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bsnes/gb/cpu/cpu.hpp

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Update to v088r01 release. byuu says: - GB::CPU::Core -> Processor::LR35902 - Processor::LR35902 -> jump table to switch table - GB::LCD -> GB::PPU - static frequency for DMG (no multiplication on clock ticks) - GB::PPU::interface->videoRefresh() moved outside scheduler (use host thread) - namespace NES -> Famicom - namespace SNES -> SuperFamicom - namespace GB -> GameBoy - namespace GBA -> GameBoyAdvance - removed boot.rom writeout in GB::System
2012-04-26 10:51:13 +00:00
struct CPU : Processor::LR35902, Thread, MMIO {
Update to release v000r06. 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.)
2011-01-02 04:46:54 +00:00
enum class Interrupt : unsigned {
Vblank,
Stat,
Timer,
Serial,
Joypad,
};
Update to release v000r01. 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.
2010-12-28 06:03:02 +00:00
struct Status {
Update to release v000r08. 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 :(
2011-01-04 10:42:27 +00:00
unsigned clock;
Update to release v000r04. byuu says: [screenshot of the Tetris title screen] Less than fourty-eight hours after starting on this. I guess you weren't kidding, Exophase.
2010-12-30 07:18:47 +00:00
//$ff00 JOYP
bool p15;
bool p14;
Update to release v000r05. 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.
2010-12-31 05:43:47 +00:00
uint8 joyp;
Update to release v000r10. 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
2011-01-06 10:16:07 +00:00
uint8 mlt_req;
Update to release v000r04. byuu says: [screenshot of the Tetris title screen] Less than fourty-eight hours after starting on this. I guess you weren't kidding, Exophase.
2010-12-30 07:18:47 +00:00
Update to v074r11 release. 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
2011-01-24 09:03:17 +00:00
//$ff01 SB
uint8 serial_data;
unsigned serial_bits;
//$ff02 SC
bool serial_transfer;
bool serial_clock;
Update to release v000r04. byuu says: [screenshot of the Tetris title screen] Less than fourty-eight hours after starting on this. I guess you weren't kidding, Exophase.
2010-12-30 07:18:47 +00:00
//$ff04 DIV
uint8 div;
//$ff05 TIMA
uint8 tima;
//$ff06 TMA
uint8 tma;
//$ff07 TAC
bool timer_enable;
unsigned timer_clock;
//$ff0f IF
bool interrupt_request_joypad;
bool interrupt_request_serial;
bool interrupt_request_timer;
bool interrupt_request_stat;
bool interrupt_request_vblank;
Update to v083r05 release. (r04 was not posted to the WIP thread) byuu says: NES: passes ppu_sprite_overflow tests 01, 02, 05. Game Boy: uses DMG BIOS (the one with the slow title scroll) or SGB BIOS, based upon how you load the game. Game Boy Color: Everything except the IR port is emulated. I don't have any plans to allow linking two instances of bsnes. And that's frankly never going to happen over netplay anyway, due to latency requirements of the serial/IR ports. The new DMA stuff is possibly incorrect, my test games don't seem to use it. Zelda: DX usually resets or crashes on the intro right before the beach scene. I'm not sure why. Skip the intro and the game plays fine. This is the best I can do when the most up-to-date GB/C reference document is over ten years old and half-assed (pandocs.) I could really use some help from anyone who understands the system. Probably the worst part of my emulation at the moment is the interrupt system. Lots of things real hardware doesn't allow (DMA outside HRAM, CGB DMA to invalid addresses, etc) isn't blocked yet. LCD renderer is still scanline-based, which is just terrible. Doesn't seem to be any good docs on cycle-level operation. I only know that it's incredibly pathological and variable.
2011-10-27 00:00:17 +00:00
//$ff4d KEY1
bool speed_double;
bool speed_switch;
//$ff51,$ff52 HDMA1,HDMA2
uint16 dma_source;
//$ff53,$ff54 HDMA3,HDMA4
uint16 dma_target;
//$ff55 HDMA5
bool dma_mode;
uint16 dma_length;
Update to v093r07 release. byuu says: Changelog: - importing a game won't show message box on success - importing a game will select the game that was imported in the list - caveat: GTK+ port doesn't seem to be removing focus from item 0 even though the selection is on item 2 - Game Boy audio reduced in volume by 50% - Game Boy Advance audio reduced in volume by 50% - Game Boy internally mixes audio at 2MHz now - Game Boy Advance's Game Boy audio hardware internally mixes audio at 2MHz now - Game Boy Color doesn't sort sprites by X-coordinate - Game Boy Color allows transparency on BGpriority pixels - caveat: this seems to allow sprites to appear on top of windows - Game Boy Color VRAM DMA transfers 16 bytes in 8 clocks (or 16 clocks in double speed mode) - Game Boy Color VRAM DMA masks low 4-bits of source and destination address - Game Boy Color VRAM DMA only allows reads from ROM or RAM - Game Boy Color VRAM DMA only allows writes to VRAM - fixed a bug in dereferencing a nullptr from pObject::find(), should fix crash when pressing enter key on blank windows - fixed Windows RadioItem selection - Game Boy Advance color emulation code added
2013-12-10 12:12:54 +00:00
bool dma_completed;
Update to v083r05 release. (r04 was not posted to the WIP thread) byuu says: NES: passes ppu_sprite_overflow tests 01, 02, 05. Game Boy: uses DMG BIOS (the one with the slow title scroll) or SGB BIOS, based upon how you load the game. Game Boy Color: Everything except the IR port is emulated. I don't have any plans to allow linking two instances of bsnes. And that's frankly never going to happen over netplay anyway, due to latency requirements of the serial/IR ports. The new DMA stuff is possibly incorrect, my test games don't seem to use it. Zelda: DX usually resets or crashes on the intro right before the beach scene. I'm not sure why. Skip the intro and the game plays fine. This is the best I can do when the most up-to-date GB/C reference document is over ten years old and half-assed (pandocs.) I could really use some help from anyone who understands the system. Probably the worst part of my emulation at the moment is the interrupt system. Lots of things real hardware doesn't allow (DMA outside HRAM, CGB DMA to invalid addresses, etc) isn't blocked yet. LCD renderer is still scanline-based, which is just terrible. Doesn't seem to be any good docs on cycle-level operation. I only know that it's incredibly pathological and variable.
2011-10-27 00:00:17 +00:00
//$ff6c ???
uint8 ff6c;
//$ff70 SVBK
uint3 wram_bank;
//$ff72-$ff75 ???
uint8 ff72;
uint8 ff73;
uint8 ff74;
uint8 ff75;
Update to release v000r04. byuu says: [screenshot of the Tetris title screen] Less than fourty-eight hours after starting on this. I guess you weren't kidding, Exophase.
2010-12-30 07:18:47 +00:00
//$ffff IE
bool interrupt_enable_joypad;
bool interrupt_enable_serial;
bool interrupt_enable_timer;
bool interrupt_enable_stat;
bool interrupt_enable_vblank;
Update to release v000r01. 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.
2010-12-28 06:03:02 +00:00
} status;
Update to v093r09 release. byuu says: Changelog: - GB/C OAM DMA now runs in parallel with the CPU - CPU can only access HRAM during OAM DMA - fixed SGB mode again - brand new config files will default to the optimal drivers now (OpenGL, etc) instead of the safest - hopefully fixed remaining Windows UI issues
2013-12-14 06:25:12 +00:00
struct OAMDMA {
bool active;
uint8 bank;
uint8 offset;
} oamdma;
Update to v083r05 release. (r04 was not posted to the WIP thread) byuu says: NES: passes ppu_sprite_overflow tests 01, 02, 05. Game Boy: uses DMG BIOS (the one with the slow title scroll) or SGB BIOS, based upon how you load the game. Game Boy Color: Everything except the IR port is emulated. I don't have any plans to allow linking two instances of bsnes. And that's frankly never going to happen over netplay anyway, due to latency requirements of the serial/IR ports. The new DMA stuff is possibly incorrect, my test games don't seem to use it. Zelda: DX usually resets or crashes on the intro right before the beach scene. I'm not sure why. Skip the intro and the game plays fine. This is the best I can do when the most up-to-date GB/C reference document is over ten years old and half-assed (pandocs.) I could really use some help from anyone who understands the system. Probably the worst part of my emulation at the moment is the interrupt system. Lots of things real hardware doesn't allow (DMA outside HRAM, CGB DMA to invalid addresses, etc) isn't blocked yet. LCD renderer is still scanline-based, which is just terrible. Doesn't seem to be any good docs on cycle-level operation. I only know that it's incredibly pathological and variable.
2011-10-27 00:00:17 +00:00
uint8 wram[32768]; //GB=8192, GBC=32768
Update to release v000r02. 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.
2010-12-29 11:03:42 +00:00
uint8 hram[128];
Update to release v000r01. 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.
2010-12-28 06:03:02 +00:00
static void Main();
Initial commit of bgameboy v000. 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.
2010-12-28 01:53:15 +00:00
void main();
Update to release v000r06. 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.)
2011-01-02 04:46:54 +00:00
void interrupt_raise(Interrupt id);
Update to release v000r04. byuu says: [screenshot of the Tetris title screen] Less than fourty-eight hours after starting on this. I guess you weren't kidding, Exophase.
2010-12-30 07:18:47 +00:00
void interrupt_test();
void interrupt_exec(uint16 pc);
Update to v088r08 release. byuu says: From this WIP, I'm starting on the impossible task of a declarative-based GUI, which I'm calling Ethos. base/ becomes emulator/, and we add emulator/interface.hpp, which is a base API that all emulation cores must implement in full. (Right now, it's kind of a hybrid to work with the old GUI and the new GUI at the same time, of course.) Unlike the old interfaces, the new base class also provides all general usability hooks: loading and saving files and states, cheat codes, etc. The new interface also contains information and vector structs to describe all possible loading methods, controller bindings, etc; and gives names for them all. The actual GUI in fact should not include eg <gba/gba.hpp> anymore. Should speed up GUI compilation. So the idea going forward is that ethos will build a list of emulators right when the application starts up. Once you've appended an emulator to that list, you're done. No more GUI changes are needed to support that system. The GUI will have code to parse the emulator interfaces list, and build all the requisite GUI options dynamically, declarative style. Ultimately, once the project is finished, the new GUI should look ~99% identical to the current GUI. But it'll probably be a whole lot smaller.
2012-04-29 06:29:54 +00:00
bool stop();
Initial commit of bgameboy v000. 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.
2010-12-28 01:53:15 +00:00
void power();
Update to release v000r11. 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
2011-01-07 11:11:56 +00:00
void serialize(serializer&);
Update to v088r01 release. byuu says: - GB::CPU::Core -> Processor::LR35902 - Processor::LR35902 -> jump table to switch table - GB::LCD -> GB::PPU - static frequency for DMG (no multiplication on clock ticks) - GB::PPU::interface->videoRefresh() moved outside scheduler (use host thread) - namespace NES -> Famicom - namespace SNES -> SuperFamicom - namespace GB -> GameBoy - namespace GBA -> GameBoyAdvance - removed boot.rom writeout in GB::System
2012-04-26 10:51:13 +00:00
//mmio.cpp
unsigned wram_addr(uint16 addr) const;
void mmio_joyp_poll();
uint8 mmio_read(uint16 addr);
void mmio_write(uint16 addr, uint8 data);
//memory.cpp
void op_io();
uint8 op_read(uint16 addr);
void op_write(uint16 addr, uint8 data);
void cycle_edge();
Update to v093r07 release. byuu says: Changelog: - importing a game won't show message box on success - importing a game will select the game that was imported in the list - caveat: GTK+ port doesn't seem to be removing focus from item 0 even though the selection is on item 2 - Game Boy audio reduced in volume by 50% - Game Boy Advance audio reduced in volume by 50% - Game Boy internally mixes audio at 2MHz now - Game Boy Advance's Game Boy audio hardware internally mixes audio at 2MHz now - Game Boy Color doesn't sort sprites by X-coordinate - Game Boy Color allows transparency on BGpriority pixels - caveat: this seems to allow sprites to appear on top of windows - Game Boy Color VRAM DMA transfers 16 bytes in 8 clocks (or 16 clocks in double speed mode) - Game Boy Color VRAM DMA masks low 4-bits of source and destination address - Game Boy Color VRAM DMA only allows reads from ROM or RAM - Game Boy Color VRAM DMA only allows writes to VRAM - fixed a bug in dereferencing a nullptr from pObject::find(), should fix crash when pressing enter key on blank windows - fixed Windows RadioItem selection - Game Boy Advance color emulation code added
2013-12-10 12:12:54 +00:00
uint8 dma_read(uint16 addr);
void dma_write(uint16 addr, uint8 data);
Update to v088r01 release. byuu says: - GB::CPU::Core -> Processor::LR35902 - Processor::LR35902 -> jump table to switch table - GB::LCD -> GB::PPU - static frequency for DMG (no multiplication on clock ticks) - GB::PPU::interface->videoRefresh() moved outside scheduler (use host thread) - namespace NES -> Famicom - namespace SNES -> SuperFamicom - namespace GB -> GameBoy - namespace GBA -> GameBoyAdvance - removed boot.rom writeout in GB::System
2012-04-26 10:51:13 +00:00
uint8 debugger_read(uint16 addr);
//timing.cpp
void add_clocks(unsigned clocks);
void timer_262144hz();
void timer_65536hz();
void timer_16384hz();
void timer_8192hz();
void timer_4096hz();
void hblank();
Initial commit of bgameboy v000. 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.
2010-12-28 01:53:15 +00:00
};
Update to v074r08 release. 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
2011-01-22 08:15:49 +00:00
extern CPU cpu;