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Commit Graph

67 Commits

Author SHA1 Message Date
Andy McFadden
d80132e941 Finish ACME v0.96.4 support
There's no easy way to make non-zero-bank 65816 code work, so I'm
punting and just generating a whole-file hex dump for those.  This
renders tests 2007 and 2009 useless, so I'm hesitant to claim that
ACME support is fully functional.
2019-08-04 14:48:42 -07:00
Andy McFadden
71badf2359 Update for cc65 v2.18
WDM <arg> now works.  MVN/MVP are still broken.  Correct code is
generated for whichever version of the assembler is configured.
Regression tests updated for new version.

Also, fixed a UI bug where manual edits to the assembler path were
being ignored.
2019-08-04 13:38:25 -07:00
Andy McFadden
98914e9f80 Treat BRK as a 1-byte instruction
The 65816 definition makes it a two-byte instruction, like COP.  On
the 6502 it acted like a two-byte instruction, but in practice very
few assemblers treat it that way.  Very few humans, for that matter.
So it's now treated as a single byte instruction, with the following
byte encoded as a data value.
2019-08-02 17:21:50 -07:00
Andy McFadden
2065f4ef9e Attempt to generate segment names for cc65
This worked, sort of.  The problem is that SourceGen will revert to
hex output in certain situations, such as a broken symbolic
reference.  There happens to be one in the ZIPPY example, and it's
on a relative branch.

The goal with the segment stuff is to allow cc65 to treat the
source as relocatable code.  In that context, a relative branch to
an absolute address doesn't make any sense, so the assembler reports
a range error.

We don't currently have a mechanism that guarantees no references
are broken (and no affordance for finding them), so we can't make
this mode the default yet.

Instead, we continue to use the generic config, but generate the
correct set of lines as comments.

(issue #39)
2018-11-18 15:11:29 -08:00
Andy McFadden
17f0faa845 Add linker config scripts to cc65 generator output
The system configuration you get with "-t none" works for smaller
files but fails for larger ones.  This updates the generator to
produce a source file and linker script pair.  (I kinda saw this
one coming -- it's why the gen/asm dialog has a combo box for the
file preview -- so it didn't require that much work.)

This currently generates a fixed script for a generic system with
64KiB of RAM, using .ORGs to set the addresses as before.

With this change, assembling a file with 65536 NOPs succeeds.

(issue #39)
2018-11-18 14:28:44 -08:00
Andy McFadden
2f74fce80b Expand set of things that work with double-click on opcode
If you double-click on the opcode of "JSR label", the code view
selection jumps to the label.  This now works for partial operands,
e.g. "LDA #<label".

Some changes to the find-label-offset code affected the cc65 "is it
a forward reference to a direct-page label" logic.  The regression
test now correctly identifies an instruction that refers to itself
as not being a forward reference.
2018-11-03 15:03:25 -07:00
Andy McFadden
a88c746419 Work around cc65 single-pass behavior
The cc65 assembler runs in a single pass, which means forward
address references default to 16 bits.  For zero-page references
we have to add an explicit width disambiguator.  (This is an
unusual situation that only occurs if you have a zero-page .ORG
in the file after code that references it.)

With this change, 2014-label-dp passes, and no other regression
tests were affected.

(issue #40)
2018-11-02 15:32:54 -07:00
Andy McFadden
c80be07f73 Work around Merlin 32 instruction parsing bug
The 2014-label-dp test now passes.  Prior regression tests are
unaffected.

Also, renamed an IGenerator interface to more accurately reflect
its role.

(issue #37)
2018-11-02 13:49:27 -07:00
Andy McFadden
50e8be186a Add 2014-label-dp
This is primarily to exercise a Merlin 32 failure (issue #37).
However, it also exercises a problem with cc65 (issue #40).
Currently, only 64tass can assemble this project.
2018-10-30 16:07:35 -07:00
Andy McFadden
a8af7e8794 Improve the "common" expression formatter
To avoid confusing the assembler, expressions with a leading
parenthesis like "(foo & $ffff) + 1" are prefixed with a "0+".  This
is not necessary if the operand begins with a '#'.

(issue #16)
2018-10-26 15:45:39 -07:00
Andy McFadden
da91f86043 Get 64tass expressions working
We now insert parenthesis as needed.  This can cause problems in
some situations, so we always prefix parenthetical expressions with
"0+", which looks goofy and is unnecessary for immediate operands.
But it does generate working source code.

Renamed the "simple" expression mode to "common", as it's not
particularly simple but is what you'd expect most assemblers to do.
(OTOH, life has been full of surprises.)

(issue #16)
2018-10-24 14:57:09 -07:00
Andy McFadden
61914c8f79 Progress toward 64tass expression support
Gave cc65 its own expression generator, as the precedence table seems
atypical if not unique.  Configured 64tass to use the "simple"
expression mode.

Added some operations on a 32-bit constant to 2007-labels-and-symbols
to exercise the current worst-case expression (shift + AND + add).
Tweaked the Merlin expression generator to handle it.

(issue #16)
2018-10-24 13:17:03 -07:00
Andy McFadden
f26a03869a Finish the underscore handling in the label localizer
Correctly handle pre-existing underscores and avoidance of
"reserved" labels.

Also, add more underscores to 2012-label-localizer to exercise
the code.

(issue #16)
2018-10-23 20:40:09 -07:00
Andy McFadden
f7e5cf2f45 Progress toward 64tass support
Most tests pass, but 2007-labels-and-symbols fails because the
expressions recognized by 64tass don't match up with either of the
other assemblers.

This is currently using a workaround for the local label syntax.
64tass uses '_' as the prefix, which is unfortunate since SourceGen
explicitly allowed underscores in labels.  (So does 64tass for that
matter, but it treats labels specially when the '_' comes first.)
We will need to rename any non-local user labels that start with '_'.

(issue #16)
2018-10-23 20:08:01 -07:00
Andy McFadden
fd6d8273a9 Add custom flag updaters for ROL/ROR
There are some useful interactions between C/N and maybe Z.  Added
a quick test to 1003-flags-and-branches.

Also, updated the 2008-address-changes tests.  Change b37d3dba
extended the nearby-target range of out-of-file symbols by one, so
one line that didn't get an operand label now does.
2018-10-09 13:15:41 -07:00
Andy McFadden
a23c7e5ab6 Rename undocumented 6502 opcodes to match Unintended Opcodes doc
These *almost* match what cc65 has, and are accepted as primary or
aliases by 64tass.

This combines the LAX and LXA operations.  LXA is the immediate
form of LAX, and behaves somewhat differently (and is unstable).
I was treating them as two separate operations with independent
mnemonics, but that doesn't seem to be the preferred way to
handle it.

The cc65 generator wasn't generating LAX before; now it does.  This
required nudging the width disambiguator, as LAX is a second
example of an instruction with both DP,Y and ABS,Y operands.

(issue #20)
2018-10-05 14:28:45 -07:00
Andy McFadden
2c6212404d Initial file commit 2018-09-28 10:05:11 -07:00