Commit Graph

456 Commits

Author SHA1 Message Date
Rekai Nyangadzayi Musuka 95dd3e3df8 fix(cpu): fix PC offset when barrel shifter and bit 4 of DP is set 2022-01-24 17:52:01 -04:00
Rekai Nyangadzayi Musuka 702ff288d8 fix(cpu): implement S set + rd == 15 case for data processing 2022-01-19 07:46:49 -04:00
Rekai Nyangadzayi Musuka bf36a23722 feat(cpu): implement banked registers 2022-01-19 07:29:49 -04:00
Rekai Nyangadzayi Musuka fc5a3460dd fix(cpu): improve MRS and MSR instructions 2022-01-18 20:17:00 -04:00
Rekai Nyangadzayi Musuka 6177927049 feat(cpu): implement CMN 2022-01-18 15:09:25 -04:00
Rekai Nyangadzayi Musuka 903b75c7c4 fix(barrel_shifter): fix PC being 1 word ahead in barrel shifter 2022-01-18 15:08:29 -04:00
Rekai Nyangadzayi Musuka 8d786cbe25 feat(cpu): Implement RSC 2022-01-18 14:46:57 -04:00
Rekai Nyangadzayi Musuka 212bc9e11d feat(cpu): implement RSB 2022-01-18 14:36:03 -04:00
Rekai Nyangadzayi Musuka 63a57ac954 feat(cpu): implement BIC 2022-01-18 14:28:47 -04:00
Rekai Nyangadzayi Musuka 85dae5e1d7 feat(cpu): implement EOR 2022-01-18 14:27:07 -04:00
Rekai Nyangadzayi Musuka 6189bf0315 feat(cpu): implement ADD 2022-01-18 14:25:29 -04:00
Rekai Nyangadzayi Musuka 2f3213f693 feat(cpu): implement fix for ADC and implement SBC 2022-01-18 14:20:01 -04:00
Rekai Nyangadzayi Musuka a62cd9aa40 chore(barrel_shifter): remove panic from ASR 2022-01-18 14:19:58 -04:00
Rekai Nyangadzayi Musuka 25c57a4cc7 fix(barrel_shifter): should not modify cpsr when amount == 0 2022-01-18 13:30:41 -04:00
Rekai Nyangadzayi Musuka a7a44c4463 chore(cpu): refactor the barrel shifter once again 2022-01-17 15:55:55 -04:00
Rekai Nyangadzayi Musuka d4d2fedfbe feat(cpu): implement ADC
ADC interacting w/ the Barrel Shifter is not working though
2022-01-17 14:29:34 -04:00
Rekai Nyangadzayi Musuka 483e149b32 feat(cpu): implement RRX for Barrel Shifter 2022-01-17 14:19:40 -04:00
Rekai Nyangadzayi Musuka 85ffdf44f5 feat(cpu): implement SUB in THUMB format 3 2022-01-17 11:36:02 -04:00
Rekai Nyangadzayi Musuka 9098a55ae3 feat(cpu): implement ARM SUB in data processing 2022-01-17 11:35:41 -04:00
Rekai Nyangadzayi Musuka c0d956ea95 feat(cpu): implement MVN 2022-01-17 11:30:59 -04:00
Rekai Nyangadzayi Musuka 1025500407 chore(cpu): refactor barrel shifter 2022-01-17 11:17:04 -04:00
Rekai Nyangadzayi Musuka d05a924420 fix(cpu): use barrel shifter in data processing immediates 2022-01-17 11:02:34 -04:00
Rekai Nyangadzayi Musuka 2a416fb2c6 feat(cpu): implement format 12 thumb instructions 2022-01-17 10:07:50 -04:00
Rekai Nyangadzayi Musuka ea5f0ce552 feat(cpu): implement some already decoded format 3 instructions 2022-01-17 09:29:11 -04:00
Rekai Nyangadzayi Musuka e55d2dc323 feat(cpu): implement THUMB format 5 instructions 2022-01-17 09:28:46 -04:00
Rekai Nyangadzayi Musuka 3037407ebe chore: mgba log now supports printing THUMB instructions 2022-01-17 07:18:44 -04:00
Rekai Nyangadzayi Musuka 1915d98bdd feat(cpu): implement like 1 THUMB instruction 2022-01-16 12:46:59 -04:00
Rekai Nyangadzayi Musuka 4606a1ab25 chore: distinguish between undefined ARM and THUMB instr 2022-01-14 05:30:32 -04:00
Rekai Nyangadzayi Musuka 0cf052838d chore(cpu): lay groundwork for THUMB instruction decoding and execution 2022-01-14 05:23:16 -04:00
Rekai Nyangadzayi Musuka ae37b1218b chore(cpu): refactor ARM functions to make room for THUMB 2022-01-14 04:26:09 -04:00
Rekai Nyangadzayi Musuka 070322064d fix(cpu): fix conditions for GT cond 2022-01-14 04:19:54 -04:00
Rekai Nyangadzayi Musuka 37bd6758fb fix(cpu): fix imm value calculation in MSR 2022-01-14 04:08:04 -04:00
Rekai Nyangadzayi Musuka 7f6ab626d9 fix(cpu): resolve off-by-one error when executing LDM 2022-01-14 03:43:03 -04:00
Rekai Nyangadzayi Musuka 77dba68a0b feat(cpu): implement branch and exchange
If I want to continue with armwrestler, I'll have to implement
THUMB instructions now
2022-01-12 07:20:24 -04:00
Rekai Nyangadzayi Musuka 7adc7c8802 fix(cpu): make Data Processing instructions r15-aware 2022-01-12 07:20:24 -04:00
Rekai Nyangadzayi Musuka 229f7c3388 fix(cpu): make LDRH and STRH aware of r15 2022-01-12 07:20:21 -04:00
Rekai Nyangadzayi Musuka 5812b9713c fix(cpu): account for r15 in LDR and STR instructions 2022-01-12 06:16:59 -04:00
Rekai Nyangadzayi Musuka 98c5803208 fix(cpu): flip two branches in PSR Transfer execution 2022-01-12 06:16:34 -04:00
Rekai Nyangadzayi Musuka 74abd3df4d feat(cpu): implement MSR and MRS 2022-01-12 04:48:57 -04:00
Rekai Nyangadzayi Musuka 7531af7f2b feat(cpu): stub PSR Transfer instructions 2022-01-12 03:40:51 -04:00
Rekai Nyangadzayi Musuka 1c173eb4b8 chore(io): implement IE and IME 2022-01-12 02:19:26 -04:00
Rekai Nyangadzayi Musuka 769c67b9d4 chore: remove some magic constants 2022-01-12 00:46:20 -04:00
Rekai Nyangadzayi Musuka c1be53bcb2 fix(bus): remove accidental recursion 2022-01-10 21:25:45 -04:00
Rekai Nyangadzayi Musuka 072a66cfdb fix(cpu): write results of ORR to destination register 2022-01-10 10:56:41 -04:00
Rekai Nyangadzayi Musuka ed3bdd90fb feat(cpu): implement TEQ 2022-01-10 08:09:02 -04:00
Rekai Nyangadzayi Musuka e9c1c94cae feat(cpu): Implement ORR 2022-01-10 08:06:00 -04:00
Rekai Nyangadzayi Musuka 0f08ad05be feat(bus): implement IWRAM and EWRAM 2022-01-10 07:59:21 -04:00
Rekai Nyangadzayi Musuka fd5006b29d fix(ppu): properly access Mode 4 palette 2022-01-10 07:23:54 -04:00
Rekai Nyangadzayi Musuka 22b95b2a74 feat(cpu): refactor LDM/STM 2022-01-10 06:51:32 -04:00
Rekai Nyangadzayi Musuka 7d79a0bee2 feat(cpu): implement LDM/STM 2022-01-10 06:27:36 -04:00
Rekai Nyangadzayi Musuka 6c0651ca08 chore(io): DISPSTAT bits 3 and 4 better match GBATEK documentation 2022-01-10 06:26:42 -04:00
Rekai Nyangadzayi Musuka 0d8c5e6882 fix(cpu): fix off-by-word bug in BL 2022-01-10 06:26:02 -04:00
Rekai Nyangadzayi Musuka 89a8fe403b feat(bus): have VCOUNT be addressable on the bus 2022-01-10 03:35:28 -04:00
Rekai Nyangadzayi Musuka 7c5d2d2389 feat(ppu): implement Mode 4
Implementation is not tested. Pending on LDM and STM so that I can
run beeg.gba
2022-01-10 03:35:24 -04:00
Rekai Nyangadzayi Musuka 2467b94dbd chore(io): rename some io bitfield fields 2022-01-10 02:13:25 -04:00
Rekai Nyangadzayi Musuka 0d4c850218 chore: remove premature inlines 2022-01-10 01:24:14 -04:00
Rekai Nyangadzayi Musuka bbe2ecfa53 chore: add FPS counter 2022-01-10 01:22:55 -04:00
Rekai Nyangadzayi Musuka c54145ce3c chore: improve code clarity 2022-01-09 23:34:33 -04:00
Rekai Nyangadzayi Musuka ead6d1ce49 feat(ppu): improve timings + implement BG mode 3 bitmap 2022-01-09 22:16:34 -04:00
Rekai Nyangadzayi Musuka 581285a434 fix: allocate framebuf on heap 2022-01-08 20:30:57 -04:00
Rekai Nyangadzayi Musuka 0d203543ca chore: add code for heap alloc of white texture 2022-01-08 18:52:11 -04:00
Rekai Nyangadzayi Musuka eb6c00f0ac chore(gui): switch from RGBA8888 to BGR5555 to match BG Mode 3 2022-01-08 04:54:39 -04:00
Rekai Nyangadzayi Musuka da7f21f47e feat: draw white texture using SDL2 2022-01-07 22:46:17 -04:00
Rekai Nyangadzayi Musuka 8fb666624f fix(ppu): deallocate palette RAM on cleanup 2022-01-07 22:27:08 -04:00
Rekai Nyangadzayi Musuka 568c374131 chore: code cleanup 2022-01-07 20:00:42 -04:00
Rekai Nyangadzayi Musuka 910745f442 chore(bus): refactor bus.zig 2022-01-07 19:49:58 -04:00
Rekai Nyangadzayi Musuka f8c6af3247 chore: refactor instruction exec code 2022-01-07 19:44:48 -04:00
Rekai Nyangadzayi Musuka a407671de2 chore(io): alias @This() to Self in io.zig 2022-01-07 19:34:54 -04:00
Rekai Nyangadzayi Musuka e9ec124e33 chore: refactor bios.zig and pak.zig 2022-01-07 19:33:49 -04:00
Rekai Nyangadzayi Musuka 9f64804763 fix: by convention deinit() should not take pointers to self 2022-01-07 19:16:23 -04:00
Rekai Nyangadzayi Musuka c6123d8a6d feat: implement PPU Timings in Scheduler 2022-01-05 21:18:33 -04:00
Rekai Nyangadzayi Musuka f709458638 feat(sched): add HBlank and VBlank events to the scheduler 2022-01-05 17:34:59 -05:00
Rekai Nyangadzayi Musuka 5037b8f0cc feat: implement S (when rd != 15) for several data processing instructions 2022-01-05 15:45:52 -05:00
Rekai Nyangadzayi Musuka 28a70d0112 feat: implement dedicated Barrel Shifter SHL and SHR 2022-01-05 13:58:11 -05:00
Rekai Nyangadzayi Musuka 7473ffedc7 chore: stub TST 2022-01-04 04:08:02 -06:00
Rekai Nyangadzayi Musuka 172f3e8efe chore: comment-out logging by default 2022-01-04 03:58:11 -06:00
Rekai Nyangadzayi Musuka 28bb410dfd fix(cpu): improve LDR/STR write-back logic 2022-01-04 03:55:41 -06:00
Rekai Nyangadzayi Musuka 5ea888f68c feat(bus): implement Palette RAM and DISPSTAT 2022-01-04 03:29:56 -06:00
Rekai Nyangadzayi Musuka 8b9a80b279 fix(bus): restrict Game ROM and VRAM to a 16-bit bus 2022-01-04 03:08:12 -06:00
Rekai Nyangadzayi Musuka ed9c1413b1 fix(cpu): properly implement SUB/CMP CSPSR carry bit condition 2022-01-04 03:08:08 -06:00
Rekai Nyangadzayi Musuka 8cabcd8901 fix(cpu): resolve reversed if statement + write back on W = 0 2022-01-04 01:57:37 -06:00
Rekai Nyangadzayi Musuka 8d8cedea59 chore: add mgba compatible (minus disasm) log function 2022-01-04 01:11:53 -06:00
Rekai Nyangadzayi Musuka 0f827fca96 chore: rename CPSR u32 from val to raw 2022-01-03 22:25:11 -06:00
Rekai Nyangadzayi Musuka 1fefd4de5c chore: remove print statements 2022-01-03 21:30:08 -06:00
Rekai Nyangadzayi Musuka 3aa680ab8c chore: remove all memory leaks 2022-01-03 20:08:55 -06:00
Rekai Nyangadzayi Musuka 8257a3899a feat(ppu): implement VRAM 2022-01-03 19:52:10 -06:00
Rekai Nyangadzayi Musuka 1d4ba2e2b3 fix(emu): prevent infinite loop when advancing scheduler 2022-01-03 19:51:55 -06:00
Rekai Nyangadzayi Musuka c9f0e1632c fix(io): fix DISPCNT is at wrong IO address 2022-01-03 17:49:15 -06:00
Rekai Nyangadzayi Musuka 44d52d8137 feat(cpu): properly implement STR STRH and STRB 2022-01-03 17:48:43 -06:00
Rekai Nyangadzayi Musuka dee0e113d8 feat(cpu): implement skipBios method 2022-01-02 14:58:39 -06:00
Rekai Nyangadzayi Musuka eb37d73cb2 chore: panic on read from BIOS
GBA Bios requires a lot of implemented features, so we're ignoring it
for now
2022-01-02 14:57:59 -06:00
Rekai Nyangadzayi Musuka 1c42d1795a feat(bus): add Io Struct
Also, add more information to all panic messages
2022-01-02 14:40:49 -06:00
Rekai Nyangadzayi Musuka 01d6399dfb chore: rename consturctors to fit convention 2022-01-02 13:58:57 -06:00
Rekai Nyangadzayi Musuka f09f814dc3 chore: move bitfield library to lib director
I'd presonally prefer to use a git submodule here but It doesn't quite
seem like git submodules are possible for individual files. I'll have to
check with FlorenceOS every once and a while to ensure that there are no
lingering soundness issues with the library.

Thanks to @N00byEdge for this wonderful library!
2022-01-02 13:19:09 -06:00
Rekai Nyangadzayi Musuka de9045fba3 chore: use bitfield library 2022-01-02 13:01:11 -06:00
Rekai Nyangadzayi Musuka e144261e07 feat(bus): emu is now able to read from user-provided BIOS 2022-01-02 03:16:03 -06:00
Rekai Nyangadzayi Musuka 65c3dd722c feat(bus): implement Gameboy Advance MMIO 2022-01-02 02:36:06 -06:00
Rekai Nyangadzayi Musuka b63eb2dabc feat: implement ROM CLI argument 2022-01-01 23:37:21 -06:00
Rekai Nyangadzayi Musuka 52e367d24a fix(cpu): purposely overflow when calculating PC during branch 2022-01-01 21:57:52 -06:00
Rekai Nyangadzayi Musuka cc7e42efd8 feat(cpu): implement condition field behaviour 2022-01-01 21:56:58 -06:00
Rekai Nyangadzayi Musuka c40a1af534 chore: conform to zig style guides 2022-01-01 21:08:47 -06:00
Rekai Nyangadzayi Musuka f2cc0721c7 chore: run zig fmt 2022-01-01 03:42:20 -06:00
Rekai Nyangadzayi Musuka 92a06e49c3 chore(cpu): iron out some false assumptions 2022-01-01 03:41:50 -06:00
Rekai Nyangadzayi Musuka c660ca8922 feat: implement LDR STR 2021-12-29 17:16:32 -06:00
Rekai Nyangadzayi Musuka 7cc3f40a85 chore: run zig fmt 2021-12-29 15:13:50 -06:00
Rekai Nyangadzayi Musuka 5b3b81e4dc Initial Commit 2021-12-29 15:09:00 -06:00