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365 Commits

Author SHA1 Message Date
Rekai Nyangadzayi Musuka da4bb17782 chore: properly deallocate OAM buffer 2022-03-22 11:41:17 -03:00
Rekai Nyangadzayi Musuka 5dd69500ca fix: speed percentage in title is now accurate 
We now properly account for full speed being 59.97Hz not, 59Hz or 60Hz
 2022-03-22 10:39:42 -03:00
Rekai Nyangadzayi Musuka eff25a0ab2 chore: make some variables const 2022-03-19 02:00:53 -03:00
Rekai Nyangadzayi Musuka 1901a471e4 feat: minor performance improvements 2022-03-18 09:49:49 -03:00
Rekai Nyangadzayi Musuka 3d61c0dba4 feat: switch from BGR555 to RGBA8888 2022-03-18 07:52:54 -03:00
Rekai Nyangadzayi Musuka 39ab363afa fix: improve perf of instructions w/ rotr 2022-03-16 22:56:37 -03:00
Rekai Nyangadzayi Musuka 1921218c7b fix: improve frame limiting and fps counting 2022-03-16 21:25:32 -03:00
Rekai Nyangadzayi Musuka 40968f0990 fix: implement proper SRAM mirroring and stub Flash 2022-03-15 21:54:55 -03:00
Rekai Nyangadzayi Musuka 04d54ec97a chore: move DMA and Timers from io to bus 2022-03-15 08:25:26 -03:00
Rekai Nyangadzayi Musuka 1fd80c1c23 feat: define APU registers 2022-03-15 08:09:07 -03:00
Rekai Nyangadzayi Musuka 48679fa4ca fix: move code in scheduler to ppu 2022-03-15 08:09:07 -03:00
Rekai Nyangadzayi Musuka bdea19f280 chore: create different types of emuloops 2022-03-15 03:46:33 -03:00
Rekai Nyangadzayi Musuka 5579643d65 fix: resolve relative sprite priority issues 2022-03-15 00:37:29 -03:00
Rekai Nyangadzayi Musuka c6e6b42869 chore: improve accuracy of frame limiter 2022-03-14 20:38:29 -03:00
Rekai Nyangadzayi Musuka 3623362f72 chore: improve accuracy of thread sleep in emu thread 2022-03-14 08:54:48 -03:00
Rekai Nyangadzayi Musuka c538079ad4 feat: implement video sync 2022-03-14 05:16:02 -03:00
Rekai Nyangadzayi Musuka 8e3f48837d chore: organize io switch statements 2022-03-13 07:50:19 -03:00
Rekai Nyangadzayi Musuka 025f295c08 fix: mirror SRAM 
SRAM is mirrored in 64K chunks
TODO: According to GBATEK SRAM chips are 32K and mirrored
 2022-03-13 05:53:32 -03:00
Rekai Nyangadzayi Musuka 017ec407f5 chore: don't panic on unknown bus and io writes/reads 
This will lead to emulation bugs due to devices I've yet to implement but by
doing this a lot of games become playable "by default" such as Doom or
Kirby: Nightmare in Dream Land.

When implementing feature and/or debuggin make sure to set:
panic_on_und_bus and panic_on_und_io to true so that the emu crashes
on unknown reads/writes
 2022-03-13 05:39:09 -03:00
Rekai Nyangadzayi Musuka 4a76611fca feat: implement Timers 2022-03-13 05:35:01 -03:00
Rekai Nyangadzayi Musuka cb10dfbdfd fix: implement sprite coord overflow behaviour 2022-03-12 03:46:41 -04:00
Rekai Nyangadzayi Musuka 0c50ef1e6d fix: resolve issues with sprite mirroring 2022-03-11 23:52:56 -04:00
Rekai Nyangadzayi Musuka 05e67da181 feat: Implement MVP of Mode 0 Sprites 2022-03-11 01:43:47 -04:00
Rekai Nyangadzayi Musuka f1df3d6615 chore: clean up io 2022-03-04 22:55:04 -04:00
Rekai Nyangadzayi Musuka c5b4b51ae0 feat: fix tile flipping issue 2022-03-03 03:08:35 -04:00
Rekai Nyangadzayi Musuka 2e4854c2ff chore: add some type definitions for sprites 2022-03-03 02:10:33 -04:00
Rekai Nyangadzayi Musuka 85f0b13f4a feat: improve DMA Transfer support 2022-03-03 02:10:29 -04:00
Rekai Nyangadzayi Musuka dccd00782b chore(ppu): resolve integer overflow regression 2022-03-02 23:15:10 -04:00
Rekai Nyangadzayi Musuka 3d8c944bcc feat(ppu): implement bg priority and transparency 2022-03-02 01:39:05 -04:00
Rekai Nyangadzayi Musuka cb4d3a9a51 chore: replace unnecessarily complex sign extension implementation 2022-02-28 20:38:50 -04:00
Rekai Nyangadzayi Musuka ddb68a7952 feat: pass beeg yoshi 2022-02-28 18:24:24 -04:00
Rekai Nyangadzayi Musuka 97de5d1a96 fix: palette id is a u16 not a u8 2022-02-28 17:32:10 -04:00
Rekai Nyangadzayi Musuka d6ef53fd67 feat: DMA Transfer MVP 2022-02-28 12:34:00 -06:00
Rekai Nyangadzayi Musuka b65f833b28 feat(ppu): implement transparency + backdrop in mode 0 2022-02-26 18:33:16 -06:00
Rekai Nyangadzayi Musuka ac0486be1b chore(io): replace some bitfields with enums 2022-02-24 17:20:23 -06:00
Rekai Nyangadzayi Musuka 441ebc38c7 fix: better emulate behaviour of IO reads 2022-02-24 17:20:20 -06:00
Rekai Nyangadzayi Musuka be2dfb379a chore: document select unimplmented I/O registers 
These registers are written to / read from Kirby: Nightmare in Dream Land
 2022-02-22 17:14:30 -06:00
Rekai Nyangadzayi Musuka bc66be6c06 feat: impelement a barebones SRAM 2022-02-22 17:14:26 -06:00
Rekai Nyangadzayi Musuka 5368ff912d feat: pass retAddr.gba 2022-02-21 15:34:46 -06:00
Rekai Nyangadzayi Musuka c2cf2d2965 feat: implement Hblank and Vcount Interrupts 
Also implemented unique behaviour when writing to IF
 2022-02-21 14:45:47 -06:00
Rekai Nyangadzayi Musuka e5ab8b51a9 chore: improve Bus log + panic messages 2022-02-19 11:48:43 -05:00
Rekai Nyangadzayi Musuka c767e88e8d chore: improve io.zig 2022-02-19 11:48:17 -05:00
Rekai Nyangadzayi Musuka 9e2e8c3d1a feat: implement mirroring for IWRAM EWRAM, OAM and PALRAM 
Also realized I confused IWRAM and EWRAM. This is also fixed
TODO: Implemnt Mirroring for VRRAM
 2022-02-19 10:08:31 -05:00
Rekai Nyangadzayi Musuka e426f2459e fix: resolve integer overflow in BG0 Drawing 2022-02-19 06:55:30 -04:00
Rekai Nyangadzayi Musuka 3746cf6025 chore: don't panic on 32-bit I/O 2022-02-19 06:45:39 -04:00
Rekai Nyangadzayi Musuka f6c8d7ca07 chore: stub CPU HALTing 2022-02-17 00:27:34 -04:00
Rekai Nyangadzayi Musuka 07343efdf3 chore: correct logic errors in map size 1 and 3 2022-02-16 23:49:08 -04:00
Rekai Nyangadzayi Musuka 4018f3875b chore: properly write to VOFS and HOFS in 32-bit bus 2022-02-16 23:23:41 -04:00
Rekai Nyangadzayi Musuka 034f2e8d1d feat: implement hofs and vofs on io bus 2022-02-16 04:29:04 -04:00
Rekai Nyangadzayi Musuka d275a4890f feat: implement scrolling 2022-02-16 03:37:25 -04:00
Rekai Nyangadzayi Musuka ce97a52868 feat: add support for multiple BGs in Mode 0 2022-02-16 03:27:06 -04:00
Rekai Nyangadzayi Musuka d2d4667f7b feat: document mode 0 2022-02-16 03:05:19 -04:00
Rekai Nyangadzayi Musuka 5835b509e4 feat: Mode 0 MVP 2022-02-16 02:27:15 -04:00
Rekai Nyangadzayi Musuka 338122ed43 chore: use zig slices for fun 2022-02-13 05:28:56 -04:00
Rekai Nyangadzayi Musuka e5a76a3c02 chore: give DISPCNT DISPSTAT and VCOUNT to PPU struct 2022-02-13 04:28:15 -04:00
Rekai Nyangadzayi Musuka 31fa06ac4a chore: give io read/write functions access to the entire Bus 2022-02-13 04:13:06 -04:00
Rekai Nyangadzayi Musuka ec25a9aae4 feat: implement BG Scrolling Registers 2022-02-13 04:04:10 -04:00
Rekai Nyangadzayi Musuka b238a3e8f3 feat: impelemnt BG0,1,2CNT and IF 2022-02-13 03:23:09 -04:00
Rekai Nyangadzayi Musuka aca7fc9a60 feat: implement OAM 2022-02-13 02:30:02 -04:00
Rekai Nyangadzayi Musuka d2740e30d9 chore: squash bugs preventing swi_demo.gba from working 2022-02-13 02:29:53 -04:00
Rekai Nyangadzayi Musuka 8ab7a178c1 chore(cpu): reimplement bank switching logic 2022-02-12 04:33:32 -04:00
Rekai Nyangadzayi Musuka d897c2fdcc fix: don't mask away MSB in THUMB.5 add 2022-02-12 03:23:55 -04:00
Rekai Nyangadzayi Musuka 783706193b fix: properly decode format 11 instructions 2022-02-12 03:13:38 -04:00
Rekai Nyangadzayi Musuka b93bd53529 chore: make use of scoped logging 2022-02-11 01:33:33 -04:00
Rekai Nyangadzayi Musuka ee27053db3 chore: remove TODOs and some useless imports 2022-02-06 19:07:23 -04:00
Rekai Nyangadzayi Musuka 7441dd151c fix: improper condition check and initialization of register 2022-02-06 18:41:16 -04:00
Rekai Nyangadzayi Musuka bbd4447734 fix(cpu): force align thumb and arm block data transfers 2022-02-06 17:08:12 -04:00
Rekai Nyangadzayi Musuka 225c0f7d55 feat: pass arm.gba 2022-02-06 05:06:25 -04:00
Rekai Nyangadzayi Musuka fcde905ae1 chore: reimplement ARM LDM/STM 2022-02-06 04:34:45 -04:00
Rekai Nyangadzayi Musuka 798987eba0 chore: improve arm ldm/stm 2022-02-05 23:29:34 -04:00
Rekai Nyangadzayi Musuka adfd501fc4 fix(cpu): force-align SWP reads and writes 2022-02-05 23:18:23 -04:00
Rekai Nyangadzayi Musuka 9581e3b3cb fix: force-align ARM STRH reads 2022-02-05 23:09:13 -04:00
Rekai Nyangadzayi Musuka 1b9ab1f1d7 fix: implement the same LDRSH logic as THUMB LDRSH 2022-02-05 23:09:02 -04:00
Rekai Nyangadzayi Musuka c52dc5adb1 fix: PC is 12 ahead when it is rd in str and strb 2022-02-05 21:42:04 -04:00
Rekai Nyangadzayi Musuka 7bfb87a859 fix: listen to my past self 
By deleting this line I go from test 234 to test 355 in arm.gba
 2022-02-05 21:35:26 -04:00
Rekai Nyangadzayi Musuka 0aece06107 chore: dont use std.mem.bytesToValue 
the stdlib accounts for endianness, which isn't something we want.
 2022-02-05 21:05:08 -04:00
Rekai Nyangadzayi Musuka 2842345111 chore: remove unnecessary @as calls 2022-02-05 21:01:39 -04:00
Rekai Nyangadzayi Musuka aa6f3c7a92 feat: pass thumb.gba 2022-02-05 20:39:15 -04:00
Rekai Nyangadzayi Musuka 3ae24d6977 chore: account for empty rlist in THUMB LDM/STM 2022-02-05 18:03:39 -04:00
Rekai Nyangadzayi Musuka 0a22730479 fix(cpu): handle edge case in LDRSH 2022-02-05 17:12:25 -04:00
Rekai Nyangadzayi Musuka bf4207ba8c chore: reorganize util.zig 2022-02-05 15:55:12 -04:00
Rekai Nyangadzayi Musuka 78080b4682 fix: zero initialize all allocated memory 2022-02-05 15:54:53 -04:00
Rekai Nyangadzayi Musuka 428eff1468 Revert "fix: allow for 32-bit reads to KEYINPUT" 
This reverts commit 3a51707280.
 2022-02-05 14:52:49 -04:00
Rekai Nyangadzayi Musuka 5ec8d4b0a5 fix: resolve decoding mixup in THUMB format 8 instructions 2022-02-05 14:50:34 -04:00
Rekai Nyangadzayi Musuka 3a51707280 fix: allow for 32-bit reads to KEYINPUT 2022-02-05 13:47:05 -04:00
Rekai Nyangadzayi Musuka b4d20fb264 chore: refactor ARMv4 decoding 2022-02-05 13:46:55 -04:00
Rekai Nyangadzayi Musuka 746158043d chore: add more debug information to CPU panic method 2022-02-05 13:46:24 -04:00
Rekai Nyangadzayi Musuka 25300c8a9f chore: give more descriptive panic messages when changing mode fails 2022-02-04 16:54:57 -04:00
Rekai Nyangadzayi Musuka 27d0ba8c7e chore: clean up THUMB instruction decoding 2022-02-04 15:57:46 -04:00
Rekai Nyangadzayi Musuka 2f74b61f2e feat: parse cartridge header 2022-02-04 05:54:06 -04:00
Rekai Nyangadzayi Musuka b233981a34 feat: rename ARM and THUMB SWI functions 2022-02-04 04:34:47 -04:00
Rekai Nyangadzayi Musuka 1b8db0c427 chore: group THUMB and select ARM instructions together (same file) 2022-02-04 04:18:20 -04:00
Rekai Nyangadzayi Musuka 3e4f9eddb2 feat: integrate zig-clap with ZBA 2022-02-04 03:12:35 -04:00
Rekai Nyangadzayi Musuka 6ab4610a81 fix(cpu): properly decode format 7 and 8 2022-02-03 01:29:18 -04:00
Rekai Nyangadzayi Musuka 91384a7c68 fix(cpu): resolve edge cases in THUMB Format 5 2022-02-03 00:55:57 -04:00
Rekai Nyangadzayi Musuka c6bb4bf8e1 fix(cpu): allow for select values to overflow 
FuzzARM found these operations which panicked, when they should
have overflowed. These are now fixed

n = 8000
 2022-02-02 22:49:33 -04:00
Rekai Nyangadzayi Musuka 800ed6f1a7 feat(cpu): implement format 13 
While bugs do exist, at this point all THUMB and ARMv4 instructions
have been implemented! Yay!
 2022-02-02 22:31:21 -04:00
Rekai Nyangadzayi Musuka 027e4fb57b feat(cpu): implement THUMB format 17 2022-02-02 22:31:08 -04:00
Rekai Nyangadzayi Musuka 1378c809e6 feat(cpu): implement THUMB format11 2022-02-02 22:30:46 -04:00
Rekai Nyangadzayi Musuka 33399e9517 chore: update to latest zig nightly 2022-02-02 21:26:12 -04:00
Rekai Nyangadzayi Musuka 99492a6782 chore: progress towards passing ldr/str thumb in armwrestler 2022-02-02 21:14:46 -04:00
Rekai Nyangadzayi Musuka 8b574efe85 fix(cpu): properly negate in NEG 2022-02-02 20:12:20 -04:00
Rekai Nyangadzayi Musuka 9fd03d2a92 fix(cpu): reimplement THUMB offset shifts 2022-02-02 20:12:07 -04:00
Rekai Nyangadzayi Musuka 9affe01da8 fix(cpu): op == 0b00 decodes to add in format 5 2022-02-02 18:58:06 -04:00
Rekai Nyangadzayi Musuka 784bc81a4a fix(cpu): account for overflow in THUMB alu MUL 2022-02-02 18:57:33 -04:00
Rekai Nyangadzayi Musuka 045c98de1f chore: use if-else when decoding THUMB instructions 2022-02-02 18:48:47 -04:00
Rekai Nyangadzayi Musuka c2901ee0d8 fix(cpu): account for rn in rlist in block data transfer 2022-02-02 17:35:33 -04:00
Rekai Nyangadzayi Musuka d95efa5b12 feat: implement LDM/STM behaviour when S is set 2022-02-02 16:12:47 -04:00
Rekai Nyangadzayi Musuka 237beb9caa feat(cpu): Pass all LDR/STR ARMwrestler tests 2022-02-02 14:07:18 -04:00
Rekai Nyangadzayi Musuka 30bad76e44 feat(cpu): decode and implement all necessary ARM CPU instructions 2022-02-02 12:06:41 -04:00
Rekai Nyangadzayi Musuka c34c2ee6eb feat(cpu): implement ARM SWP and SWPB 2022-02-02 08:44:33 -04:00
Rekai Nyangadzayi Musuka 6c7934be70 fix: resolve off by n * 2 when accessing Palette during BG Mode 4 2022-02-01 22:56:53 -04:00
Rekai Nyangadzayi Musuka 48017b45f5 feat(cpu): Implement Multiply Long ARM instructions 2022-02-01 22:09:38 -04:00
Rekai Nyangadzayi Musuka 28c81f79ae fix: no buttons are pressed by default 2022-02-01 20:52:01 -04:00
Rekai Nyangadzayi Musuka a80600156d feat(cpu): implement format 18 THUMB instructions 2022-02-01 19:12:01 -04:00
Rekai Nyangadzayi Musuka 0d7600ed7a chore: more detailed panic message 2022-02-01 19:11:56 -04:00
Rekai Nyangadzayi Musuka ca41f6a85c feat(cpu): implement format 10 THUMB instructions 2022-02-01 17:56:11 -04:00
Rekai Nyangadzayi Musuka 85927a943f feat(cpu): implement SWP 2022-02-01 16:30:55 -04:00
Rekai Nyangadzayi Musuka b27bf4a85c fix(cpu): perform MUL with u64s, throw away upper 32 bits 2022-02-01 16:15:08 -04:00
Rekai Nyangadzayi Musuka b07eb22b86 feat: implement keyboard input 2022-02-01 16:11:59 -04:00
Rekai Nyangadzayi Musuka f6e4b4931f chore: don't panic on unsupported BG mode 2022-01-30 02:43:11 -04:00
Rekai Nyangadzayi Musuka e35d81eeb8 chore: tempoarily disable fps counter 2022-01-30 02:42:01 -04:00
Rekai Nyangadzayi Musuka 8c248ffb11 chore: zero-initialize VRAM 2022-01-30 02:39:16 -04:00
Rekai Nyangadzayi Musuka b0332e6eb8 chore: stub KeyInput I/O register 2022-01-30 02:38:29 -04:00
Rekai Nyangadzayi Musuka dd632975f8 fix(cpu): properly decode multiply instructions 2022-01-30 02:16:12 -04:00
Rekai Nyangadzayi Musuka a459d4b433 feat(cpu): implement ARM multiply instructions 2022-01-30 02:04:24 -04:00
Rekai Nyangadzayi Musuka 6c008ce950 fix: allow 32-bit writes to DISPCNT 2022-01-30 01:42:54 -04:00
Rekai Nyangadzayi Musuka 8d1df7ae43 fix(cpu): properly decode ldm stm thumb instructions 2022-01-30 01:12:34 -04:00
Rekai Nyangadzayi Musuka 6ffaf12804 fix(cpu): properly decode THUMB PUSH and POP at comptime 2022-01-30 00:16:13 -04:00
Rekai Nyangadzayi Musuka dc6931639f fix(cpu): don't ignore 11th bit of THUMB BL offset 2022-01-29 23:53:40 -04:00
Rekai Nyangadzayi Musuka e18f10126e feat(cpu): implement thumb push / pop and stub format 13 thumb instrs 2022-01-29 23:22:10 -04:00
Rekai Nyangadzayi Musuka 0598ba402d feat(cpu): implement THUMB format 9 loads / stores 2022-01-29 22:34:40 -04:00
Rekai Nyangadzayi Musuka b8a9aaee86 fix(cpu): resolve issues with unexpected PC value in THUMB 2022-01-29 22:07:36 -04:00
Rekai Nyangadzayi Musuka 00058f6094 feat(cpu): implement THUMB ldmia stmia 2022-01-29 21:10:14 -04:00
Rekai Nyangadzayi Musuka 2dde47318c chore: implement THUMB format 4 instructions 2022-01-29 20:42:13 -04:00
Rekai Nyangadzayi Musuka ae4023e51c chore: dedup code in THUMB instructions 2022-01-29 20:05:27 -04:00
Rekai Nyangadzayi Musuka bce067557f chore: refactor and genericize ARM data processing calculations 2022-01-29 19:40:58 -04:00
Rekai Nyangadzayi Musuka e0acabf050 chore: relocate barrel_shifter zig file 2022-01-29 18:52:16 -04:00
Rekai Nyangadzayi Musuka 599e068c7e feat(cpu): implement format2 THUMB instructions 2022-01-29 18:46:27 -04:00
Rekai Nyangadzayi Musuka 4ca65caef0 feat(cpu): implement format19 THUMB instructions 2022-01-29 18:25:50 -04:00
Rekai Nyangadzayi Musuka 0c49bf2288 chore: account for THUMB BL instruction when mimicking mGBA logs 2022-01-29 18:14:00 -04:00
Rekai Nyangadzayi Musuka 44dbdba48c feat(cpu): implement format16 THUMB instructions 2022-01-29 17:44:04 -04:00
Rekai Nyangadzayi Musuka d85e0c8d05 feat(cpu): implement format 1 THUMB instructions 2022-01-29 17:29:30 -04:00
Rekai Nyangadzayi Musuka 995633e9e8 fix: dont close file handle early 2022-01-29 01:18:45 -04:00
Rekai Nyangadzayi Musuka cfbd292edc feat(cpu): implement format 6 THUMB instructions 2022-01-29 01:18:41 -04:00
Rekai Nyangadzayi Musuka 95efb3f35d chore: rename title 2022-01-28 23:27:03 -04:00
Rekai Nyangadzayi Musuka 6a6dccf4d8 chore: refactor GBA Display Timings 
This change should reflect that the Hblank bit of DISPSTAT is toggled on all scanlines
while also ensuring that the Vblank bit is set on all Vblank scanlines
 2022-01-28 22:58:19 -04:00
Rekai Nyangadzayi Musuka ad1db4dc2e chore: move a single statement lol 2022-01-28 22:57:48 -04:00
Rekai Nyangadzayi Musuka 19359f7ee4 chore: mark indexing methods as inline 2022-01-28 17:11:29 -04:00
Rekai Nyangadzayi Musuka 24f0922f86 feat: create emulator thread 2022-01-28 16:33:38 -04:00