byuu says:
Most notable in this release is that sound support has been added to my
own Super Game Boy emulation. The GUI toolkit, phoenix, has also
received a complete rewrite; with the most visible change there being
that windows are now resizable.
Changelog (since v075):
* added sound emulation to Game Boy core
* fixed Super Game Boy save state
* support added HexEdit widget to Windows and Qt targets; debugger can
now be compiled on all platforms
* entering fullscreen now auto-hides mouse; and mouse capture is toggled
otherwise by F12 key
* fullscreen command and geometry caching works much better on GTK+ and
Qt targets
* phoenix rewritten from scratch; now supports resizable layout
containers
* phoenix/Windows no longer relies on buggy SetParent API to reparent
widgets
byuu says:
This has my latest API enhancements, but there are some known issues:
- resize on Windows seems to not repaint the buttons properly in rare
cases. I may just need to revert to flickering resize.
- GTK+ reports the wrong menu height, off by two pixels, prior to the
window being realized (made visible)
- this results in the main window moving up two pixels after each run
of bsnes
The menu height bug was actually there previously, it was just that Qt
and GTK+ were computing the frame margins incorrectly (ignoring the menu
bar) before.
On the bright side, ui/settings/input.cpp has been improved by way of
the new multi-layout support. The window is no longer forced to an
awkward 640 pixels wide, as the mouse axes/buttons can overlap now. The
code is also simpler since I am using the Layout::setVisible command to
toggle groups on and off instead of doing it for each and every control.
byuu says (in the thread about rewriting Phoenix):
- added phoenix/reference; a dummy implementation that contains the 22KB
of static boilerplate code needed to start a new target
- OS::setDefaultFont removed; problem is that objects in the global
scope are constructed before you can call that function
- added Window::setWidgetFont, which is applied if your widgets have no
custom font set already upon attaching them to the window with
Window::setLayout, more understandable behavior
- renamed ListBox to ListView
byuu says (in the v075 WIP thread):
Found the source of lag on cartridge load. ListView::modify() was not
locking Qt messages, so it was causing a CheatEditor::refresh (copies
16MB of memory each call) for all 128 cheat items.
Final issue now is that nested submenus (menus inside of menus) are not
applying Window::setMenuFont yet.
byuu says:
phoenix has been completely rewritten from scratch, and bsnes/ui + bsnes/ui-gameboy have been updated to use the new API. Debugger works too. Currently, only phoenix/Qt is completed, and there are two known issues:
1: font sizes of menu items are wrong, I can fix this easily enough
2: there's some sort of multi-second lag when loading games, not sure
what's happening there yet
The new phoenix isn't exactly complete yet, still making some key
changes, and then I'll start on phoenix/Windows and phoenix/GTK+.
The most noticeable difference is that you don't have to give all of the
header paths and PHOENIX_PLATFORM defines when compiling individual GUI
object files. It's only needed for phoenix.cpp itself. The overall
structure of the phoenix source folder is much saner as well for
sync.sh.
I'm really surprised things are working as well as they are for
a two-day power rewrite of an entire phoenix target. The other targets
won't be as bad insofar as the core stuff is completed this time. And
thank god for that, I was about ready to kill myself after writing
dozens of lines like this:
HorizontalSlider::HorizontalSlider() : state(*new State),
base_from_member<pHorizontalSlider&>(*new pHorizontalSlider(*this)),
Widget(base_from_member<pHorizontalSlider&>::value),
p(base_from_member<pHorizontalSlider&>::value) {}
But each platform does have some new, unique problems. phoenix/GTK+ was
acting screwy prior to the rewrite, and will most likely still have
issues. Even more important, one of the major points of this rewrite was
having the new phoenix/core cache widget settings/data, so that I can
destroy and recreate widgets rather than relying on SetParent. This
means that simple copying of the old phoenix/Windows won't work, and
this new method is significantly more involved.
byuu says:
Rewrote the way menus are attached, they act like layouts/widgets now.
All three phoenix targets once again work with both radio menu items and
radio widgets. Both GTK+ and Qt have built-in group controls right
inside the widgets, so I don't have to keep my own groups around
anymore. They do act screwy at widget creation though, have to jump
through some hoops to get it to work right. All I can say is, definitely
set all child widgets to the parent before trying to check any of them.
My long-term goal for the main window is to honor the fullscreen video
setting as a generic setting, and let the window scale auto-fit the best
possible size that matches your scale preference into the output window,
centered just like fullscreen. For now, I've just set it to a fixed
window size until I finish working on phoenix. The scale X settings will
just be to snap the window to an exact size in case you don't want any
black borders, they won't be radio items and the bsnes-geometry.cfg file
will save width/height information as well.
Simplified the sizing requirements for creating layouts and updated all
bsnes windows to support the new system. Layouts also expose their
minimum width/height values, which I use to create perfectly sized
windows on all three platforms. This will fix cut-off heights on the
last Windows WIP. Qt is being annoying though and forcing a minimum
window size of 300,100 despite me telling it to use a smaller window
size. Always have to fight with Qt, I swear to god.
byuu says:
phoenix/Windows and phoenix/Qt are mostly fully operational now. All
platforms support dynamic layout resizing. I tried WM_GETMINMAXINFO
(thanks, OV2), but it was acting kind of choppy on resize, and it would
get confused and go crazy if you snapped one direction to the minimum
height but not another, so for now I'm leaving it off.
phoenix/GTK+ will be missing some functionality in regards to window
geometry. The other two have a more coherent strategy now: geometry() is
the client area, and setGeometry moves the client area to where you ask
for. This makes truly centering your client area trivial.
frameGeometry() includes the borders, menu and status. There is no
setFrameGeometry(), not sure if I really even want that, but it could be
useful so who knows. All targets also support non-resizable windows.
X11 is of course horrendously poor with frame sizes, Qt and GTK+ don't
even pretend to simulate them, so they say the frame is 0x0 pixels in
size until your widget is fully realized and visible to the end user. So
for now, to get window positioning right, I have to wait until the
window appears and then reposition the window again, causing a slight
jump. My plan is to build some persistent caching support directly into
phoenix. From here, I can just have the window snap the very first time
you run your very first phoenix app. I'll then determine the frame size
information, and use that to create future windows. Once they spawn,
I'll recheck and update the frame size info in case it has changed (eg
user changed themes.) Saving settings into .config/phoenix will allow me
to avoid having to snap the window every time on first startup. If the
config file is missing or unwritable, too bad, happens every time then.
I'm thinking about renaming onResize to onSize, and getting rid of
Window::create(). Rather make it spawn like every other control in its
constructor.
byuu says:
Ported phoenix/Windows and phoenix/GTK+ over to the new system. There
are some problems that need to be addressed:
- Windows ComboBox height setting needs widget creation height to
properly scale itself (make Widget::setGeometry virtual and override
ComboBox::setGeometry)
- Windows Canvas is completely broken
- GTK+ Canvas is slow as shit compared to Qt Canvas, probably nothing
I can do about it, have to do a very costly conversion because GTK+ is
stupid and uses BGR like Nintendo
- GTK+ listboxes are fucking insanely complicated to set up. Currently
I just split the second-half of creation to the setHeaderText call,
but when you don't call that, things explode
- I'm probably going to have to completely destroy and recreate
listboxes when changing the header text / column count
- Qt resize code is still impossible to get right, it's not letting me
size a window > 2/3rds of the screen size (it's in their docs)
- I swear, Qt is the most painful API in the world to move/size
windows with
- now that Window is separate, it really needs geometry() and
frameGeometry() as the two are quite different
- I need a way to toggle window resizability for fixed layouts, Qt is
once again going to be a nightmare as it lacks a way to do this other
than fixed layouts
- GTK+ currently explodes on bsnes, millions of console messages,
wonderful
- plenty more I'm forgetting
One bit of really cool/good news though: I made
Fixed/Horizontal/Vertical layouts external to phoenix itself. The code
is included for all targets so that it's always there and compiled into
one object, but the great news is that you can easily write your own
layout widgets and they'll work on all toolkits instantly.
That resize issue with bsnes was so simple it's annoying: my FixedLayout
container was repositioning on geometry updates. Made it only do it once
at creation like it should.
bsnes now has a fancy resize, grow the window and get black borders,
shrink it and the video shrinks with it. I plan to make it fancier with
constraint settings (center, scale, stretch). Basically I want to turn
the fullscreen setting into a general setting that also applies to
windowed scaling. I will probably turn the video scale X sizes into
regular items instead of radio boxes, so you can easily reset to a fixed
size whenever you want. Update bsnes to remember width,height geometry
as well and it should be quite nice.
byuu says:
Eleven hours of work. Window is now a base type (inherits from Object,
not Widget), same for Layout. FixedLayout still inherits from Layout.
Added HorizontalLayout and VerticalLayout types, that can append each
other to themselves to create box layouts. Layout margins are supported,
spacing is specified inline (I find this a much better way to fine-grain
spacing than Qt's single setSpacing function), and alignment is handled
strictly via padding widgets (insert a zero-sized label and it will
automatically grow to consume all extra space.)
Overall, my box packing model is slightly less powerful than Qt's, but
it is a good deal simpler and and easier to use in 90% of cases. The one
limitation I hit was with my input settings window, I'm not currently
able to embed two different layouts and toggle one on and the other off
to show only either { mouse x-axis, y-axis } or { mouse left, middle,
right }, so they instead just space out differently and I had to grow
the input window width a bit to compensate.
Resizing works great, pretty cool seeing that this is the first time
I've ever written my own resizer. I had to fight with Qt for several
hours to the point of potentially developing an aneurysm, but I finally
got it to properly handle geometry and sizing stuff. Some weird issue
with the bsnes viewport widget, I tell it to resize and for some reason
it doesn't. Cheap hack, I just make it constantly resize every video
refresh and it eventually takes. Wish I knew what was up with that.
All of bsnes now uses dynamic layouts sans the main window, so you can
resize them however you like.
This is still all Qt-only, I'm afraid. The other two ports are
in-progress.
byuu says:
This has the phoenix changes applied. Instead of widgets attaching
directly to windows, you now attach them to layouts, which can then be
attached to windows. Layouts are widgets themselves, so adding layouts
to layouts is trivial. It also allows for multi-widget show/hide, etc.
Right now there is only FixedLayout, but of course the plan is to
support a BoxLayout, that lets you add HorizontalLayout and
VerticalLayout containers to it, thus enabling auto-resize and simpler
form layout.
So far only phoenix/Qt is 100% moved over. phoenix/GTK+ has about 1/3rd
ported, and phoenix/Windows only has one control ported over as
a proof-of-concept.
On the user side, bsnes, bgameboy, snespurify and curse have been moved
to this new layout system. All of bsnes works great with it, as far as
I can tell. Fullscreen, debugger, etc are good.
byuu says:
Removed the floating-point volume adjustments from the wave channel and
the left/right speaker mixers. Also, against my better judgment I'm
backing out of left/right computation when they are both turned off.
This basically makes non-stereo games run faster, but will make stereo
games appear to run slower. I don't like it when end-users experience
mystery slowdowns.
Anyway, it appears that the audio calculation is really fucking
demanding. Knocks FPS from 800 down to 300. I thought it might be libco,
so I took it out and it only went up to 305fps o.O
There is also some sort of problem with bsnes/Super Game Boy audio. The
latency is really great when you first start, but it seems to drift
apart over time until it is well over 500ms, and then it either pops or
fades back to very low, sub-50ms latency again. The way I handle mixing
is that the coprocessor audio samples go into a resampler to the native
SNES rate, and fed to an output buffer. SNES audio samples go there
untouched. When there is a sample in each, I add them together and
average the result (I still don't understand why we divide by two since
these are signed integers), and output it immediately. It's just-in-time
sampling, so as long as DSP v Coprocessor do not drift very far, it
should have very low latency. And I make the CPU sync DSP and
Coprocessor once per scanline, which is something like 15 samples or so.
byuu says:
Added Game Boy sound emulation, all four channels.
It's really, really, really bad. Plenty of bugs, I don't even know what
the fuck a high-pass filter is so that isn't there. Hermite resampling
from 4MHz down to 44KHz. But it's tolerable.
I don't understand what sweep is for at all, and I'm sure I have that
insane recursive reload behavior wrong.
This is pretty much my own design. I referenced blargg's gb snd emu,
blargg's older gb apu ref, Cydrak's APU core, that lousy gbdev wiki
article, the completely and utterly worthless pandocs, and received
nothing but bad and wrong information that just wasted my time from
But I managed to pull it off. It's also painfully slow, like 250fps on
my machine slow. Countless optimizations are possible.
byuu says:
Changelog:
- hooked up everything necessary for Game Boy sound emulation ...
- bgameboy and bsnes/SGB input 4MHz frequency, and output 44.1KHz
frequency (produces soft static for now, to verify it is working)
- rewrote all of gameboy/apu, it now has a 4MHz worker thread, and
separate classes/folders for each channel+master, and serializes
So it's basically all I can do without actual emulation code or
human-readable documentation/example code.
byuu says:
Changelog:
- added full HexEditor widget to phoenix/Qt (has dynamic scrollbar like
phoenix/GTK, but does not yet support page up/down scrolling)
- optimized debugger to look great with either phoenix/GTK or phoenix/Qt
- fixed phoenix/Qt fullscreen mode (had to allow resizing of the layout,
and resize the container)
- fixed phoenix/Qt Window::setBackgroundColor() bug that was making
statusbar invisible
- entering fullscreen now captures mouse, leaving fullscreen releases it
- so by default, no cursor in fullscreen mode now
- F12 key was assigned the task of toggling mouse capture,
Tools->Capture Mouse was removed
- above change allows toggling mouse capture in fullscreen if you like
It wasn't my idea, but toggling the mouse capture in fullscreen also hiding the mouse cursor is what I call genius design. Two birds with one stone, and very intuitive.
Also, the default GUI on Linux for bsnes and bgameboy is now Qt, instead
of GTK+. I did this because Qt's fullscreen is far more stable, and
I fixed up the remaining bugs anyway.
byuu says:
Changelog:
- added ui-libsnes directory back into source archive; make archive-all
includes it now
- added basic HexEditor widget to phoenix/Windows
byuu says:
Changelog:
- fixed Super Game Boy save state support
- both SNES and GameBoy only initialize serialize size on cartridge load
once now, just like I've already done with memory mapping
- added nall/public_cast.hpp for fun ... don't worry, I'm never actually
going to use it in production code :D
byuu says:
This release brings improved Super Game Boy emulation, the final SHA256
hashes for the DSP-(1,1B,2,3,4) and ST-(0010,0011) coprocessors, user
interface improvements, and major internal code restructuring.
Changelog (since v074):
- completely rewrote memory sub-system to support 1-byte granularity in
XML mapping
- removed Memory inheritance and MMIO class completely, any address can
be mapped to any function now
- SuperFX: removed SuperFXBus : Bus, now implemented manually
- SA-1: removed SA1Bus : Bus, now implemented manually
- entire bus mapping is now static, happens once on cartridge load
- as a result, read/write handlers now handle MMC mapping; slower
average case, far faster worst case
- namespace memory is no more, RAM arrays are stored inside the chips
they are owned by now
- GameBoy: improved CPU HALT emulation, fixes Zelda: Link's Awakening
scrolling
- GameBoy: added serial emulation (cannot connect to another GB yet),
fixes Shin Megami Tensei - Devichil
- GameBoy: improved LCD STAT emulation, fixes Sagaia
- ui: added fullscreen support (F11 key), video settings allows for
three scale settings
- ui: fixed brightness, contrast, gamma, audio volume, input frequency
values on program startup
- ui: since Qt is dead, config file becomes bsnes.cfg once again
- Super Game Boy: you can now load the BIOS without a game inserted to
see a pretty white box
- ui-gameboy: can be built without SNES components now
- libsnes: now a UI target, compile with 'make ui=ui-libsnes'
- libsnes: added WRAM, APURAM, VRAM, OAM, CGRAM access (cheat search,
etc)
- source: removed launcher/, as the Qt port is now gone
- source: Makefile restructuring to better support new ui targets
- source: lots of other internal code cleanup work
byuu says:
Changelog:
- debugger compiles on all three profiles
- libsnes compiles on all three platforms (no API changes to libsnes)
- memory.cpp : namespace memory removed (wram -> cpu, apuram -> smp,
vram, oam, cgram -> ppu)
- sa1.cpp : namespace memory removed (SA-1 specific functions merged
inline to SA1::bus_read,write)
- GameBoy: added serial link support with interrupts and proper 8192hz
timing, but obviously it acts as if no other GB is connected to it
- GameBoy: added STAT OAM interrupt, and better STAT d1,d0 mode values
- UI: since Qt is dead, I've renamed the config files back to bsnes.cfg
and bsnes-geometry.cfg
- SA1: IRAM was not syncing to CPU on SA-1 side
- PPU/Accuracy and PPU/Performance needed Sprite oam renamed to Sprite
sprite; so that I could add uint8 oam[544]
- makes more sense anyway, OAM = object attribute memory, obj or
sprite are better names for Sprite rendering class
- more cleanup
byuu says:
Major WIP, countless changes. I really went to town on cleaning up the
source today with all kinds of new ideas. I'll post the ones I remember,
use diff -ru to get the rest.
What I like the most is my new within template:
template<unsigned lo, unsigned hi>
alwaysinline bool within(unsigned addr) {
static const unsigned mask = ~(hi ^ lo);
return (addr & mask) == lo;
}
Before, you would see code like this:
if((addr & 0xe0e000) == 0x206000) { //$20-3f:6000-7fff
The comment is basically necessary, and you have to trust that the mask
is right, or do the math yourself.
Now, it looks like this:
if(within<0x20, 0x3f, 0x6000, 0x7fff>(addr)) {
That's the same as within<0x206000, 0x3f7fff>, I just made an
SNES-variant to more closely simulate my XML mapping style:
20-3f:6000-7fff.
Now obviously this has limitations, it only works in base-2 and it can't
manage some tricky edge cases like (addr & 0x408000) == 0x008000 for
00-3f|80-bf:8000-ffff. But for the most part, I'll be using this where
I can. The Game Boy is fully ported over to it (via the MBCs), but the
SNES only has the BS-X town cartridge moved over so far. SuperFX and
SA-1 at the very least could benefit.
Next up, since the memory map is now static, there's really no reason to
remap the entire thing at power-on and reset. So it is now set up at
cartridge load and that's it. I moved the CPU/PPU/WRAM mapping out of
memory.cpp and into their respective processors. A bit of duplication
only because there are multiple processor cores for the different
profiles, but I'm not worried about that. This is also going to be
necessary to fix the debugger.
Next, Coprocessor::enable() actually does what I initially intended it
to now: it is called once to turn a chip on after cartridge load. It's
not called on power cycle anymore. This should help fix power-cycle on
my serial simulation code, and was needed to map the bus exactly one
time. Although most stuff is mapped through XML, some chips still need
some manual hooks for monitoring and such (eg S-DD1.)
Next, I've started killing off memory::, it was initially an
over-reaction to the question of where to put APURAM (in the SMP or
DSP?). The idea was to have this namespace that contained all memory for
everything. But it was very annoying and tedious, and various chips
ignored the convention anyway like ST-0011 RAM, which couldn't work
anyway since it is natively uint16 and not uint8. Cx4 will need 24-bit
RAM eventually, too. There's 8->24-bit functions in there now, because
the HLE code is hideous.
So far, all the cartridge.cpp memory:: types have been destroyed.
memory::cartrom, memory::cartram become cartridge.rom and cartridge.ram.
memory::cartrtc was moved into the SRTC and SPC7110 classes directly.
memory::bsxflash was moved into BSXFlash. memory::bsxram and
memory::bsxpram were moved into BSXCartridge (the town cartridge).
memory::st[AB](rom|ram) were moved into a new area,
snes/chip/sufamiturbo. The snes/chip moniker really doesn't work so
well, since it also has base units, and the serial communications stuff
which is through the controller port, but oh well, now it also has the
base structure for the Sufami Turbo cartridge too. So now we have
sufamiturbo.slotA.rom, sufamiturbo.slotB.ram, etc.
Next, the ST-0010/ST-0011 actually save the data RAM to disk. This
wasn't at all compatible with my old system, and I didn't want to keep
adding memory types to check inside the main UI cartridge RAM loading
and saving routines.
So I built a NonVolatileRAM vector inside SNES::Cartridge, and any chip
that has memory it wants to save and load from disk can append onto it
: data, size, id ("srm", "rtc", "nec", etc) and slot (0 = cartridge,
1 = slot A, 2 = slot B)
To load and save memory, we just do a simple: foreach(memory,
SNES::cartridge.nvram) load/saveMemory(memory).
As a result, you can now keep your save games in F1 Race of Champions II
and Hayazashi Nidan Morita Shougi. Technically I think Metal Combat
should work this way as well, having the RAM being part of the chip
itself, but for now that chip just writes directly into cartridge.ram,
so it also technically saves to disk for now.
To avoid a potential conflict with a manipulated memory map, BS-X SRAM
and PSRAM are now .bss and .bsp, and not .srm and .psr. Honestly I don't
like .srm as an extension either, but it doesn't bother me enough to
break save RAM compatibility with other emulators, so don't worry about
that changing.
I finally killed off MappedRAM initializing size to ~0 (-1U). A size of
zero means there is no memory there just the same. This was an old
holdover for handling MMIO mapping, if I recall correctly. Something
about a size of zero on MMIO-Memory objects causing it to wrap the
address, so ~0 would let it map direct addresses ... or something.
Whatever, that's not needed at all anymore.
BSXBase becomes BSXSatellaview, and I've defaulted the device to being
attached since it won't affect non-BSX games anyway. Eventually the GUI
needs to make that an option. BSXCart becomes BSXCartridge. BSXFlash
remains unchanged.
I probably need to make Coprocessor::disable() functions now to free up
memory on unload, but it shouldn't hurt anything the way it is.
libsnes is most definitely broken to all hell and back now, and the
debugger is still shot. I suppose we'll need some tricky code to work
with the old ID system, and we'll need to add some more IDs for the new
memory types.
byuu says:
This WIP fixes up the last bit from the old memory mapping system, the
BS-X Satellaview town cartridge now has a static memory mapper that is
dynamically decoded based on register settings. Tested with BS Town + BS
Zelda, and I can get in-game just fine. The mapping code is actually
a lot more readable this way, too.
byuu says:
The nall::function binding for the memory map apparently breaks when the
debugger is enabled, as PPU:: becomes PPUdebugger::, etc; and C++ isn't
smart enough to upconvert for us.
Not sure how I am going to work around that yet ...
Changelog:
- improved GameBoy::CPU::Halt emulation, fixes Legend of Zelda intro
water+world-map scrolling at the same time
- added GameBoy::APU skeleton, and hooked up MMIO read/write for all
registers
- modified nall integer->string functions
byuu says:
Fullscreen works on all ports, but Qt is in general pretty wonky at the
moment. Don't really care right now.
F11 toggles fullscreen, there is no menu or status in fullscreen, and it
auto-scales to the highest even multiple that it can.
It copies all other settings (filter, shader, aspect correction, video
region, vsync, async) from your windowed mode settings.
You cannot enable the menu or status bars, because those are a major
pain in the ass to support with both GTK+ and Qt returning nonsense
geometries.
Combine with each platform treating whether or not to handle menus
and/or statuses as part of the geometry or not, and it's a recipe for
pain.
It is pseudo-fullscreen for now, but if we have some spiffy code in the
future to set a true fullscreen that works on Linux (and hopefully OS
X), I'll add a true-FS option to ruby later.
byuu says:
This WIP uses the 16MB+64MB memory tables for 1:1 mapping of the S-CPU
bus.
Minimum RAM requirement goes up to 128MB, dare I be bold here and
recommend you have 256MB.
I also hooked up the basic bindings for making pseudo-fullscreen windows
in phoenix/Windows and phoenix/GTK+, but both have some serious issues.
- GTK+ won't resize my form container, even though it's the same code
I used successfully in bsnes v039 and prior with hiro
- Windows scale selection breaks the faux-fullscreen effects
- I am intending to write off the menu/status bars and just auto-size
the video to fill the screen, nice and simple
byuu says:
Oh good, that turned out to be a lot easier than I expected.
Almost all of the work was already done yesterday in porting the SA-1
over to a static map.
byuu says:
SuperFXBus was inheriting from Bus, in other words using a copy of the
same memory mapping subsystem.
I've removed that and made it a simple mask, since only ROM+RAM are
mapped there.
byuu says:
You guys are going to hate the hell out of this one. It's twenty hours
of non-stop work, no exaggeration at all. Started at 4AM, just wrapped
up now at 8PM.
I rewrote the entire memory subsystem.
Old system:
65536 pages that map 256 bytes each
Mapping a new page overwrites old page
Granularity capped at 256 bytes minimum, requiring ST-001x to map
60:0000-00ff instead of 60:0000,0001
Classes inherit from MMIO and Memory, forcing only one mappable function
per class, and fixed names
MMIO sub-mapper inside memory: 00-3f:2000-5fff for one-byte granularity
Can dynamically change the map at run-time, MMC register settings
perform dynamic remapping
New system:
XML mapping is still based around banklo-bankhi:addrlo-addrhi, as that
shapes almost everything on the SNES very well
Internally, 2048 pages that map 8192 bytes each
Pages are vectors, scans O(n) from last to first (O(log n) would not
help, n is never > 3)
Can multi-cast writes, but not reads [for the obvious reason of: which
read do you return?]
Can map reads and writes separately
Granularity of one for entire 24-bit address range, no need for MMIO
- whatever is in XML is exactly what you get
Read/Write tables bind function callbacks, so I can have any number of
functions with any names from any classes with no inheritance (no
more uPD7725DR, uPD7725SR helpers, etc)
Less memory usage overall due to less tables [ I tried 16 million tables
and it used 2GB of RAM >_o ]
Cannot dynamically change the map at run-time, MMC read/write functions
perform address translation [worse average case speed, better worst
case speed]
Now the hate me part, functors can't beat virtual functions for speed.
There are speed penalties involved:
-4.5% on average games
-11% on SuperFX games (SFX has its own bus)
-15% on SA-1 games (SA-1 has two buses)
Of course the two that need the speed the most get the biggest hits.
I'm afraid there's really not a lot of wiggle room to boost speed back
up.
I suppose one bright spot is that we can much more easily try out
entirely new mapping systems now, since the dynamic portions have been
eliminated.
byuu says:
Changelog:
- updated/fixed st0011.bin SHA256 sum
- removed launcher/
- building ui-gameboy only builds the Game Boy core, not the SNES core
- binary name output is bgameboy for ui-gameboy
- make install/make uninstall work as expected with the extra data files
[Editor's note - those last three changes seem to have been made in
v074r01]
byuu says:
Changelog:
- fixed libsnes to compile again, the GB RTC constant is there but
doesn't do anything just yet (no serialize support in GameBoy core)
- libsnes: added SNES_MEMORY_(WRAM,APURAM,VRAM,OAM,CGRAM) -- really only
for the first one, it allows libsnes users to implement their own
cheat search
- you can now load the SGB BIOS without a game!! please be sure to enjoy
the blinking cartridge icon emulation :D
- necdsp (uPD7725,96050) - simplified code a bit: removed persistent
regs.idb, simplified jumps, merged exec() with main loop, etc.
- nall::function - fixed an initialization bug when copy-constructing
objects
- nall::vector - use calloc instead of malloc to help safeguard against
uninitialized class data (potentially hides errors, but better than
crashing in production)
byuu says (since v073):
This release adds full low-level emulation of the NEC uPD96050
coprocessor, used by the ST-0010 (F1 Race of Champions II) and the
ST-0011 (Hayazashi Nidan Morita Shougi). The former was already playable
with HLE, but lacked timing emulation. The latter has never been
playable through emulation before now. But as with SD Gundam GX before,
you really weren't missing much.
[...]
Also new in this release is my own Game Boy emulator. It is being used
to provide native Super Game Boy support, built directly into bsnes.
This core is released under the GPLv2, but I am willing to grant a more
permissive license for other SNES emulators, if anyone is interested.
Of course I cannot compete with the quality of gambatte, and certainly
not from only a weeks' worth of work. Currently, there is no Game
Boy-side sound output and there are quite a few bugs remaining in its
emulation core. I would appreciate any help on this, the Game Boy is not
my forte. So yes, we are taking a step back today, so that we may take
two steps forward in the future.
[...]
Lastly, the debugger is still Linux-only, but it is now stable enough to
be considered usable. Check it out if you like, compile with -DDEBUGGER
to enable it.
byuu says:
I give up for now. This WIP doesn't really improve uPD any, but it does
have major fixes to the debugger.
Debugger is still Linux-only for want of a HexEditor widget, but the
Linux one is now usable.
Before it'd trace and search for breakpoint at sub-1fps. Fixed it to not
break out of core for simple things and it'll run at near-fullspeed for
BPs, half-speed for tracing to file (lots of I/O.)
byuu says:
Above WIP will automatically map in the ST-001x chips, no need for an
XML file.
F1 Race of Champions II (J) is fully playable, at least. It's forced to
15MHz like the ST-0011 for now.
The core (snes/chip/necdsp/core) is somewhat unstable at the moment,
some debugging hooks commented out and some hacks / ideas floating
around in there. Disassembler can't handle long jumps yet.
Added uPD96050 emulation, but it's not working right now. I'm totally
stumped. The ST-0010 player cars aren't moving right, and it crashes
sometimes on exit like it's going out of bounds.
I had decided to try and avoid duplicating the 20KB uPD7725 core, so
I made a new folder:
snes/chip/necdsp
snes/chip/necdsp/upd7725
snes/chip/necdsp/upd96050
The latter two derive from the former, and they specify the PC, RP and
DP sizes, which allocates appropriate memory.
I use simple runtime-masked registers (to avoid template hell on every
uPDcore function), and then I derive from that to complete each actual
DSP. The uPD7725 seems to work great, but the uPD96050 is fucked and
I don't know why :(
Help would be appreciated, it must be something simple because I am
certain the cars were working before.
Kinda wish I didn't scrap the old code now :(
I've merged the bgameboy GUI into the bsnes project, as it's only ~3KB
and it means I don't have to keep manually editing and copying two
projects around. You can set ui := ui-gameboy to build bgameboy as
a standalone, and ui := ui to build the bsnes you are used to. I will be
polishing it to allow changing the binary output name, not building the
SNES portions when not needed, etc in time.
So that'll end bgameboy standalone releases, at least for now. If it
ever gets important enough to split back out again I can, but I prefer
it this way. bgameboy was never meant to be mainstream anyway, just
a component for bsnes.
byuu says:
Changelog:
- much tighter SGB integration, but this is still a work-in-progress
- memory::gb(rom,ram,rtc) is gone, uses GameBoy:: memory structures
directly (a big gain, no need to copy memory to save and load)
- UI-based cartridge loading works with GameBoy:: directly as well
- libsnes will need to be updated internally to reflect this
- games can save and load (even before bgameboy can, hah)
- save states hooked up, but they crash the DMG. I don't know why, as
if it was hard enough saving states with libco, try doing it for an
emulator inside an emulator >_<
- last remnants of old SGB stuff removed, <sueprgameboy> XML converted
to <icd2>
- looks like the XML list idea is looking pretty useless for
SNES::Cartridge now that bgameboy handles its own XML mapping
byuu says:
Changelog:
- removed bsnes/supergameboy (libgameboy -> libgambatte binding)
- added direct ICD2-R coprocessor emulation
- linked in bgameboy to the ICD2-R module
- Makefile removes -Isnes, all files adjusted from <name.hpp> to
<snes/name.hpp> [relic from asnes split]
You can now play Super Game Boy games with the core bsnes library.
byuu says:
Changelog:
- adds XML memory mapping to cartridge loading;
nall/gameboy/cartridge.hpp will bullshit one for now
- still need to add proper MMM01 detection (menu code goes at end of ROM
apparently)
- added save state support, which works here (but not inside bsnes, go
figure), to aid in debugging. Expect constant changes for now a long
while, it's way too early to add states
byuu says:
Changelog:
- fixed LYC interrupt at LY=0 (fixes Makai Toushi SaGa)
- fixed MBC3 ROM bank mapping (fixes Harvest Moon GBC)
- added Super Game Boy MLT_REQ support to JOYP, needed for ICD2-R emulation
- temporarily changed System::run() to execute only four cycles before
exiting for bsnes, will make two versions later
- uses actual boot ROMs, has DMG+SGB1 for now. Need SGB2, don't care
about CGB. Defaults to SGB1, no way to select just yet. DMG 4-second
wait is annoying. Does not force games to act like SGB on bgameboy
itself, because that has no ICD2 and fails the required MLT_REQ check
byuu says:
Changelog:
- added skeleton HuC1 (gets to a menu)
- added skeleton HuC3 (gets to a menu, this one is supposedly a lot more
complex (IR, RTC, etc.))
- added MMM01 emulation
byuu says:
Changelog:
- rewrote sprite rendering, grabs first ten sprites, draws them in
revere order of a: X-index, b: OAM appearance order
- simplified tile decoding to use less variables
- added MBC3 emulation (for now, RTC is always enabled)
- STOP can be broken via joypad IF, this may not be correct though (it
may trigger even without P10-13 being modified)
- cleaned up all MBC emulation to use masks instead of ranges
- MBC2 uses 512-byte table now, ignores high 4-bits. Easier this way I guess
- tools menu temporarily has a console tracer enable option
- some other stuff
No real visible improvements :(
byuu says:
Changelog:
- fixed sprite Vflip check
- fixed up window rendering (well, mostly, works great in Megaman II but
not so great in Makaitoushi SaGa)
- added MBC2, MBC5 (already had MBC0, MBC1)
- removed reset, hooked up power cycle and Vsync toggle
- some other stuff
Makaitoushi SaGa locks on the main menu after some graphical glitches on
the title screen, damn.
Shin Megami Tensei - Devichil Black Book locks up immediately, hitting
HALT opcodes all the time, damn again.
Megaman II should be fully playable now.
Contra 3 is really close, but goes crazy on the turtle boss fight.
byuu says:
Added MBC1 emulation, although battery RAM doesn't save or load to disk
yet.
Made up a fake MBC0 which is really just saying 'no MBC', for consistent
handling of all MBCs.
Added bumpers to stop ROM/RAM out of bounds accesses.
Added STAT interrupts for LY coincidence, Vblank and Hblank (not for OAM
access yet, I don't know the timings.)
Fixed timer interrupt [Jonas Quinn]
Made all interrupts call a CPU function instead of just setting a flag
for better control (to allow below addition.)
Added HALT and STOP emulation, the latter permanently locks the Game Boy
for now. The former breaks on interrupts.
Rewrote all the rendering code to suck 50% less, though it's still
absolutely miserable and scanline-based.
Added pixel-level horizontal scrolling to BGs.
Fixed OBJ rendering error that was making them render upside down (I was
flipping to compensate before.)
Added OBJ 8x16 mode.
Added OBJ priority support.
Added window (but it's broken to all hell on Mega Man II.)
byuu says:
Fixed all of the previously mentioned problems by myself and Jonas
Quinn.
Fixed up JOYP and hooked up JOYP interrupts, they work on JOYP writes as
well if your selection makes the low four bits change to != 0xF.
Added basic sprite emulation, very very very lousy but it works for
Tetris.
Fixed DAA, fuck that opcode. Fixes blargg's CPU tests 1 and 11 (for some
odd reason.) Only test 2 is failing, on the "EI" test. Maybe it relies
on STAT interrupts?
Did some other stuff.
Tetris is now 100% fully playable. But that renderer is an abomination.
Soooooo simplistic and missing so many edge cases.
But holy shit, a fully playable commercial game in three days. I would
have killed to have made that progress when I started on bsnes.
byuu says:
All 512 instructions implemented. To make debugging flags easier and to
reduce the code size, I made parent routines for all the bit-logic that
sets flags. This bumped up the speed to 3,045fps. So about 51x faster
than a real Game Boy.
I suspect the frame rate to plummet rapidly as I emulate more stuff and
try and get timings more accurate. Wild ballpark, I'd guess 300fps or
so. Not based on anything, just a made up number. I have no idea what it
will end up being.
So I still need:
* decode MMIO reads/writes
* add CPU interrupt support
* add LCD emulation (probably the hardest part)
* add PCM emulation (well, this would likely be the hardest; but it's
not essential right now)
* debug the holy living shit out of the CPU core. Anyone want to help
now by looking it over? :D
byuu says:
314 of 512 opcodes implemented, can execute the first 67,450
instructions of Tetris.
I also added an MMIO bus, ala bsnes, so that I can map and access
individual registers with a single indirection.
byuu says:
Hooked up a scheduler to enter/exit the CPU core wherever I want. Added
basic 4*1024*1024hz clock, and about eleven or so opcodes. Creating the
disassembler as I encounter each new opcode, not skipping ahead to do
all 'like other' opcodes, eg if I add 'dec b', I don't then add 'dec c'
until I encounter it.
The source tarball also included empty obj/ and out/ directories which
git does not support.
byuu says:
Project started, so basically everything is new.
It's basically a rough skeleton that mimics bsnes project structure.
Eventually the src/gameboy folder will be copied into bsnes-official and
used by the chip/supergameboy core.
The middleware layer (supergameboy/interface) will be merged into a new
chip/icd2 folder that will represent direct Super Game Boy emulation in
the future.
At least, if all goes according to plan.
There is a simple GUI that can load ROMs, but do nothing after it. It's
not hooked up to ruby yet.
There is a basic system class and interface to expose the
video/audio/input functions.
There is a basic memory bus that doesn't support any MBCs yet.
There is a CPU skeleton that only handles easy read/write access to the
CPU registers (AF is a really fucked up register.)
The core is not hooked up to libco yet, but I intend for it to be, so
that I can run the CPU + LCD how I like.
If it turns out the LCD+audio is easily enslavable, then I'll probably
drop libco and just run it like a regular emulator, using a thread
wrapper around it in bsnes only. We'll see.
The CPU doesn't actually support any opcodes, and loading a ROM won't
actually execute anything.
byuu says:
While perhaps not perfect, pretty good is better than nothing ... I've
added emulation of auto-joypad poll timing.
Going off ikari_01's confirmation of what we suspected, that the strobe
happens every 256 clocks, I've set up emulation as follows:
Upon reset, our clock counter is reset to zero.
At the start of each frame, our poll counter is reset to zero.
Every 256 clocks, we call the step_auto_joypad_poll() function.
If we are at V=225/240+ (based on overscan setting), we check the poll
counter.
At zero, we poll the actual controller and set the joypad polling flag
in $4212.d0 to 1.
From zero through fifteen, we read in one bit for each controller and
shift it into the register.
At sixteen, we turn off the joypad polling flag.
The 256-clock divider allows the start point of polling for each frame
to fluctuate wildly like real hardware.
I count regardless of auto joypad enable, as per $4212.d0's behavior;
but only poll when it's actually enabled.
I do not consume any actual time from this polling. I honestly don't
know if I even should, or if it manages to do it in the background.
If it should consume time, then this most likely happens between opcode
edges and we'll have to adjust the code a good bit.
All commercial games should continue to work fine, but this will likely
break some hacks/translations not tested on hardware.
Without the timing emulation, reading $4218-421f before V=~228 would
basically give you the valid input controller values of the previous
frame.
Now, like hardware, it should give you a state that is part previous
frame, part current frame shifted into it. Button positions won't be
reliable and will shift every 256 clocks.
I've also removed the Qt GUI, and renamed ui-phoenix to just ui. This
removes 400kb of source code (phoenix is a lean 130kb), and drops the
archive size from 564KB to 475KB. Combined with the DSP HLE, and we've
knocked off ~570KB of source cruft from the entire project. I am looking
forward to not having to specify which GUI is included anymore.
Tim Allen