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Author SHA1 Message Date
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
23fd493013 core: make a bit more zasm-friendly 2019-05-14 16:42:44 -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
71cbd24e1f Add filesystem docs 2019-05-12 16:06:27 -04:00
Virgil Dupras
4f44d3de63 parts/z80/fs: add "fopn" command 2019-05-12 15:38:58 -04:00
Virgil Dupras
9b4b907236 tools/emul/shell: fix srong SeekL return value 
Also, add warning on attempts to write to ROM.
 2019-05-12 14:32:24 -04:00
Virgil Dupras
51bab80a4c parts/z80/fs: fix fsInitMeta writing to ROM 2019-05-12 14:31:35 -04:00
Virgil Dupras
1ea5bedb4f blockdev: fix broken blkSeek/blkTell 
scas didn't warn about this, but it seems that `jr` calls were out of
range. Seek and Tell was broken. Replacing `jr` with `jp` does the
trick.
 2019-05-12 13:57:37 -04:00
Virgil Dupras
c77d96da22 blockdev: clarify routines specs 2019-05-12 11:45:08 -04:00
Virgil Dupras
a86738ae84 tools/emul/shell: add filesystem support 
With the help of the newly-introduced cfspack tool, we can mount a
filesystem in our emulated shell and play around. Read-only for now.
Unpacking incoming.
 2019-05-12 11:20:31 -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
6aa53afabc zasm: add memdump mode 2019-05-12 08:49:59 -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
6a804a9c64 zasm: buffer stdin in emulator 
Also, add a port for rewinding stdin.
 2019-05-10 19:55:01 -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
193e6e066c Add tools/emul 2019-05-09 12:58:41 -04:00
Virgil Dupras
02808572e6 Update docs 2019-05-09 10:48:36 -04:00
Virgil Dupras
d8bc9c2bdd parts/z80/sdc: implement blockdev's GetC 2019-05-09 10:47:57 -04:00
Virgil Dupras
65a666bfda Re-license to GPLv3 
I realize that libz80 is GPL and that this project is MIT. That's not
much of a problem as long as libz80 isn't a big part of the project, but
I'm planning on building more around libz80 so that zasm can replace
scas as an assembler even on modern machines (through an emulated
layer) so that this project can become entirely self-bootstrapped.

If I'm going to do that, I might as well be kosher license-wise. I
don't care much about whether the project is GPL or MIT...
 2019-05-08 20:18:05 -04:00
Virgil Dupras
54d0286486 parts/z80/sdc: add sdcSetBlkSize and sdcReadBlk 2019-05-08 20:08:17 -04:00