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359 Commits

Author SHA1 Message Date
Rekai Nyangadzayi Musuka 0eb40a8109 feat: comply with the fourth individual blargg test rom 2021-04-07 22:37:33 -05:00
Rekai Nyangadzayi Musuka 067ed03de3 feat: comply with test 03 of blargg's cpu_instrs test rom 2021-04-07 20:12:05 -05:00
Rekai Nyangadzayi Musuka 6db132ad48 feat(cartridge): handle MBC-less games like tetris 
TODO: This will panic whenever a write is attempted on the MBC-less
cartridge. This would be fine if games held the implicit rules given by
the hardware, however this is not the case. We will have to modify the
NoMBC implementation to ignore writes to the cartrige (while still
documenting them just in case of bugs)
 2021-04-05 01:43:26 -05:00
Rekai Nyangadzayi Musuka 823e4b1e0a chore: follow rust style guides 2021-04-05 01:40:26 -05:00
Rekai Nyangadzayi Musuka 9b77d6c6c3 fix(cpu): ensure that timer, lcd and sound runs regardless of HALT 2021-04-05 01:20:18 -05:00
Rekai Nyangadzayi Musuka 9d2fbd2427 chore: remove unecessary print statements 2021-04-05 01:20:03 -05:00
Rekai Nyangadzayi Musuka 748c32c446 fix(cpu): use enums only of maintaining IME register state 2021-04-05 01:10:03 -05:00
Rekai Nyangadzayi Musuka 77c7c610d0 chore(cpu): rename ImeSet to ImeEnabled 2021-04-05 00:53:46 -05:00
Rekai Nyangadzayi Musuka a15a6a25b6 feat(cpu): properly implement EI instruction 2021-04-05 00:52:12 -05:00
Rekai Nyangadzayi Musuka 4ace092257 chore: update cargo.lock 2021-04-05 00:50:53 -05:00
Rekai Nyangadzayi Musuka 62bd88945f chore: rename a couple of interrupt instances to "int" instead of 
"interrupt"
 2021-04-04 01:52:53 -05:00
Rekai Nyangadzayi Musuka 7c9bff61f6 fix(ppu): add missing check for enabled interrupt 2021-04-04 01:50:49 -05:00
Rekai Nyangadzayi Musuka 777abd1c10 chore: rename some symbols 2021-04-04 01:31:31 -05:00
Rekai Nyangadzayi Musuka 4dd7a0d9ce chore: fix several clippy warnings 2021-04-04 01:19:39 -05:00
Rekai Nyangadzayi Musuka cb1bcdb859 feat(cpu): implement DAA instruction 2021-04-04 01:03:44 -05:00
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