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Commit Graph

333 Commits

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
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