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bsnes/gameboy/cpu/cpu.hpp

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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
struct CPU : Processor, MMIO {
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
#include "core/core.hpp"
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
#include "mmio/mmio.hpp"
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
#include "timing/timing.hpp"
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 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
bool trace;
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 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
bool halt;
bool stop;
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
bool ime;
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
unsigned timer0;
unsigned timer1;
unsigned timer2;
unsigned timer3;
//$ff00 JOYP
bool p15;
bool p14;
Update to release v000r05. byuu says: Fixed all of the previously mentioned problems by myself and Jonas Quinn. Fixed up JOYP and hooked up JOYP interrupts, they work on JOYP writes as well if your selection makes the low four bits change to != 0xF. Added basic sprite emulation, very very very lousy but it works for Tetris. Fixed DAA, fuck that opcode. Fixes blargg's CPU tests 1 and 11 (for some odd reason.) Only test 2 is failing, on the "EI" test. Maybe it relies on STAT interrupts? Did some other stuff. Tetris is now 100% fully playable. But that renderer is an abomination. Soooooo simplistic and missing so many edge cases. But holy shit, a fully playable commercial game in three days. I would have killed to have made that progress when I started on bsnes.
2010-12-31 05:43:47 +00:00
uint8 joyp;
Update to release v000r10. byuu says: Changelog: - fixed LYC interrupt at LY=0 (fixes Makai Toushi SaGa) - fixed MBC3 ROM bank mapping (fixes Harvest Moon GBC) - added Super Game Boy MLT_REQ support to JOYP, needed for ICD2-R emulation - temporarily changed System::run() to execute only four cycles before exiting for bsnes, will make two versions later - uses actual boot ROMs, has DMG+SGB1 for now. Need SGB2, don't care about CGB. Defaults to SGB1, no way to select just yet. DMG 4-second wait is annoying. Does not force games to act like SGB on bgameboy itself, because that has no ICD2 and fails the required MLT_REQ check
2011-01-06 10:16:07 +00:00
uint8 mlt_req;
Update to release v000r04. byuu says: [screenshot of the Tetris title screen] Less than fourty-eight hours after starting on this. I guess you weren't kidding, Exophase.
2010-12-30 07:18:47 +00:00
//$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;
//$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 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 wram[8192];
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);
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 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
CPU();
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
};
extern CPU cpu;