On the 65816, if you say "JSR foo" from bank $12, but "foo" is an
address in bank 0, most assemblers will conclude that you're forming
a 16-bit argument with a 16-bit address and assemble happily. 64tass
halts with an error. Up until v1.55 or so, you could fake it out
by supplying a large offset.
This no longer works. The preferred way to say "no really I mean to
do this" is to append ",k" to the operand. We now do that as needed.
I didn't want to define a new ExpressionMode for 64tass just to
support an operand modifier that should probably never actually get
generated (you can't call across banks with JSR!), so this is
implemented with a quirk and an op flag.
64tass v1.56.2625 is now the default.
(issue #104)
Two things changed: (1) string literals can now hold backslash
escapes like "\n"; (2) MVN/MVP operands can now be prefixed with '#'.
The former was a breaking change because any string with "\" must
be changed to "\\". This is now handled by the string operand
formatter.
Also, improved test harness output. Show the assembler versions at
the end, and include assembler failure messages in the collected
output.
Code generated by one of the C compilers sets up the stack frame and
then maps the direct page on top of it. If the value at the top of
the stack is 16 bits, it will be referenced via address $ff. The
local variable editor was regarding this as illegal, because lvars are
currently only defined for direct page data, and the value doesn't
entirely fit there (unless you're doing an indirect JMP on an NMOS
6502, in which case it wraps around to $00... but let's ignore that).
The actual max width of a local variable is 257 because of the
possibility of a 16-bit access at $ff.
Older versions of SourceGen don't seem to have an issue when they
encounter this situation, as worrying about (start+width) is really
just an editor affectation. The access itself is still a direct-page
operation. You won't be able to edit the entry without reducing the
length, but otherwise everything works. I don't think there's a need
to bump the file version.
Replaced the link at the top of the manual. Remove reference to
old tutorial doc. Added an obsolescence notice to the top of the
old tutorial. Updated tutorial message and link in README.
Also, fixed sidenav style.
There's no need to use XHTML Transitional. The only change outside
the template was to use "id" for anchors instead of "name", as the
latter is deprecated.
The calculations were wrong for certain situations, generating
answers that were useless or that caused a false-positive overflow
error.
This adds a couple of simple regression tests, modeled after layout
of the Lode Runner sprite sheet (which worked fine before) and the
Empire II EWS3 font (which failed).
This also bumps up some of the arbitrary limits in the visualizer.
(issue #94)
The $Cxxx I/O locations are mapped into banks $E0/E1, and are usually
configured to appear in banks $00/01 as well. Direct access to
locations in banks $E0/E1 is common in 16-bit code, but we only had
definitions for $E0.
This adds a clone of definitions for $E1, and renames the symbols
to be _E0/_E1 instead of _GS.
This can also be solved with MULTI_MASK, but that will always use
$E0 as the base address, so references to $E1/Cxxx will have a large
adjustment added ("+$10000"), which is kind of ugly.
Note we still don't have definitions for $01/Cxxx. I'll add those
if I run into them in 16-bit code. (That might be a reasonable use
of MULTI_MASK; feels less ugly somehow.)
A few tweaks:
- Test now requires an ORG on offset +000002, not just a correct
address.
- Suppress on-screen display of the initial ORG directive when
a PRG file is detected. Subtle, but helpful.
- In new project setup, fix initial address for PRG projects that
load at $0000.
- In new project setup, add a "load address" comment to the first line.
Also, fix some out-of-date documentation.
(issue #90)
C64 PRG files are pretty common. Their salient feature is that they
start with a 16-bit value that is used as the load address. The
value is commonly generated by the assembler itself, rather than
explicitly added to the source file.
Not all assemblers know what a PRG file is, and some of them handle
it in ways that are difficult to guarantee in SourceGen. ACME adds
the 16-bit header when the output file name ends in ".prg", cc65
uses a modified config file, 64tass uses a different command-line
option, and Merlin 32 has no idea what they are.
This change adds PRG file detection and handling to the 64tass code
generator. Doing so required making a few changes to the gen/asm
interfaces, because we now need to have the generator pass additional
flags to the assembler, and sometimes we need code generation to
start somewhere other than offset zero. Overall the changes were
pretty minor.
The 20042-address-changes test needed a 6502-only variant. A new test
(20040-address-changes) has been added and given a PRG header. As
part of this change the 65816 variant was changed to use addresses
in bank 2, which uncovered a code generation bug that this change
also fixes.
The 64tass --long-address flag doesn't appear to be necessary for
files <= 65536 bytes long, so we no longer emit it for those.
(issue #90)
Before:
Hint As Code Entry Point
Hint As Data Start
Hint As Inline Data
Remove Hints
After:
Tag Address As Code Start Point
Tag Address As Code Stop Point
Tag Bytes As Inline Data
Remove Analyzer Tags
The goal is to reduce confusion. The old nomenclature was causing
problems because it's inaccurate -- they're directives, not hints --
and made it look like you need to mark data items explicitly. The
new action names emphasize the idea that you should be tagging a
single address for start/stop, not blanketing a region.
This change updates the user interface, manual, and tutorials, but
does not change how the items are referred to in code, and does not
change how the program works.
(issue #89)
Modified the asm source generators and on-screen display to show the
DP arg for BBR/BBS as hex. The instructions are otherwise treated
as relative branches, e.g. the DP arg doesn't get factored into the
cross-reference table.
ACME/cc65 put the bit number in the mnemonic, 64tass wants it to be
in the first argument, and Merlin32 wants nothing to do with any of
this because it's incompatible with the 65816.
Added an "all ops" test for W65C02.
Created the "all ops" tests for W65C02. Filled in enough of the
necessary infrastructure to be able to create the project and
disassemble the file, though we're not yet handling the instructions
correctly.
We were claiming W65C02S, but it turns out that CPU has the Rockwell
extensions and the STP/WAI instructions. We need to change existing
references to be "WDC 65C02", and add a new CPU definition for the
actual W65C02S chip.
This adds the new CPU definition, the instruction definitions for
the Rockwell extensions, and updates the selectors in project properties
and the instruction chart tool.
This change shouldn't affect any existing projects. Still more to do
before W65C02 works though, mostly because the Rockwell instructions
introduced a new two-argument address mode that has to be handled in
various places.
Sometimes you just want to turn cycle counts on for a bit, and going
through app settings is tiresome. Now there's a toolbar checkbox
for it. The icon isn't ideal, but it'll do.
Consider:
LDA $00 loads a value from address $00
LDA $00,X might load from $00, or might not
LDA ($00),Y dereferences $00 as a 16-bit pointer
LDA ($00,X) dereferences a pointer, not necessarily from $00
When perusing the cross-reference list, it's useful to be able to
tell whether an instruction is accessing the location, using it as a
base address, or deferencing it as a pointer. We now show "ptr" in
the list for pointer dereferences. (We already showed "idx" for
indexed accesses.)
The "show cycle counts in comments" setting is the only one that
affects both the on-screen display and generated source code. This
felt a little weird, so it's now two independent settings. This
also provided an opportunity to move it to the initial tab, so it's
easier to toggle on and off. Overall it feels less confusing to have
two settings for essentially the same thing, because code generation
is distinct from everything else.
The "spaces between bytes" setting was moved to the Display Format
tab, which seems a better fit.
Documentation and tutorial have been updated.
Also did a little bit of cleanup in EditAppSettings.
- Added SOS parameter block formatting.
- Normalized SOS call names to values in SOS Reference Manual.
- Added SOS call error code constants.
- (from robjustice) Added more to A3-IO.sym65.
Also, rearranged the ProDOS code slightly.
(issue #85)
Added explicit widths to the 6502 vectors.
Two changes to Apple II hi-res visualization:
(1) Allow the row stride to be any value >= 1. This is useful
when data is stored in column-major order, i.e. it's a two-byte-wide
shape, with all of the data for the first column stored before the
data for the second column. (Set the row stride to 1, and the
column stride to the bitmap height.)
(2) Modify the layout of grids (sprite sheets and fonts), so that
we're closer to square when the item counts is low. Otherwise the
thumbnail just looks like a dashed line. (This one is strictly
cosmetic.)
Added a bunch of Applesoft entry points, and updated the F8ROM
definitions.
Added a visualizer for Applesoft shape table shapes that are not part
of an actual shape table.
This experimental feature applied platform symbols to the project,
setting labels where the platform symbol's address matched an internal
address. The feature now applies project symbols as well, and has
been renamed to "apply external symbols".
We now report the number of labels set.
First, make the per-segment comments and notes optional.
Second, add an "offset segment by $0100" feature that tries to shift
each segment forward 256 bytes. Doing so avoids potential ambiguity
with direct page locations.
The 20212-reloc-data test no longer has the per-segment comments.
The "smart" PLP handler tries to recover the flags from an earlier
PHP. The non-smart version just marks all the flags as indeterminate.
This doesn't work well on the 65816 in native mode, because having
the M/X flags in an indeterminate state is rarely what you want.
Code rarely uses PLP to reset the flags to a specific state, preferring
explicit SEP/REP. The analyzer is more likely to get the correct
answer by simply leaving the flags in their prior state.
A test case has been added to 20052-branches-and-banks, which now has
"smart PLP" disabled.
Long operands, such as strings and bulk data, can span multiple lines.
SourceGen wraps them at 64 characters, which is fine for assembly
output but occasionally annoying on screen: if the operand column is
wide enough to show the entire value, the comment column is pushed
pretty far to the right.
This change makes the width configurable, as 32/48/64 characters,
with a pop-up in app settings.
The assemblers are all wired to 64 characters, though we could make
this configurable as well with an assembler-specific setting.
Some things have moved around a bit in app settings. The Asm Config
tab now comes last. Having it sandwiched in the middle of tabs that
altered the on-screen display didn't make much sense. The Display
Format is now explicitly for opcodes and operands, and is split into
two columns. The left column is managed by the "quick set" feature,
the right column is independent.
Another chapter in the never-ending AppDomain security saga.
If a computer goes to sleep while SourceGen is running with a project
open, life gets confusing when the system wakes up. The keep-alive
timer fires and a ping is sent to the remote AppDomain, successfully.
At the same time, the lease expires on the remote side, and the objects
are discarded (apparently without bothering to query the ILease object).
This failure mode is 100% repeatable.
Since we can't prevent sandbox objects from disappearing, we have to
detect and recover from the problem. Fortunately we don't keep any
necessary state on the plugin side, so we can just tear the whole
thing down and recreate it.
The various methods in ScriptManager now do a "health check" before
making calls into the plugin AppDomain. If the ping attempt fails,
the AppDomain is "rebooted" by destroying it and creating a new one,
reloading all plugins that were in there before. The plugin binaries
*should* still be in the PluginDllCache directory since the ping failure
was due to objects being discarded, not AppDomain shutdown, and Windows
doesn't let you mess with files that hold executable code.
A new "reboot security sandbox" option has been added to the DEBUG
menu to facilitate testing.
The PluginManager's Ping() method gets called more often, but not to
the extent that performance will be affected.
This change also adds a finalizer to DisasmProject, since we're relying
on it to shut down the ScriptManager, and it's relying on callers to
invoke its cleanup function. The finalizer throws an assertion if the
cleanup function doesn't get called.
(Issue #82)
Changed "Use Keep-Alive Hack" to "Disable Keep-Alive Hack" to emphasize
that it defaults to enabled. Added a menu item for "Disable Security
Sandbox". Added a warning to both that tells the user that they must
reopen the current project for the change to take effect.
Note neither of these is persisted in app settings.
The new name is more indicative of the purpose of the directory.
Updated the docs to point out that you can delete the contents any
time you want, so long as SourceGen isn't running at the time.
Also, change the default column widths for the exporter.
