byuu says:
Changelog:
- WS: fixed 8-bit sign-extended imul (fixes Star Hearts completely,
Final Fantasy world map)
- WS: fixed rcl/rcr carry shifting (fixes Crazy Climber, others)
- WS: added sound DMA emulation (Star Hearts rain sound for one example)
- WS: added OAM caching, but it's forced every line for now because
otherwise there are too many sprite glitches
- WS: use headphoneEnable bit instead of speakerEnable bit (fixes muted
audio in games)
- WS: various code cleanups (I/O mapping, audio channel naming, etc)
The hypervoice channel doesn't sound all that great just yet. But I'm
not sure how it's supposed to sound. I need a better example of some
more complex music.
What's left are some unknown register status bits (especially in the
sound area), keypad interrupts, RTC emulation, CPU prefetch emulation.
And then it's all just bugs. Lots and lots of bugs that need to be
fixed.
EDIT: oops, bad typo in the code.
ws/ppu/ppu.cpp line 20: change range(256) to range(224).
Also, delete the r.speed stuff from channel5.cpp to make the rain sound
a lot better in Star Hearts. Apparently that's outdated and not what the
bits really do.
byuu says:
Changelog:
- WS: fixed bug when IRQs triggered during a rep string instruction
- WS: added sprite attribute caching (per-scanline); absolutely massive
speed-up
- WS: emulated limit of 32 sprites per scanline
- WS: emulated the extended PPU register bit behavior based on the
DISP_CTRL tile bit-depth setting
- WS: added "Rotate" key binding; can be used to flip the WS display
between horizontal and vertical in real-time
The prefix emulation may not be 100% hardware-accurate, but the edge
cases should be extreme enough to not come up in the WS library. No way
to get the emulation 100% down without intensive hardware testing.
trap15 pointed me at a workflow diagram for it, but that diagram is
impossible without a magic internal stack frame that grows with every
IRQ, and can thus grow infinitely large.
The rotation thing isn't exactly the most friendly set-up, but oh well.
I'll see about adding a default rotation setting to manifests, so that
games like GunPey can start in the correct orientation. After that, if
the LCD orientation icon turns out to be reliable, then I'll start using
that. But if there are cases where it's not reliable, then I'll leave it
to manual button presses.
Speaking of icons, I'll need a set of icons to render on the screen.
Going to put them to the top right on vertical orientation, and on the
bottom left for horizontal orientation. Just outside of the video
output, of course.
Overall, WS is getting pretty far along, but still some major bugs in
various games. I really need sound emulation, though. Nobody's going to
use this at all without that.
byuu says:
Changelog:
- WS: fixed lods, scas instructions
- WS: implemented missing GRP4 instructions
- WS: fixed transparency for screen one
- WSC: added color-mode PPU rendering
- WS+WSC: added packed pixel mode support
- WS+WSC: added dummy sound register reads/writes
- SFC: added threading to SuperDisc (it's hanging for right now; need to
clear IRQ on $21e2 writes)
SuperDisc Timer and Sound Check were failing before due to not turning
off IRQs on $21e4 clear, so I'm happy that's fixed now.
Riviera starts now, and displays the first intro screen before crashing.
Huge, huge amounts of corrupted graphics, though. This game's really
making me work for it :(
No color games seem fully playable yet, but a lot of monochrome and
color games are now at least showing more intro screen graphics before
dying.
This build defaults to horizontal orientation, but I left the inputs
bound to vertical orientation. Whoops. I still need to implement
a screen flip key binding.
byuu says:
Changelog:
- sfc/ppu/sprite updated to use new .bit(s) functions; masked sizes
better; added valid flags instead of using magic numbers
- ws/ppu updates to use new .bit(s) functions
- ws/ppu: added line compare interrupt support
- added ws/eeprom; emulation of WS/WSC internal EEPROM and cartridge
EEPROM (1kbit - 16kbit supported)
- added basic read/write handlers for remaining WS/WSC PPU registers
WS EEPROM emulation is basically a direct copy of trap15's code. Still
some unknown areas in there, but hopefully it's enough to get further
into games that depend on EEPROM support. Note that you'll have to
manually add the eeprom line to the manifest for now, as icarus doesn't
know how to detect EEPROM/sizes yet.
I figured the changes to the SNES PPU sprites would slow it down a tad,
but it actually sped it up. Most of the impact from the integer classes
are gone now.
byuu says:
I refactored my schedulers. Added about ten lines to each scheduler, and
removed about 100 lines of calling into internal state in the scheduler
for the FC,SFC cores and about 30-40 lines for the other cores. All of
its state is now private.
Also reworked all of the entry points to static auto Enter() and auto
main(). Where Enter() handles all the synchronization stuff, and main()
doesn't need the while(true); loop forcing another layer of indentation
everywhere.
Took a few hours to do, but totally worth it. I'm surprised I didn't do
this sooner.
Also updated icarus gmake install rule to copy over the database.
byuu says:
Nothing WS-related this time.
First, I fixed expansion port device mapping. On first load, it was
mapping the expansion port device too late, so it ended up not taking
effect. I had to spin out the logic for that into
Program::connectDevices(). This was proving to be quite annoying while
testing eBoot (SNES-Hook simulation.)
Second, I fixed the audio->set(Frequency, Latency) functions to take
(uint) parameters from the configuration file, so the weird behavior
around changing settings in the audio panel should hopefully be gone
now.
Third, I rewrote the interface->load,unload functions to call into the
(Emulator)::System::load,unload functions. And I have those call out to
Cartridge::load,unload. Before, this was inverted, and Cartridge::load()
was invoking System::load(), which I felt was kind of backward.
The Super Game Boy really didn't like this change, however. And it took
me a few hours to power through it. Before, I had the Game Boy core
dummying out all the interface->(load,save)Request calls, and having the
SNES core make them for it. This is because the folder paths and IDs
will be different between the two cores.
I've redesigned things so that ICD2's Emulator::Interface overloads
loadRequest and saveRequest, and translates the requests into new
requests for the SuperFamicom core. This allows the Game Boy code to do
its own loading for everything without a bunch of Super Game Boy special
casing, and without any awkwardness around powering on with no cartridge
inserted.
This also lets the SNES side of things simply call into higher-level
GameBoy::interface->load,save(id, stream) functions instead of stabbing
at the raw underlying state inside of various Game Boy core emulation
classes. So things are a lot better abstracted now.
byuu says:
Lots of improvements. We're now able to start executing some V30MZ
instructions. 32 of 256 opcodes implemented so far.
I hope this goes without saying, but there's absolutely no point in
loading WS/WSC games right now. You won't see anything until I have the
full CPU and partial PPU implemented.
ROM bank 2 works properly now, the I/O map is 16-bit (address) x 16-bit
(data) as it should be*, and I have a basic disassembler in place
(adding to it as I emulate new opcodes.)
(* I don't know what happens if you access an 8-bit port in 16-bit mode
or vice versa, so for now I'm just treating the handlers as always being
16-bit, and discarding the upper 8-bits when not needed.)
byuu says:
So, this WIP starts work on something new for higan. Obviously, I can't
keep it a secret until it's ready, because I want to continue daily WIP
releases, and of course, solicit feedback as I go along.
Tim Allen