byuu says:
Changelog:
- gba/cpu: massive code cleanup effort
- gba/cpu: DMA can run in between active instructions¹
- gba/cpu: added two-cycle startup delay between DMA activation and
DMA transfers²
- processor/spc700: BBC, BBC, CBNE cycle 4 is an idle cycle
- processor/spc700: ADDW, SUBW, MOVW (read) cycle 4 is an idle cycle
¹: unfortunately, this causes yet another performance penalty for the
poor GBA core =( Also, I think I may have missed disabling DMAs while
the CPU is stopped. I'll fix that in the next WIP.
²: I put the waiting counter decrement at the wrong place, so this
doesn't actually work. Needs to be more like
this:
auto CPU::step(uint clocks) -> void {
for(auto _ : range(clocks)) {
for(auto& timer : this->timer) timer.run();
for(auto& dma : this->dma) if(dma.active && dma.waiting) dma.waiting--;
context.clock++;
}
...
auto CPU::DMA::run() -> bool {
if(cpu.stopped() || !active || waiting) return false;
transfer();
if(irq) cpu.irq.flag |= CPU::Interrupt::DMA0 << id;
if(drq && id == 3) cpu.irq.flag |= CPU::Interrupt::Cartridge;
return true;
}
Of course, the real fix will be restructuring how DMA works, so that
it's always running in parallel with the CPU instead of this weird
design where it tries to run all channels in some kind of loop until no
channels are active anymore whenever one channel is activated.
Not really sure how to design that yet, however.
byuu says:
Changelog:
- converted Emulator::Interface::Bind to Emulator::Platform
- temporarily disabled SGB hooks
- SMS: emulated Game Gear palette (latching word-write behavior not
implemented yet)
- SMS: emulated Master System 'Reset' button, Game Gear 'Start' button
- SMS: removed reset() functionality, driven by the mappable input now
instead
- SMS: split interface class in two: one for Master System, one for
Game Gear
- SMS: emulated Game Gear video cropping to 160x144
- PCE: started on HuC6280 CPU core—so far only registers, NOP
instruction has been implemented
Errata:
- Super Game Boy support is broken and thus disabled
- if you switch between Master System and Game Gear without
restarting, bad things happen:
- SMS→GG, no video output on the GG
- GG→SMS, no input on the SMS
I'm not sure what's causing the SMS\<-\>GG switch bug, having a hard
time debugging it. Help would be very much appreciated, if anyone's up
for it. Otherwise I'll keep trying to track it down on my end.
byuu says:
Changelog:
- ruby: if DirectSoundCreate fails (no sound device present), return
false from init instead of crashing
- nall: improved edge case return values for
(basename,pathname,dirname,...)
- nall: renamed file_system_object class to inode
- nall: varuint_t replaced with VariadicNatural; which contains
.bit,.bits,.byte ala Natural/Integer
- nall: fixed boolean compilation error on Windows
- WS: popa should not restore SP
- GBA: rewrote the CPU/APU cores to use the .bit,.bits functions;
removed registers.cpp from each
Note that the GBA changes are extremely major. This is about five hours
worth of extremely delicate work. Any slight errors could break
emulation in extremely bad ways. Let's hold off on extensive testing
until the next WIP, after I do the same to the PPU.
So far ... endrift's SOUNDCNT_X I/O test is failing, although that code
didn't change, so clearly I messed up SOUNDCNT_H somehow ...
To compile on Windows:
1. change nall/string/platform.hpp line 47 to
return slice(result, 0, 3);
2. change ruby/video.wgl.cpp line 72 to
auto lock(uint32_t*& data, uint& pitch, uint width, uint height) -> bool {
3. add this line to the very top of hiro/windows/header.cpp:
#define boolean FuckYouMicrosoft
byuu says:
Got it. Wow, that didn't hurt nearly as much as I thought it was going
to.
Dropped from 127.5fps to 123.5fps to use Natural/Integer for
(u)int(8,16,32,64).
That's totally worth the cost.
byuu says:
Changelog:
- restructured the project and removed a whole bunch of old/dead
directives from higan/GNUmakefile
- huge amounts of work on hiro/cocoa (compiles but ~70% of the
functionality is commented out)
- fixed a masking error in my ARM CPU disassembler [Lioncash]
- SFC: decided to change board cic=(411,413) back to board
region=(ntsc,pal) ... the former was too obtuse
If you rename Boolean (it's a problem with an include from ruby, not
from hiro) and disable all the ruby drivers, you can compile an
OS X binary, but obviously it's not going to do anything.
It's a boring WIP, I just wanted to push out the project structure
change now at the start of this WIP cycle.
Tim Allen