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
