add more
device types later.

Another important change in this commit is that the "blockdev handle" is
now opaque. Previously, consumers of the API would happily call routines
directly from one of the 4 offsets. We can't do that any more. This
makes the API more solid for future improvements.

This change forced me to change a lot of things in fs, but overall,
things are now simpler. No more `FS_PTR`: the "device handle" now holds
the active pointer.

Lots, lots of changes, but it also feels a lot cleaner and solid.
 2019-06-04 15:36:20 -04:00
Virgil Dupras 465da6a79d zasm: add .out directive 2019-06-03 11:13:31 -04:00
Virgil Dupras 04bf2117b2 tools/emul: re-organize .h files 
What used to be `tools/emul/user.h` was in fact specific to zasm, so I
moved it there.

To avoid name confusion, I renamed what used to be kernel.h and user.h
to kernel-bin.h and user-bin.h.
 2019-06-03 08:12:44 -04:00
Virgil Dupras 21c677a950 Make parseArgs not expect a leading space 2019-06-02 14:46:07 -04:00
Virgil Dupras f8bd8eeaaf Make userspace parse args the same way the shell does 2019-06-02 14:05:20 -04:00
Virgil Dupras 7c191fd978 fs: standardize file handle routine argument to IX 
Using HL/DE was awkward and error-prone.
 2019-05-31 14:28:06 -04:00
Virgil Dupras 83771b538f fs: check for file size bounds in GetC 2019-05-31 11:12:29 -04:00
Virgil Dupras 6403ab1acf zasm: add support for SRL r 2019-05-30 14:46:25 -04:00
Virgil Dupras 2c80924df9 zasm: indicate include lineno in errors 2019-05-28 09:57:29 -04:00
Virgil Dupras 8def8e7c38 zasm: add lineno to error reports 
For now, top-level only
 2019-05-27 20:52:40 -04:00
Virgil Dupras e414e600ea zasm: add ERR_DUPSYM and ERR_OOM error conditions 2019-05-27 17:45:05 -04:00
Virgil Dupras b298e607bd zasm: implement error conditions for #inc 2019-05-27 14:21:46 -04:00
Virgil Dupras 31f7c7771d zasm: implement error conditions in .org and .fill 2019-05-27 14:16:40 -04:00
Virgil Dupras 371076190f zasm: implement error conditions in .equ 2019-05-27 14:07:07 -04:00
Virgil Dupras 436ff51c39 zasm: implement error conditions in .dw 2019-05-27 13:52:58 -04:00
Virgil Dupras f5d4321ece zasm: implement error conditions in .db 2019-05-27 13:44:53 -04:00
Virgil Dupras d76dd54f4b zasm: add ERR_OVFL 2019-05-27 12:12:21 -04:00
Virgil Dupras f9118ef88e xasm: expand ERR_BAD_ARG condition 2019-05-27 12:05:42 -04:00
Virgil Dupras e1e6d52fea zasm: add ERR_BAD_FMT 2019-05-27 11:58:12 -04:00
Virgil Dupras 412b3f374a zasm: add ERR_BAD_ARG 2019-05-27 11:22:38 -04:00
Virgil Dupras af2c561c6b zasm: begin erroring out reliably 
Up until now, invalid source input had undefined behavior. We're now
beginning to define that behavior so that zasm can be a bit more usable.
 2019-05-27 11:04:31 -04:00
Virgil Dupras 976a93971c zasm: improve docs 2019-05-27 10:38:29 -04:00
Virgil Dupras c40bc329d5 zasm: fix expr returning wrong values on first pass 
To run a parseExpr on first pass would always return a false success
with dummy value because symbols are configured to always succeed on
first pass. This would make expressions like ".fill 0x38-$" so bad
things to labels because "0x38-$" wouldn't return the same thing on
first and second pass.

Revert to parsing literals and symbols after having scanned for
expressions and add a special case specifically for char literals (which
is why we scanned for literals and symbols first in the first place).
 2019-05-20 10:46:27 -04:00
Virgil Dupras e18f9b53a9 zasm: add support for "$" symbol 
Allows for the ".fill x-$" pattern.
 2019-05-20 09:17:50 -04:00
Virgil Dupras 848a7500bc zasm: add support for .fill directive 2019-05-20 08:39:53 -04:00
Virgil Dupras acddb045a5 zasm: add support for .org directive 2019-05-19 14:40:42 -04:00
Virgil Dupras bc1496a7e3 zasm emul: bring back kernel/user distinction 
It was a bad idea to remove it. Now that I'm introducing the concept of
a per-app glue file, it becomes much easier to build emulated zasm as a
userspace app.
 2019-05-19 12:57:59 -04:00
Virgil Dupras 7fad3b0c90 Move /parts/z80 to /kernel 
Let go of that "meta os" thing. it's not as meta as I made it sound
like. It's a kernel.
 2019-05-19 11:19:41 -04:00
Virgil Dupras 78d9764005 zasm: can now assemble zasm/expr.asm! 2019-05-19 10:45:11 -04:00
Virgil Dupras 6cbce0533a zasm: can now assemble zasm/instr.asm! 2019-05-19 10:40:45 -04:00
Virgil Dupras ea8477bb91 zasm: accept whitespaces before separating comma 2019-05-19 10:39:29 -04:00
Virgil Dupras 3b1ef2b9af zasm: bump global symbol limit to 0x200 2019-05-19 09:54:42 -04:00
Virgil Dupras 44abc79850 zasm: add support for SBC HL, ss 2019-05-19 09:54:02 -04:00
Virgil Dupras d9fff16157 zasm emul: get rid of the kernel/user distinction 
Made things complicated for nothing.
 2019-05-19 09:14:40 -04:00
Virgil Dupras 98695f9912 zasm: de-index symRegister 
Make symRegister's logic pointer-based so we can break through the 0x100
limit.
 2019-05-19 09:06:24 -04:00
Virgil Dupras c01816b055 zasm: make instr a bit more zasm-friendly 
But we're still at a certain distance from assembling it with zasm:
we're busting the 0x100 symbol limit.
 2019-05-18 21:07:35 -04:00
Virgil Dupras bccf933ea9 zasm: try for regular number or symbol before parsing expr 
Previously, we would mess up literals like '-'.
 2019-05-18 21:06:31 -04:00
Virgil Dupras 723497af69 zasm: can now assemble zasm/directive.asm! 2019-05-18 20:37:34 -04:00
Virgil Dupras 9f6ebf538d zasm: can assemble zasm/tok.asm! 2019-05-18 20:31:52 -04:00
Virgil Dupras fd11941867 zasm: can now assemble zasm/parse.asm! 2019-05-18 19:59:58 -04:00
Virgil Dupras 2ce6b61964 zasm: add support for RLC r and RRC r 2019-05-18 19:59:31 -04:00
Virgil Dupras 29f0bcbe23 zasm: can now assemble zasm/symbol.asm! 2019-05-18 18:56:27 -04:00
Virgil Dupras 84090dcd14 zasm: add support for RL r and RR r 
Also, make zasm assemble zasm/util.asm again!
 2019-05-18 15:41:21 -04:00
Virgil Dupras d47d07757e zasm: fix expr operator priority 2019-05-18 15:17:56 -04:00
Virgil Dupras 068e4327ec zasm: fix false truncation error on "-" expressions 2019-05-18 14:51:11 -04:00
Virgil Dupras 650eec23de zasm: add LD r, (IX/Y+d) support 2019-05-17 23:01:29 -04:00
Virgil Dupras f44c3e5413 zasm: fix 3-digit hex parsing 2019-05-17 23:00:57 -04:00
Virgil Dupras cdb6cce914 zasm: add multiplication expressions 2019-05-17 22:22:10 -04:00
Virgil Dupras 157ac03e25 zasm: can now assemble zasm/util.asm! 2019-05-17 20:47:43 -04:00
Virgil Dupras 28d5ebdc8a Make apps folder into a namespace 
To straighten out includes and to pave the way into zasm being part of
the same "include CFS" as parts, we make zasm includes namespaced.
 2019-05-17 20:22:32 -04:00
Virgil Dupras ae2187ad06 zasm: avoid ';' literal 
Simplifies comment stripping through sed.
 2019-05-17 19:49:37 -04:00
Virgil Dupras d58cf122a8 zasm: fix regression with lowercase (ix+d) parsing 2019-05-17 19:32:58 -04:00
Virgil Dupras 2a97966bdc zasm: add LD IX/IY, NN instructions 2019-05-17 17:43:42 -04:00
Virgil Dupras 21c49d80cf zasm: allow single quote to contain whitespace 2019-05-17 17:22:16 -04:00
Virgil Dupras 40d5530666 zasm: allow expression in .db 2019-05-17 17:21:49 -04:00
Virgil Dupras 556be3f0ce zasm: allow for whitespace inside string literals 
Also, increase scratchpad size. It wasn't big enough for some
expressions in shell unit.
 2019-05-17 16:44:08 -04:00
Virgil Dupras f9dac15449 zasm: add support for string literals in .db 2019-05-17 16:17:22 -04:00
Virgil Dupras 16922da3d4 zasm: support multiple elements in .dw and .db 2019-05-17 15:39:28 -04:00
Virgil Dupras b0318f4891 zasm: make instr unt write directly to ioPutC 
Couldn't get rid of instrUpcode though, too complicated.
 2019-05-17 15:35:49 -04:00
Virgil Dupras 26d6dd1912 zasm: remove direcData buffer 2019-05-17 15:14:38 -04:00
Virgil Dupras ad7428e471 zasm: make io unit handle PC and output suppression 2019-05-17 14:58:16 -04:00
Virgil Dupras 6547e83f20 zasm: improve comma processing 
We don't treat "," exactly as a whitespace anymore. We have specific
processing for it.
 2019-05-17 14:34:38 -04:00
Virgil Dupras 3a91e9eb46 zasm: add support for PUSH/POP IX/IY 2019-05-17 14:00:37 -04:00
Virgil Dupras c1b09123f1 zasm: add support for RETI and RETN 2019-05-17 13:21:49 -04:00
Virgil Dupras 072aad775a zasm: don't match prefixes in symFind 
Only match when full names match.
 2019-05-17 13:14:16 -04:00
Virgil Dupras 92a119105d zasm: add support for "0b" literals 2019-05-17 10:34:01 -04:00
Virgil Dupras 0f5fab23e9 zasm: don't accept "0X" prefix for hex anymore 
This was only necessary in the time where input was upcased right after
reading.
 2019-05-17 10:03:36 -04:00
Virgil Dupras 4075c90d44 Add unit test for zasm's parse unit 2019-05-17 10:00:30 -04:00
Virgil Dupras 7083116379 zasm: remove JUMP_ prefixes 
They serve no purpose and make the code less flexible.
 2019-05-17 09:50:11 -04:00
Virgil Dupras 2f0dd5d668 zasm: iiiiiiiincluuuuuuudes!!1! 2019-05-16 21:15:00 -04:00
Virgil Dupras 22c7eeaa5d Move apps/zasm/tests to tools/tests/zasm 
This 'apps' folder is going to disappear. Everything is going to be a
"part" to be assembled through recipes. 'apps' has no meaning.
 2019-05-16 11:23:15 -04:00
Virgil Dupras 0ae91e55ec zasm: big local symbols overhaul 2019-05-16 08:26:00 -04:00
Virgil Dupras e9244b80ee zasm: big I/O overhaul 
Instead of buffering input in memory one line at a time, we go in "just
in time" mode and always read contents directly from I/O, without
buffering.

It forces us to implement a `ioPutback` scheme, but on the other hand it
greatly simplifies cases where multiple tokens are on the same line
(when a label is directly followed by an instruction).

The end result feels much more solid and less hackish.
 2019-05-16 07:53:42 -04:00
Virgil Dupras 34ff0a6c2a zasm: consolidate code 2019-05-15 15:27:33 -04:00
Virgil Dupras a2b5b1efab zasm: add one layer of indirection in symbol registry 
We'll need it for an upcoming "local labels" registry.
 2019-05-15 14:30:41 -04:00
Virgil Dupras fa28d64278 zasm: change ioRewind to ioSeek 
Will need it soon.
 2019-05-15 13:41:56 -04:00
Virgil Dupras 33a1ee250d zasm: rename curOutputOffset to ZASM_PC 2019-05-15 13:31:49 -04:00
Virgil Dupras a994867a86 Wohoo! zasm assembles core.asm!!! 2019-05-14 16:50:35 -04:00
Virgil Dupras b0218349ff zasm: support multiple instructions on single line 2019-05-14 16:45:56 -04:00
Virgil Dupras 1010e8372c zasm: add support for subtractions in expressions 2019-05-14 16:39:10 -04:00
Virgil Dupras 67803f6cb5 zasm: don't upcase char literals 2019-05-14 15:42:15 -04:00
Virgil Dupras 72d2a8f073 zasm: add support for + expressions 2019-05-14 15:26:29 -04:00
Virgil Dupras 99a7c94c9f zasm: make "double parsing" a bit more solid 
It was previously skipped on a local label.
 2019-05-14 14:35:34 -04:00
Virgil Dupras 7972b92be1 zasm: refactoring 2019-05-14 14:32:12 -04:00
Virgil Dupras 2c0166814f zasm: support inline labels 
That is, labels with code following right afterwards.
 2019-05-14 14:10:20 -04:00
Virgil Dupras a486a2a81e zasm: support char literals 2019-05-14 13:53:12 -04:00
Virgil Dupras 2de69ee7cd zasm: add support for local labels 2019-05-13 20:23:10 -04:00
Virgil Dupras 17dbee6a49 zasm: deduplicate code 2019-05-13 19:47:34 -04:00
Virgil Dupras 746c86cbf8 zasm: make getSymVal not responsible for calling symFind 
With local labels, these two will have to be decoupled.
 2019-05-13 16:53:52 -04:00
Virgil Dupras c9deac599e zasm: add support for LD r, r' instructions 2019-05-13 16:38:09 -04:00
Virgil Dupras 878bc2919f zasm: add support for relative labels 2019-05-12 22:07:21 -04:00
Virgil Dupras 1e3982d3ab zasm: make DE indicate the last line to be read 
Facilitates debugging
 2019-05-12 21:44:59 -04:00
Virgil Dupras dd6fa5d38b zasm: properly propagate error conditions 
Gives clearer output on errors. Easier debugging...
 2019-05-12 21:31:11 -04:00
Virgil Dupras 86cad39de4 zasm: fix wrong logic in .numberTruncated error condition 
`xor c` didn't do what I thought it did at the time. Newbie mistake,
there are probably a lot like this scattered around...
 2019-05-12 21:23:24 -04:00
Virgil Dupras d6f5cf5b90 zasm: fix first pass inversion bug 
Also, confirm in tests that we can refer to other symbols in `.equ`.
 2019-05-12 08:50:29 -04:00
Virgil Dupras 89848dbfe2 zasm: add support for .equ 2019-05-11 22:11:05 -04:00
Virgil Dupras 6d4515cd03 zasm: little code reorganisation 2019-05-10 21:19:34 -04:00
Virgil Dupras 95f53d0ce3 zasm: support symbols in .dw directive 2019-05-10 21:17:19 -04:00
Virgil Dupras c000d5cfb1 zasm: support forward label references! 2019-05-10 21:14:46 -04:00
Virgil Dupras c239ec7dea zasm: read input in two passes 2019-05-10 20:32:05 -04:00
Virgil Dupras 34ee91a0d7 zasm: use blkdev IDs as input and output 
This will soon allow use to seek and tell on input, which is necessary
for a second pass which is necessary for forward symbol references.

This require making `blkSel` a bit more flexible. Rather than having one
global selected blkdev, each app can select its own, in its own memory
space.
 2019-05-10 19:33:34 -04:00
Virgil Dupras 5a6078df4d zasm: add support for hex literals 2019-05-09 22:14:11 -04:00
Virgil Dupras b87feac785 zasm: add support for labels! 2019-05-09 21:21:08 -04:00
Virgil Dupras 1c17dcb7a2 zasm: consolidate code 2019-05-09 15:55:29 -04:00
Virgil Dupras d34aff67bb zasm: Read from and write to streams instead of memory 2019-05-09 15:36:03 -04:00
Virgil Dupras 7f27d63c19 Move apps/zasm/emul to tools/emul 2019-05-09 14:09:40 -04:00
Virgil Dupras f9ae5ca46b zasm: simplify readWord calling 
It always reads in the scratchpad with the same max size. No need for
DE-dancing anymore.
 2019-05-01 14:19:43 -04:00
Virgil Dupras 6811d98618 zasm: add support for the ".dw" directive 2019-05-01 14:07:01 -04:00
Virgil Dupras dde5161fc1 zasm: add support for ".db" directive 2019-05-01 11:26:41 -04:00
Virgil Dupras 28e1ba5e26 zasm: adjust parseLine success condition 
De-couple "success" from "wrote something to (DE)" so that directive
parsing can be considered successful without writing to (DE).
 2019-05-01 10:16:57 -04:00
Virgil Dupras a00bc8cc4b zasm: remove the "token" variable 2019-04-30 22:32:12 -04:00
Virgil Dupras 5fd9b7812c zasm: make each token type parse the remaining of line directly 2019-04-30 21:55:18 -04:00
Virgil Dupras a7693ffd86 zasm: still inching toward directives 2019-04-30 21:40:22 -04:00
Virgil Dupras 1ffe05dd09 zasm: creep in the notion of directive 2019-04-30 21:27:44 -04:00
Virgil Dupras 8241298c8f zasm: code consolidation 2019-04-30 21:13:37 -04:00
Virgil Dupras 98ad223ee1 zasm: introduce the concept of instruction ID 
It will make tokenization cleaner and it also makes the instruction
table significantly more compact.
 2019-04-30 20:26:41 -04:00
Virgil Dupras 79b5c701f6 zasm: move token variables from tok.asm into main.asm 2019-04-30 17:04:42 -04:00
Virgil Dupras a7635cb1ea zasm: allow blank lines in asm source code 2019-04-30 16:24:45 -04:00
Virgil Dupras eb5c974573 zasm: allow leading whitespace in parsed lines 2019-04-30 16:08:56 -04:00
Virgil Dupras 57c3dfece8 zasm: assemble multiple lines at once 2019-04-30 15:51:39 -04:00
Virgil Dupras 2653826dff zasm: move zasm.asm to instr.asm and create main.asm 
instr.asm is for single instruction assembly.
 2019-04-30 13:52:14 -04:00
Virgil Dupras 175e1328e7 zasm: consolidate 
* Build emulated zasm statically
* Improve comments in zasm.asm
* Fix build
* Use unsetZ from core
 2019-04-30 13:45:31 -04:00
Virgil Dupras b4694225c5 blockdev: change GetC API 
Instead of waiting, GetC always return immediately, with Z indicating if
something was fetched. The "wait" loop is implemented by the called (and
in the new `blkGetCW`).

This simplifies out-of-bounds verifications for storage blockdevs.
 2019-04-22 14:26:16 -04:00
Virgil Dupras 63afa5798b zasm: add a bunch of instructions 2019-04-21 14:49:33 -04:00
Virgil Dupras 8594084b06 zasm: simplify code 2019-04-21 14:23:24 -04:00
Virgil Dupras 93eb262083 zasm: add a bunch of instructions 2019-04-21 14:12:06 -04:00
Virgil Dupras e9e2f30fc5 zasm: add support for BIT 2019-04-21 13:41:55 -04:00
Virgil Dupras e073fbff79 zasm: add support for "special instructions" 
Let's not create complex rules for exception cases.
 2019-04-21 12:58:28 -04:00
Virgil Dupras ecf7d7fbd6 zasm: add a bunch of instructions 2019-04-21 11:49:20 -04:00
Virgil Dupras 056bbde710 zasm: add support for IX/IY with displacement 2019-04-21 10:55:47 -04:00
Virgil Dupras 14a410b024 zasm: extract tok.asm from zasm.asm 2019-04-21 09:25:52 -04:00
Virgil Dupras 89972ca210 zasm: add a bunch of instructions 2019-04-20 23:03:13 -04:00
Virgil Dupras 115dc18971 zasm: add support for extended instructions 2019-04-20 22:37:38 -04:00
Virgil Dupras 70f61ec451 zasm: a bit of refactoring 2019-04-20 20:35:45 -04:00
Virgil Dupras f6dddaa380 zasm: add automated tests and fix a bunch of bugs 
A python script generates all possibilities for all supported
instructions and compare zasm output with scas. After having fixed a
couple of bugs, all tests pass!
 2019-04-17 21:03:20 -04:00
Virgil Dupras 8ce528c752 zasm: add a bunch of instructions 2019-04-17 17:08:45 -04:00
Virgil Dupras 76caf944dd zasm: add support for the "e" arg type (djnz, jr) 2019-04-17 16:26:04 -04:00
Virgil Dupras c5c8369ce9 zasm: Add support for (NN) constants 2019-04-17 16:04:24 -04:00
Virgil Dupras e1d6178457 zasm: add a bunch of instructions 2019-04-17 15:25:35 -04:00
Virgil Dupras 7996a9997a zasm: add support for numerical constants 2019-04-17 14:47:42 -04:00
Virgil Dupras 3fe5eb3e60 zasm: add a bunch of primary instructions 2019-04-17 11:37:49 -04:00
Virgil Dupras a7dc1e7b4a zasm: make "RET cc" work 2019-04-17 11:06:51 -04:00
Virgil Dupras 279f6e0ad8 zasm: invert emulator io_write() handling 
This facilitates debugging. To know the value of `A` at any point,
you can do `out (0), a`. The number of bytes in the output will be the
value of `A`.
 2019-04-17 10:34:30 -04:00
Virgil Dupras 9b556c8883 zasm: support "special" groups and groups in arg2 2019-04-17 10:34:10 -04:00
Virgil Dupras a7538473e4 zasm: add support for variable arguments 2019-04-17 08:23:01 -04:00
Virgil Dupras 38e40bfc16 zasm: make the instruction table fixed 
Looping is easier
 2019-04-16 22:46:04 -04:00
Virgil Dupras 8cd400651a zasm: read each argument immediately insto an argspec 
Previously, we would go the other way around: match all available
argspecs to raw argument strings. It's much better to go the other way
around because we can "reduce" each argument much sooner. That will be
important when we start to support constants and expressions.
 2019-04-16 22:40:07 -04:00
Virgil Dupras 1f94b6c3f7 zasm: can now match all "constant" primary opcodes 2019-04-16 20:32:30 -04:00
Virgil Dupras 453cf3d74a zasm: start matching args 
We now properly match arg-less operations.
 2019-04-16 19:40:37 -04:00
Virgil Dupras b3af6e0115 zasm: reuse code from core 2019-04-16 17:00:19 -04:00
Virgil Dupras 9acca52e44 zasm: begin parsing with easy pickings 
Single opcodes that yield constants. "echo ret | zasm" yields 0xc9.
 2019-04-16 16:49:47 -04:00
Virgil Dupras 88cee235b1 zasm: have a whole kernel in emulation instead of a simple wrapper 
zasm is going to need to call to kernel code...
 2019-04-16 14:26:45 -04:00
Virgil Dupras 43c1005d61 zasm: implement stdin/stdout in emulator 2019-04-16 13:59:19 -04:00
Virgil Dupras 1ae2331763 Add zasm app 
For now, only a dummy app, but it's emulated properly with libz80.
Exciting times!
 2019-04-16 13:36:57 -04:00