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385 Commits

Author SHA1 Message Date
Rekai Nyangadzayi Musuka 25e44f3e49 chore: fix condition when logs are printed 2021-03-27 15:07:17 -05:00
Rekai Nyangadzayi Musuka 2b05571c49 chore: rename Cycles newtype to Cycle 2021-03-27 12:10:18 -05:00
Rekai Nyangadzayi Musuka bce14348f8 feat: enable halt and rework timer registers 2021-03-27 11:56:47 -05:00
Rekai Nyangadzayi Musuka 2bf877d1ec fix(cpu): Ensure mask the high bits of the flag register 
There was a bug where POP AF returned 0x1301. In this example, the A
register would be set to 0x13, and the Flag register woud be set to
0x01, which is an invalid state considering only bits 4 -> 7 of the flag
register are used. This commit masks the flag register with & 0xF0
whenever it is read or written to so that we can ensure that only the
high bits can ever be potentially set
 2021-03-26 20:25:30 -05:00
Rekai Nyangadzayi Musuka 15781b3d5a fix(instructions): correct the flags being set in ADD HL, r16 2021-03-26 20:19:48 -05:00
Rekai Nyangadzayi Musuka a6d5553035 fix(cartridge): reimplement apply_rom_size_bitmask 2021-03-26 20:18:49 -05:00
Rekai Nyangadzayi Musuka a82e3d3372 feat: implement HALT behaviour 
note: while the logic is there, the instruction currently does not do
anything because we don't halde it in Cpu::step(). The code that does is
currently commented out and there should be some underlying bugs still
present. Nevertheless it is a good start
 2021-03-23 23:05:27 -05:00
Rekai Nyangadzayi Musuka c16f318fd1 fix: remove unnecessary allocation when loading boot rom 2021-03-23 21:21:18 -05:00
Rekai Nyangadzayi Musuka 48ac8317a8 fix(bus): fix off by one error when reading from boot rom 2021-03-23 21:01:33 -05:00
Rekai Nyangadzayi Musuka e5fb07c4d1 chore: refactor parts of instruction.rs 2021-03-23 20:22:11 -05:00
Rekai Nyangadzayi Musuka 501d93c37b chore: clean up code in one instruction 2021-03-23 18:21:59 -05:00
Rekai Nyangadzayi Musuka 1b7d778c1d chore: clean up some instruction code 2021-03-23 02:11:40 -05:00
Rekai Nyangadzayi Musuka 6f11640f24 chore: replace CALL instruction with RST in interrupt handler 2021-03-23 02:11:06 -05:00
Rekai Nyangadzayi Musuka 342e6616ac chore: improve unreachable! and panic! error messages 2021-03-22 22:33:56 -05:00
Rekai Nyangadzayi Musuka 2813b762dd chore: replace select unreachable! macros with todo! and unreachable! 2021-03-22 21:52:28 -05:00
Rekai Nyangadzayi Musuka 9301a36682 chore: remove all unwraps from the project 2021-03-22 21:48:12 -05:00
Rekai Nyangadzayi Musuka 45466a5733 feat: implement clap for cli and improve error messages 2021-03-22 21:41:22 -05:00
Rekai Nyangadzayi Musuka d7d9fd857f fix: squash bugs in cpu intrucion implementation 2021-03-21 21:16:23 -05:00
Rekai Nyangadzayi Musuka 8a1540c9e9 fix: replaced unnecessary &mut self with &self 2021-03-21 19:56:38 -05:00
Rekai Nyangadzayi Musuka dc45688e4f feat: implement timers 2021-03-21 03:03:03 -05:00
Rekai Nyangadzayi Musuka 4db6f1de6e chore: move LR35902_CLOCK_SPEED to lib.rs 2021-03-21 02:10:56 -05:00
Rekai Nyangadzayi Musuka b548610fdb chore: re-enable scrolling 2021-03-21 02:08:29 -05:00
Rekai Nyangadzayi Musuka fe586d77ac feat: stub 0xFF05 2021-03-21 02:01:19 -05:00
Rekai Nyangadzayi Musuka 15da6cb7d2 fix: squash several bugs in MBC1 implementation 2021-03-21 01:52:29 -05:00
Rekai Nyangadzayi Musuka 5a42d76f1e feat: implement LCDSTAT interrupt 2021-03-21 00:01:21 -05:00
Rekai Nyangadzayi Musuka c64417fdce fix: horizontally flip ppu so the Nin***** logo is readable 2021-03-20 23:24:06 -05:00
Rekai Nyangadzayi Musuka 7462061937 chore: be more specific with integer types 2021-03-20 22:19:55 -05:00
Rekai Nyangadzayi Musuka f78651d8d7 feat: implement programmable background palette 2021-03-20 22:19:13 -05:00
Rekai Nyangadzayi Musuka b213a6e545 feat: make 0xFF0F aware of joypad struct interrupt bool 2021-03-20 21:21:55 -05:00
Rekai Nyangadzayi Musuka 36e572b783 feat: implement Joypad register 2021-03-20 21:11:45 -05:00
Rekai Nyangadzayi Musuka fc303b6265 chore: rename "as u8" to "as Self" when implementing From Trait 2021-03-20 21:10:48 -05:00
Rekai Nyangadzayi Musuka cd0eac9d37 chore: improve code quality 
Removed a lot of magic constants. Gave them descriptive variable names
 2021-03-20 20:26:49 -05:00
Rekai Nyangadzayi Musuka 0f4dec8a38 feat: implement cpu timing for emulator 
When running the GB Boot ROM, a garbled Nin***** logo will appear
 2021-03-20 19:56:26 -05:00
Rekai Nyangadzayi Musuka d76b3b6101 chore: make Cycles::new a const fn 2021-03-20 19:55:39 -05:00
Rekai Nyangadzayi Musuka 2401cf7190 chore: implement default for cycles 2021-03-20 19:55:02 -05:00
Rekai Nyangadzayi Musuka f365633c1e fix: allow for the ppu to modify interrupt flags 2021-03-20 19:53:56 -05:00
Rekai Nyangadzayi Musuka 558f9e7c72 feat: implement cpu interrupts 2021-03-18 21:07:19 -05:00
Rekai Nyangadzayi Musuka fb38ef3f68 feat: emu slowly draws scanline to pixelbuffer 2021-03-18 21:06:57 -05:00
Rekai Nyangadzayi Musuka 4663e8c960 chore: unifty read_byte and write_byte across hardware 2021-03-17 00:29:36 -05:00
Rekai Nyangadzayi Musuka adeb6ca8a9 feat: implement window x, window y and ly compare registers 2021-03-16 22:52:43 -05:00
Rekai Nyangadzayi Musuka 06821bf880 fix: improve types of heap allocated arrays 2021-03-16 22:51:41 -05:00
Rekai Nyangadzayi Musuka 528b88eeb7 feat: implement Obj Palette 0 and 1 2021-03-16 02:36:09 -05:00
Rekai Nyangadzayi Musuka 8af434da07 fix: have the PPU use the CPU-writable Display Mode enum 2021-03-16 02:35:01 -05:00
Rekai Nyangadzayi Musuka 8c25e6f976 chore: fix spelling mistake 2021-03-16 02:31:07 -05:00
Rekai Nyangadzayi Musuka 19f642eafe chore: make clippy happy 2021-03-16 01:05:13 -05:00
Rekai Nyangadzayi Musuka bfde24cc8d fix: reimplement some ppu structs as bitfield macros 2021-03-16 00:27:27 -05:00
Rekai Nyangadzayi Musuka ef4cc8c3b6 chore: standardize the error message of a subet of unreachable! calls 2021-03-15 23:53:55 -05:00
Rekai Nyangadzayi Musuka 3b5d94adfc fix: reimplement flags register to be a bitfield 2021-03-15 23:35:20 -05:00
Rekai Nyangadzayi Musuka f57cf2b312 fix: switch to bitfield macros in serial.rs 2021-03-15 22:52:26 -05:00
Rekai Nyangadzayi Musuka d0410c4dfd fix: modify access parameters in timer.rs 2021-03-15 22:51:12 -05:00
Rekai Nyangadzayi Musuka f17bb032cc fix: implement bitfield macros in timer.rs 2021-03-15 22:41:41 -05:00
Rekai Nyangadzayi Musuka 1a8506c04f chore: improve code quality 2021-03-15 22:36:27 -05:00
Rekai Nyangadzayi Musuka 3d82465b04 chore: clean up code 2021-03-15 22:08:47 -05:00
Rekai Nyangadzayi Musuka 84babc4d69 fix: convert structs to bitfield structs in interrupt.rs 2021-03-15 21:59:53 -05:00
Rekai Nyangadzayi Musuka 602a0af4b7 chore: update parameter names in sound.rs 2021-03-15 21:43:50 -05:00
Rekai Nyangadzayi Musuka f929cd5989 chore: update access modifiers in sound.rs 2021-03-15 21:36:57 -05:00
Rekai Nyangadzayi Musuka 8989d3f1d7 fix: convert sound.rs structs to bitfields 2021-03-15 21:16:11 -05:00
Rekai Nyangadzayi Musuka 98e67b8c1c chore: fix spelling error 2021-03-15 19:20:08 -05:00
Rekai Nyangadzayi Musuka d30ce4dbb2 chore: improve code quailty 2021-03-15 19:19:40 -05:00
Rekai Nyangadzayi Musuka 5d95eadd2e fix: implement Default and Clone for Box<dyn MBC> 2021-03-15 19:08:19 -05:00
Rekai Nyangadzayi Musuka d78a50fefc chore: fix tests and simplify CI build 2021-01-27 22:17:01 -06:00
Rekai Nyangadzayi Musuka b053260c8b feat: don't embed gb boot rom in emulator 2021-01-27 22:07:31 -06:00
Rekai Nyangadzayi Musuka b5d3a2c675 feat: implement MBC1 2021-01-20 01:39:24 -06:00
Rekai Nyangadzayi Musuka 96bfc43312 chore: fix spelling errors 2021-01-19 22:44:48 -06:00
Rekai Nyangadzayi Musuka 842e670807 fix: replace MathTarget::HL and ::SP with already-existing enums 2021-01-19 02:05:04 -06:00
Rekai Nyangadzayi Musuka b70c398e14 feat: implement registers 0xFF01 and 0xFF02 2021-01-19 01:40:07 -06:00
Rekai Nyangadzayi Musuka 68c9557c43 chore: improve code quality 2021-01-19 01:36:44 -06:00
Rekai Nyangadzayi Musuka 1da01a318d feat: emulator now sucessfully runs boot rom 2021-01-19 00:30:32 -06:00
Rekai Nyangadzayi Musuka 9143286e9c feat: implement more operator overrides for Cycles 2021-01-19 00:29:04 -06:00
Rekai Nyangadzayi Musuka 9b4c95ce4c feat: reimplement cycles newtype 2021-01-18 22:54:38 -06:00
Rekai Nyangadzayi Musuka 2fc7ac3833 feat: add pixels-rs and winit as dependencies 2021-01-18 20:47:09 -06:00
Rekai Nyangadzayi Musuka 207bcfea30 chore: improve debug logs 2021-01-18 02:47:41 -06:00
Rekai Nyangadzayi Musuka 49a45d48cb fix: improve appearance of debug logs 2021-01-18 02:29:35 -06:00
Rekai Nyangadzayi Musuka 9203b61533 fix: implement 0xff41 and fix CALL instruciton 2021-01-18 02:22:45 -06:00
Rekai Nyangadzayi Musuka 386a780a6f fix: call opcode now pushes correct address onto stack 2021-01-17 22:12:00 -06:00
Rekai Nyangadzayi Musuka c0b8b8bda2 feat: implement more registers 2021-01-17 21:13:59 -06:00
Rekai Nyangadzayi Musuka 70de3b9142 feat: stub 0xff40 and 0xff47 2021-01-17 19:25:53 -06:00
Rekai Nyangadzayi Musuka 92218a227d feat: implement 0xff24 sound register 2021-01-17 18:58:57 -06:00
Rekai Nyangadzayi Musuka 251f4e8d6d feat: implement several sound i/o registers 2021-01-17 17:33:12 -06:00
Rekai Nyangadzayi Musuka 072c5f1b70 fix: squash bug in 64 LD instructions 2021-01-17 17:31:45 -06:00
Rekai Nyangadzayi Musuka 834423fe18 feat: stub sound register 0xff26 2021-01-03 02:05:46 -06:00
Rekai Nyangadzayi Musuka 1b53363095 feat: stub 0xff0f and 0xffff from interrupt 2021-01-03 01:38:31 -06:00
Rekai Nyangadzayi Musuka e693ad8a3c feat: create timer struct and stub 0xff07 2021-01-03 01:21:19 -06:00
Rekai Nyangadzayi Musuka 911f0f9c86 feat: stub work ram 2021-01-03 00:28:07 -06:00
Rekai Nyangadzayi Musuka 8048495cbc chore: move ppu vram from stack to heap 2021-01-02 23:58:49 -06:00
Rekai Nyangadzayi Musuka fb0772c671 chore: remove duplicate code 2021-01-02 22:49:25 -06:00
Rekai Nyangadzayi Musuka fe74f80ddf chore: format code 2020-12-24 00:34:48 -06:00
Rekai Nyangadzayi Musuka 26df683cff chore: move vram buffer to PPU struct 2020-12-24 00:27:06 -06:00
Rekai Nyangadzayi Musuka 677a584ba7 chore: stub vram, start work on ppu, fix set_register bug 2020-12-23 21:24:58 -06:00
Rekai Nyangadzayi Musuka 2a234f4d14 feat: implement ability to boot straigt to cartridge 2020-12-23 19:39:37 -06:00
Rekai Nyangadzayi Musuka 1502cc3ec2 chore: add debug information to bus.rs 2020-12-23 03:43:49 -06:00
Rekai Nyangadzayi Musuka 4d2e0e33f2 feat: implement fetch, decode, execute loop 2020-12-23 03:25:16 -06:00
Rekai Nyangadzayi Musuka e540c86c7e chore: make InstrRegisterPair public 2020-12-23 01:58:55 -06:00
Rekai Nyangadzayi Musuka bf945c3f44 chore: make InstrRegister public to satisfy rust 2020-12-23 01:27:11 -06:00
Rekai Nyangadzayi Musuka db86d11085 chore: refactor LDTarget and InstrRegister 2020-12-23 01:24:06 -06:00
Rekai Nyangadzayi Musuka 2e1c97e5d7 chore: reorganize instructions.rs 2020-12-23 01:17:13 -06:00
Rekai Nyangadzayi Musuka 9cd4c4ea11 chore: remove duplicate Instruction::INC match 2020-12-23 01:11:03 -06:00
Rekai Nyangadzayi Musuka 5187cbed76 feat: implement remaining gb opcodes 
As of now, the initial implementation of all GameBoy opcoes are
complete. There's most likely a lot of bugs in them, however the
foundtain has been placed.
 2020-12-23 01:07:30 -06:00
Rekai Nyangadzayi Musuka 9be1d1508e feat: implement all opcodes in rot table 2020-12-23 00:24:29 -06:00
Rekai Nyangadzayi Musuka f9d7fe05df Merge branch 'master' of ssh://ssh.paoda.moe:31059/paoda/gb 2020-12-22 22:23:28 -06:00
Rekai Nyangadzayi Musuka 4bf9ccb98c chore: qol update 2020-12-22 22:23:09 -06:00
Rekai Nyangadzayi Musuka c876778da8 chore: replace 16-bit half carry implementation 2020-11-28 15:42:50 -06:00
Rekai Nyangadzayi Musuka 7edffb166d chore: Implement exec of RLC and RRC 2020-09-07 22:34:09 -05:00
Rekai Nyangadzayi Musuka a4b3da1939 chore: replace unimplemented!() with unreachable!() 2020-09-07 21:51:20 -05:00
Rekai Nyangadzayi Musuka cd6f242f56 feat: Implement exec of all unprefixed opcodes 2020-09-07 21:49:10 -05:00
Rekai Nyangadzayi Musuka eb90ac31e2 chore: Document prefixed opcode decoding 2020-09-07 21:22:26 -05:00
Rekai Nyangadzayi Musuka 7538f946d4 feat: Implement prefixed opcode decoding 2020-09-07 21:18:53 -05:00
Rekai Nyangadzayi Musuka a9510bed54 chore: Document instruction execution implementations 2020-09-07 20:57:31 -05:00
Rekai Nyangadzayi Musuka f193132c5e chore: Implement imm byte versions of alu opcodes 2020-09-07 20:50:33 -05:00
Rekai Nyangadzayi Musuka 70a959fa32 chore: Remove LHS MathTarget from ADC and SBC 2020-09-07 20:28:24 -05:00
Rekai Nyangadzayi Musuka e31d83deae chore: Implement DI, EI, CALL & PUSH instructions 2020-09-07 20:19:10 -05:00
Rekai Nyangadzayi Musuka 0e3bdb8a2a chore: convert TryFrom error types to &'static str 
Prevents an unnecessary heap allocation when a RegisterPair::try_from() or
Register::try_from() fails.
 2020-09-04 14:43:19 -05:00
Rekai Nyangadzayi Musuka 213c5e5cb3 Implement more instructions 2020-09-04 00:41:19 -05:00
Rekai Nyangadzayi Musuka 11d2d26cdc Implement more instrucitons 2020-09-02 21:54:58 -05:00
Rekai Nyangadzayi Musuka 49dac85470 Utilize pattern matching more 2020-09-02 19:35:48 -05:00
Rekai Nyangadzayi Musuka cb365fd932 Implement Instructions and rename enums 2020-09-02 17:26:46 -05:00
Rekai Nyangadzayi Musuka 0be0030ed7 Implement CPU Instructions 2020-09-01 00:16:05 -05:00
Rekai Nyangadzayi Musuka 21b7f82422 Decode all unprefixed opcodes 2020-08-29 23:07:53 -05:00
Rekai Nyangadzayi Musuka e0235094bb Implement basic layout of Gameboy Emulator 2020-08-29 18:38:27 -05:00
Rekai Nyangadzayi Musuka 0401bb7e49 Restart Project 2020-08-25 12:10:38 -05:00
Rekai Nyangadzayi Musuka 4bc18f4dd9 Resolve build error 2020-08-24 00:54:36 -05:00
Rekai Nyangadzayi Musuka b1bbd67832 Implement 2 opcodes 2020-08-24 00:53:47 -05:00
Rekai Nyangadzayi Musuka deec130381 Implement decode for all x=2 unprefixed opcodes 2020-08-24 00:42:16 -05:00
Rekai Nyangadzayi Musuka 378a559106 Implement decode for all x=1 unprefixed opcodes. 2020-08-24 00:11:54 -05:00
Rekai Nyangadzayi Musuka 146e2dc066 Implement decode for all x=0 unprefixed opcodes. 2020-08-23 23:56:20 -05:00
Rekai Musuka f97bf9dbb7 Stub Bus, and CPU, implement some opcode decoding. 2020-08-06 01:05:16 -05:00
Rekai Musuka b274d61f56 Restart Project 2020-08-05 21:54:30 -05:00
Rekai Musuka a3cd9166ab Implement Register methods, and stub ADD opcodes 2020-08-05 03:23:50 -05:00
Rekai Musuka 8b475cb4cf Restart GB Emulator 2020-08-04 17:58:48 -05:00
Rekai Musuka 9032716346 Stub 8-bit ALU and 16-bit Arithmetic opcodes. 2020-08-01 16:31:24 -05:00
Rekai Musuka 8a822437fb Rename struct Instruction's methods 2020-07-30 22:41:30 -05:00
Rekai Musuka 26ddb1f9f0 Write stubs for some 16-bit LD instructions 2020-07-29 14:41:56 -05:00
Rekai Musuka 0f85e6702b Stub 8-bit LD Instructions 2020-07-28 23:58:50 -05:00
paoda 167c267e36 Reimplement Flag Register struct 2020-07-22 01:41:12 -05:00
Rekai Musuka 05cff7a27f Implement LR35902 Registers 2020-07-22 00:19:27 -05:00