break. First thing to do is update the year. Happy new year to anyone
reading these commit logs.
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will be used, but at least we can improve it a little).
Eliminated the 'alignment' dimension in the various TIATables masks,
reducing the size of the arrays by a factor of 4. I could never
figure out what alignment meant, until I looked at old TIA code in
the repo. It seems that originally, there was an optimization
in the code to fill the array on 32-bit boundaries, instead of the
current 8-bit boundary. As a result, the masks had to be defined
as 32-bits, or 4 groups of 8-bits. Ah, that's where the 'alignment'
comes from.
Related to this, the colors and pointers in the TIA class are now
8-bit as well. Essentially, the TIA class has been doing extra
work to align everything to 32-bit and never actually using the
results. And it's been this way for 4+ years.
Older state files will no longer work, so the version # has been
bumped.
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TODOs and pointed out areas where improvements are likely needed,
in preparation for asking for help in the implementation.
Turned off 'resolvedata' in the debugger when disassembly ZP RAM.
It seems to be buggy in certain cases, and it's easier to just
leave it off in that mode, since (a) not many games run from ZP,
and (b) it's only at most 128 instructions.
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these logs!
Moved TODO and Credits info directly to the webpage, where it will hopefully
be easier to maintain.
Fixed 'crackling' sound when loading a new ROM, introduced with the 3.5
sound restructuring. It looks like stale data was being loaded by the
sound processing callback. As well, moved the computation of certain
division variables from the sound callback to the framerate re-calculator
(where it's recomputed 1/5 of the time or less).
Updated AboutDialog with info about Stella DonationWare status, and active
members of Stella development.
Updated OSX in-app HTML documentation about Stella DonationWare status.
Bumped version # to 3.5.1_svn, and the process starts again.
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in this area.
Added commandline argument 'thumb.trapfatal', which causes fatal errors in
the Thumb ARM emulation to really be treated as fatal (ie, the emulation stops
and throws an exception). This is enabled by default (as it always should be).
When disabled, fatal errors simply log the error and continue with emulation.
This was added because the current HarmonyCart ARM code isn't always exactly
compatible with the emulation in Stella, and there is a lagtime from when
Harmony implements something to when the same functionality is added to Stella.
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don't normally use the commandline (mostly Windows, but in some cases OSX as
well). The 'showinfo' commandline argument has been renamed 'loglevel', but
it has the same purpose. A new option 'logtoconsole' has been added, which
determines whether log output should also be directed to the commandline/
console (previously, it was always printed to the console). All these items
are now accessible from Options -> System Logs.
For anyone reading this (and that cares), now I can finally move on to the
OpenGL rewrite. The plan is that the new code will use OpenGL ES, which
is a subset of OpenGL 1.5. The main advantages are that you won't need
an advanced OpenGL card, and OpenGL ES is supported on most new 'smaller'
systems (iPhone, Android, etc), making ports much easier.
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'Stephen Anthony' (aka, me) in addition to Brad Mott as copyright
holders for Stella. I think I've been with the project long
enough now (almost 10 years) to justify being specifically mentioned
above and beyond 'the Stella Team'.
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The license file is actually named 'License.txt', not 'license'
The 'Stella Team' has a capital T, not lowercase.
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The movement was already correct, but one of the missiles has weird
behaviour caused by 'confusing' the TIA. This results in a four
colour-clock wide missile with the third pixel turned off. I don't
know if this is entirely accurate, but I do know that the snow in
Stay Frosty now looks exactly the same in emulation as is does on a
real system, so I'm content to leave it for now.
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are too invasive to fix right now, and I haven't researched what the
correct route should be. Basically, Stella doesn't properly emulate the
behaviour of writes to RESxx and NUSIZx while graphics are currently
being drawn. The tweaks currently present restore functionality to the
2.8.4 release, but are still incorrect in some ROMs (Bumper Bash and Pole
Position).
Reworked 'object disable' mode in the TIA class. It should now be
slightly faster, and correctly disable objects in all cases
(previously, it was possible for some objects to be enabled depending
on the state of other objects, even when they were specifically
disabled).
Changed NUSIZx descriptors in the debugger to more clearly indicate
what's going on.
Cleaned up TIATable enum's, and eliminated duplication enumerations in
different parts of the codebase.
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emulation when performing 'illegal' HMOVEs (aka, when modifying the HMxx
registers within 24 CPU cycles of HMOVE).
All tweaks for illegal HMOVEs have been removed; and all ROMs that
previously needed those tweaks are now working correctly. Several other
ROMs are fixed as well, including Bumper Bash and Pole Position.
As this is WIP, there is also some breakage:
1) Cosmic Ark 'TIA confusion mode' effects aren't complete; the
movement is correct, but the missile widths aren't corrected yet.
2) Performing a write to NUSIZx while a player is still drawing
isn't complete. This breaks several ROMs that worked before, such
as Galaxian and Space Instigators.
3) Writes to RESPx aren't complete yet, especially if they're
combined with an immediate write to NUSIZx.
Most of the ideas (and some code) for these changes comes from
contributions to MESS and EMU7800. Where applicable, permission
was obtained from the original author to use the code/ideas.
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documentation by using more appropiate variable names.
Added enum's for collision bits to TIATables and TIA classes,
making it easier to visualize what the code is doing.
Fixed poke delay for NUSIZx registers. This fixes display issues
in 'Bumper Bash' and 'Pole Position'. The remaining graphical bugs
in those ROMs is fixed by the new TIA code.
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stephena