2012-04-01 01:41:15 +00:00
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struct CPU : Processor::ARM, Thread, MMIO {
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2015-06-27 02:38:08 +00:00
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using ARM::read;
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using ARM::write;
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2015-06-25 09:52:32 +00:00
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uint8* iwram = nullptr;
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uint8* ewram = nullptr;
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2012-03-29 11:58:10 +00:00
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#include "registers.hpp"
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2015-06-27 02:38:08 +00:00
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#include "prefetch.hpp"
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2012-04-03 23:50:40 +00:00
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#include "state.hpp"
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2012-03-19 11:19:53 +00:00
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2015-06-25 09:52:32 +00:00
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//cpu.cpp
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static auto Enter() -> void;
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2012-04-09 06:19:32 +00:00
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2015-06-25 09:52:32 +00:00
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auto main() -> void;
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2012-03-19 11:19:53 +00:00
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2015-06-28 08:44:56 +00:00
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auto step(unsigned clocks) -> void override;
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auto bus_idle(uint32 addr) -> void override;
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auto bus_read(uint32 addr, uint32 size, bool mode) -> uint32 override;
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auto bus_write(uint32 addr, uint32 size, bool mode, uint32 word) -> void override;
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2012-03-19 11:19:53 +00:00
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2015-06-28 08:44:56 +00:00
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auto sync_step(unsigned clocks) -> void;
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2015-06-25 09:52:32 +00:00
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auto keypad_run() -> void;
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auto power() -> void;
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Update to v087r08 release.
byuu says:
Added some more ARM opcodes, hooked up MMIO. Bind it with mmio[(addr
000-3ff)] = this; inside CPU/PPU/APU, goes to read(), write().
Also moved the Hitachi HG51B core to processor/, and split it apart from
the snes/chip/hitachidsp implementation.
This one actually worked really well. Very clean split between MMIO/DMA
and the processor core. I may move a more generic DMA function inside
the core, not sure yet.
I still believe the HG51B169 to be a variant of the HG51BS family, but
given they're meant to be incredibly flexible microcontrollers, it's
possible that each variant gets its own instruction set.
So, who knows. We'll worry about it if we ever find another HG51B DSP,
I guess.
GBA BIOS is constantly reading from 04000300, but it never writes. If
I return prng()&1, I can get it to proceed until it hits a bad opcode
(stc opcode, which the GBA lacks a coprocessor so ... bad codepath.)
Without it, it just reads that register forever and keeps resetting the
system, or something ...
I guess we're going to have to try and get ARMwrestler working, because
the BIOS seems to need too much emulation code to do anything at all.
2012-03-24 07:52:36 +00:00
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2015-06-25 09:52:32 +00:00
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CPU();
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~CPU();
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Update to v087r26 release.
byuu says:
Changelog:
- fixed FIFO[1] reset behavior (fixes audio in Sword of Mana)
- added FlashROM emulation (both sizes)
- GBA parses RAM settings from manifest.xml now
- save RAM is written to disk now
- added save state support (it's currently broken, though)
- fixed ROM/RAM access timings
- open bus should mostly work (we don't do the PC+12 stuff yet)
- emulated the undocumented memory control register (mirror IWRAM,
disable I+EWRAM, EWRAM wait state count)
- emulated keypad interrupts
- emulated STOP (freezes video, audio, DMA and timers; only breaks on
keypad IRQs)
- probably a lot more, it was a long night ...
Show stoppers, missing things, broken things, etc:
- ST018 is still completely broken
- GBC audio sequencer apparently needs work
- GBA audio FIFO buffer seems too quiet
- PHI / ROM prefetch needs to be emulated (no idea on how to do this,
especially PHI)
- SOUNDBIAS 64/128/256khz modes should output at that resolution
(really, we need to simulate PWM properly, no idea on how to do this)
- object mosaic top-left coordinates are wrong (minor, fixing will
actually make the effect look worse)
- need to emulate PPU greenswap and color palette distortion (no idea on
how do this)
- need GBA save type database (I would also LIKE to blacklist
/ patch-out trainers, but that's a discussion for another day.)
- some ARM ops advance the prefetch buffer, so you can read PC+12 in
some cases
2012-04-16 12:19:39 +00:00
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2015-06-25 09:52:32 +00:00
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//mmio.cpp
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auto read(uint32 addr) -> uint8;
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auto write(uint32 addr, uint8 byte) -> void;
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Update to v087r26 release.
byuu says:
Changelog:
- fixed FIFO[1] reset behavior (fixes audio in Sword of Mana)
- added FlashROM emulation (both sizes)
- GBA parses RAM settings from manifest.xml now
- save RAM is written to disk now
- added save state support (it's currently broken, though)
- fixed ROM/RAM access timings
- open bus should mostly work (we don't do the PC+12 stuff yet)
- emulated the undocumented memory control register (mirror IWRAM,
disable I+EWRAM, EWRAM wait state count)
- emulated keypad interrupts
- emulated STOP (freezes video, audio, DMA and timers; only breaks on
keypad IRQs)
- probably a lot more, it was a long night ...
Show stoppers, missing things, broken things, etc:
- ST018 is still completely broken
- GBC audio sequencer apparently needs work
- GBA audio FIFO buffer seems too quiet
- PHI / ROM prefetch needs to be emulated (no idea on how to do this,
especially PHI)
- SOUNDBIAS 64/128/256khz modes should output at that resolution
(really, we need to simulate PWM properly, no idea on how to do this)
- object mosaic top-left coordinates are wrong (minor, fixing will
actually make the effect look worse)
- need to emulate PPU greenswap and color palette distortion (no idea on
how do this)
- need GBA save type database (I would also LIKE to blacklist
/ patch-out trainers, but that's a discussion for another day.)
- some ARM ops advance the prefetch buffer, so you can read PC+12 in
some cases
2012-04-16 12:19:39 +00:00
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2015-06-25 09:52:32 +00:00
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auto iwram_read(uint32 addr, uint32 size) -> uint32;
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auto iwram_write(uint32 addr, uint32 size, uint32 word) -> void;
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2012-04-07 08:17:49 +00:00
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2015-06-25 09:52:32 +00:00
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auto ewram_read(uint32 addr, uint32 size) -> uint32;
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auto ewram_write(uint32 addr, uint32 size, uint32 word) -> void;
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2012-04-03 23:50:40 +00:00
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2015-06-25 09:52:32 +00:00
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//dma.cpp
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auto dma_run() -> void;
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auto dma_exec(Registers::DMA& dma) -> void;
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auto dma_vblank() -> void;
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auto dma_hblank() -> void;
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auto dma_hdma() -> void;
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//timer.cpp
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auto timer_step(unsigned clocks) -> void;
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auto timer_increment(unsigned n) -> void;
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auto timer_fifo_run(unsigned n) -> void;
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//serialization.cpp
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auto serialize(serializer&) -> void;
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2012-03-19 11:19:53 +00:00
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};
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extern CPU cpu;
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