them in under src/emucore/m6502/src, and bspf under that again at
bspf/src. It just made searching for classes that much harder.
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get nearly enough attention. This is about to change, since I'm moving
to using it full time at work (still Linux at home though!).
The 'Control' key modifier for OSX is now the actual Control key, just like
on every other platform (instead of Command). The 'Alt' key modifier for
OSX is now the Command key (instead of Shift-Cmd). Maybe in the past it
made sense for this, when keyboards weren't the same between platforms, but
that's no longer the case. And since Stella requires at least OSX 10.4,
everyone using it from this point on probably has newer hardware.
Still TODO is consider a few special keys for OSX (minimize, hide, etc).
Updated documentation for new key combos, as well as the recent build
and debugger improvements.
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or newer. Obviously, this one only runs on x86 machines. It's compiled
with the very latest compiler (Clang), which is much faster at compiling
as well as runtime. And it also includes a 64-bit version, which is
only available on Snow Leopard. The old build environment support 32-bit
in 10.4, 10.5 and 10.6 for PPC and Intel.
Fixed string overflow in reading settings from plist file in OSX. I need
to figure out how to use C++ code from within Objective-C, since the
cause of the bug was C string code (which is notorious for buffer
overruns).
Bumped version # to test2, for some testers on AtariAge.
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properly distinguishes between intermediate reads which are part of writes,
and ordinary reads. In the former case, only a read which has a different
address than a write is flagged as an error; intermediate reads acting on
the same address as the corresponding write are considered normal, and won't
trigger a break.
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controlled by 'tiafloat', which has now been removed. Now, all
undriven pins take on the last value on the databus. This fixes a bug
in those reads where bit 6 or bits 6 & 7 are also undriven (previously,
these bits would always be zero, and only bits 0-5 were from lastdatabus.
Added new commandline argument 'tiadriven', which defaults to false.
In this default case, relevant bits take on values from the databus.
If true, relevant bits still take on databus values, but some are
randomly driven high as well. This helps to expose bugs when
developers assume the values for undriven/floating bits.
Added 'uimessages' commandline argument and associated UI item. When
disabled, messages which are normally shown in-game are disabled.
Certain messages which indicate a serious error are still shown, however.
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Fixed BSPF_ARCH macro to correctly detect i386 and x86_64 in Windows.
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version and SDL library.
Bumped version # for test builds for AtariAge members.
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breaks to test whether an illegal read to the write port of cartridge
RAM has occurred. It can be used as follows:
breakif {_rwport == 100} // break if read was done at wport address 100
breakif {_rwport} // break if read was done at *any* wport address
This currently works for all extended RAM carts that worked before.
Specifically, 4A50, DPC, AR and possibly several others aren't supported
yet. More testing is required.
Renamed CartFASC and CartMB to CartFA and CartF0, respectively. This
naming now matches that used in other emulators.
CartMC now properly handles read from write port, by using random
values instead of just zero. However, no test ROMs are available for
this scheme, so there may still be issues.
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The values written and returned in such a case are now more accurate,
and are a combination of the previous databus value and randomization
(the latter emulating the randomness of Z-state bits). This provides
more accurate emulation than before, where zeros were used instead.
In particular, types 3E and E7 are now working correctly for the first
time. Thanks to Batari for suggestions in this area.
Moved random number generation from Cartridge to System class.
The Subversion build number is now shown in the AboutDialog box.
Still TODO is add architecture information (i386, x86_64, etc).
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was duplicate code in many Cart classes and in M6532 class, and since all
these classes are subclasses of Device, it made sense to move the
functionality there instead.
Carts 3E and E7 now return a random value when attempting to read from
the write port. Still TODO is determine what happens to the value at
that address (is it randomized or zeroed?). Thanks to Batari for
suggestions and sample code.
Fixed bug in E7 carts when entering the debugger; bankswitch was being
inadvertantly triggered which caused emulation to fail.
Overall, I need to figure out exactly what happens when reading from
the write port for all carts with extended RAM. There are two things
to consider: what value is written to the address, and what value
is returned.
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that will be in the next release (ppc32, i386, x86_64).
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determining whether we're running in 32 or 64-bit mode on a particular
system (especially in OSX, where the same app could contain up to 4 actual
builds).
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Leopard (10.6). From this point on, the lowest supported version is
OSX 10.4.
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objects. These actions are tied to the same keys as for toggling the
objects themselves, with the addition of the 'Shift' key. For example,
toggling the P0 object is 'Alt z', and toggling P0 collisions is
'Shift-Alt z'. Note that disabling an object will obviously disable
its collisions as well. Still TODO is work out how these keys map on
OSX; the Shift key is already being used for something else.
Reverted Cosmic Ark 'starfield effect' to match the descriptions
given in the 'Stella 3.0 released' thread on AtariAge. It seems the
system I tested this on has an Svideo mod board that changes the
output from a normal console.
Bumped state file format header, since the TIA internals have changed
again. As well, bumped version # to 3.1_svn.
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better viewing in OSX default text editor.
Added build script and template DMG to automatically build a
StellaOSXver.dmg file.
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Updated the documentation for build info for Windows. Still TODO is add more detailed info for Linux and OSX.
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debugger disassembly improvements, so it will have to wait until 3.1.
Updated various files for impending 3.0 release.
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selects the item that was previously selected.
Fixed bug in Cheat dialog where editing a cheat didn't remove the old one.
Updated TODO, rearranging improved disassembly as the #1 priority for the
next release; I don't have time to finish it now.
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all graphical objects in different colors in fixed debug colors mode,
even those that normally share a color register (ie, P0/M0, P1/M1, etc).
Removed TIA::updateFrameScanline, an unwieldy 600+ line function. It
was useful as an optimization measure when Stella was first written,
but at this point I think it's more trouble than it's worth. Removing
the code not only makes the TIA class much smaller and easier to
understand, it also fixes some graphical bugs in fixed debug colors
mode (bugs that probably wouldn't have been found otherwise). Next on
the chopping block are the various 'masks', or at least the alignments
(which cause the arrays to be 4 times larger than they need to be).
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normal scan. Previously, the blanking was done each frame, but the new
way more accurately emulates what happens on a real system.
Added a few tweaks for the properties database.
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where it more properly belongs. The greyed values are now from PAL
color-loss, which is also calculated for NTSC (though it's never actually
used in NTSC mode for regular rendering). This also fixes problems with
debugger state files being saved with greyed values, and sometimes having
the frame greyed twice (hence making it impossible to see). It should
also result in a slight speed increase, since some code has been taken
out of the TIA rendering fast path.
Added electron beam indicator the the TIA output in the debugger.
Basically, it's just a small square indicating where drawing will
start for the next instruction.
Fixed TIA output in the debugger so that right-clicking and selecting
'fill to scanline' actually works without first having to manually
enter partial frame mode.
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in NTSC.
First pass at disassembly of ZP RAM in the debugger UI. For now, the
entire range is disassembled, with no regard for alignment (so the PC
won't necessarily always line up with the disassembly). Also, changes
to RAM don't yet trigger a re-disassembly.
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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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screwed up by my placement of the 'mmr' logic.
Added StayFrosty ROM info to properties database.
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starfield effect. More research is required in this area.
Large update to exception handling throughout the codebase. It seems
that in many cases, the correct 'catch' block was never being called.
I never see exceptions thrown very much, so that area doesn't get much
testing. But I guess it's good that Stella doesn't generate many
exceptions :)
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many more scanlines than a real TV would allow. This fixes both graphical
corruption and slowdowns in Q-Bert ROM (which contains code to do a tight
loop extending VBLANK time, in effect generating a 'frame' with 1000's of
scanlines).
First pass at a method to determine the first 'relevant' scanline of
a TIA frame. This isn't easy, because there are many conditions
for this to occur. The eventual goal is to eliminate Display.YStart
tweaks in the properties file, and have the TIA code itself figure out
the best value.
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stephena