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284 Commits

Author SHA1 Message Date
Rekai Nyangadzayi Musuka 02d2ff3e0c fix: palette id is a u16 not a u8 2022-10-21 05:12:24 -03:00
Rekai Nyangadzayi Musuka 02572dd15c feat: DMA Transfer MVP 2022-10-21 05:12:23 -03:00
Rekai Nyangadzayi Musuka 6d253cc74e feat(ppu): implement transparency + backdrop in mode 0 2022-10-21 05:12:23 -03:00
Rekai Nyangadzayi Musuka 4885a86833 chore(io): replace some bitfields with enums 2022-10-21 05:12:23 -03:00
Rekai Nyangadzayi Musuka fd9ffb20b4 fix: better emulate behaviour of IO reads 2022-10-21 05:12:23 -03:00
Rekai Nyangadzayi Musuka 56ef2b077a chore: document select unimplmented I/O registers 
These registers are written to / read from Kirby: Nightmare in Dream Land
 2022-10-21 05:12:23 -03:00
Rekai Nyangadzayi Musuka d4c7cfdf8b feat: impelement a barebones SRAM 2022-10-21 05:12:23 -03:00
Rekai Nyangadzayi Musuka 4d75d156e5 feat: pass retAddr.gba 2022-10-21 05:12:22 -03:00
Rekai Nyangadzayi Musuka d30a4d7ee5 feat: implement Hblank and Vcount Interrupts 
Also implemented unique behaviour when writing to IF
 2022-10-21 05:12:22 -03:00
Rekai Nyangadzayi Musuka d1fce8ba75 chore: improve Bus log + panic messages 2022-10-21 05:12:22 -03:00
Rekai Nyangadzayi Musuka 0f74e4fcf9 chore: improve io.zig 2022-10-21 05:12:22 -03:00
Rekai Nyangadzayi Musuka 4afcbd0957 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
 2022-10-21 05:12:22 -03:00
Rekai Nyangadzayi Musuka 50dc31447d fix: resolve integer overflow in BG0 Drawing 2022-10-21 05:12:22 -03:00
Rekai Nyangadzayi Musuka acf1a10f91 chore: don't panic on 32-bit I/O 2022-10-21 05:12:21 -03:00
Rekai Nyangadzayi Musuka 606f9b959a chore: stub CPU HALTing 2022-10-21 05:12:21 -03:00
Rekai Nyangadzayi Musuka f19b42baf3 chore: correct logic errors in map size 1 and 3 2022-10-21 05:12:21 -03:00
Rekai Nyangadzayi Musuka 2a3d0c8b0d chore: properly write to VOFS and HOFS in 32-bit bus 2022-10-21 05:12:21 -03:00
Rekai Nyangadzayi Musuka 4405fa6bbf feat: implement hofs and vofs on io bus 2022-10-21 05:12:21 -03:00
Rekai Nyangadzayi Musuka e2b2bf882a feat: implement scrolling 2022-10-21 05:12:21 -03:00
Rekai Nyangadzayi Musuka 08e4eb1bf1 feat: add support for multiple BGs in Mode 0 2022-10-21 05:12:20 -03:00
Rekai Nyangadzayi Musuka f4b176a813 feat: document mode 0 2022-10-21 05:12:20 -03:00
Rekai Nyangadzayi Musuka efc7d817db feat: Mode 0 MVP 2022-10-21 05:12:20 -03:00
Rekai Nyangadzayi Musuka 1b17b1eb0c chore: use zig slices for fun 2022-10-21 05:12:20 -03:00
Rekai Nyangadzayi Musuka fab6d4c2a2 chore: give DISPCNT DISPSTAT and VCOUNT to PPU struct 2022-10-21 05:12:20 -03:00
Rekai Nyangadzayi Musuka 223a3403c0 chore: give io read/write functions access to the entire Bus 2022-10-21 05:12:20 -03:00
Rekai Nyangadzayi Musuka dfd0d064de feat: implement BG Scrolling Registers 2022-10-21 05:12:19 -03:00
Rekai Nyangadzayi Musuka 0c4882e658 feat: impelemnt BG0,1,2CNT and IF 2022-10-21 05:12:19 -03:00
Rekai Nyangadzayi Musuka bfdad9fa32 feat: implement OAM 2022-10-21 05:12:19 -03:00
Rekai Nyangadzayi Musuka 37fd8dab84 chore: squash bugs preventing swi_demo.gba from working 2022-10-21 05:12:19 -03:00
Rekai Nyangadzayi Musuka c143aefb01 chore(cpu): reimplement bank switching logic 2022-10-21 05:12:19 -03:00
Rekai Nyangadzayi Musuka 05bf245b5a fix: don't mask away MSB in THUMB.5 add 2022-10-21 05:12:19 -03:00
Rekai Nyangadzayi Musuka f9e7128061 fix: properly decode format 11 instructions 2022-10-21 05:12:18 -03:00
Rekai Nyangadzayi Musuka 603e4b6fdf chore: make use of scoped logging 2022-10-21 05:12:18 -03:00
Rekai Nyangadzayi Musuka 599a1f2973 chore: remove TODOs and some useless imports 2022-10-21 05:12:18 -03:00
Rekai Nyangadzayi Musuka 22424ca69c fix: improper condition check and initialization of register 2022-10-21 05:12:18 -03:00
Rekai Nyangadzayi Musuka 67a785cc22 fix(cpu): force align thumb and arm block data transfers 2022-10-21 05:12:18 -03:00
Rekai Nyangadzayi Musuka 4eb3842606 feat: pass arm.gba 2022-10-21 05:12:17 -03:00
Rekai Nyangadzayi Musuka 1ee8b51b2b chore: reimplement ARM LDM/STM 2022-10-21 05:12:17 -03:00
Rekai Nyangadzayi Musuka 130310e5cc chore: improve arm ldm/stm 2022-10-21 05:12:17 -03:00
Rekai Nyangadzayi Musuka e933d7e5c7 fix(cpu): force-align SWP reads and writes 2022-10-21 05:12:17 -03:00
Rekai Nyangadzayi Musuka 44e8b5b882 fix: force-align ARM STRH reads 2022-10-21 05:12:17 -03:00
Rekai Nyangadzayi Musuka 28361e8b7d fix: implement the same LDRSH logic as THUMB LDRSH 2022-10-21 05:12:16 -03:00
Rekai Nyangadzayi Musuka 75921d6413 fix: PC is 12 ahead when it is rd in str and strb 2022-10-21 05:12:16 -03:00
Rekai Nyangadzayi Musuka 17226d8f75 fix: listen to my past self 
By deleting this line I go from test 234 to test 355 in arm.gba
 2022-10-21 05:12:16 -03:00
Rekai Nyangadzayi Musuka 2cb1bf834a chore: dont use std.mem.bytesToValue 
the stdlib accounts for endianness, which isn't something we want.
 2022-10-21 05:12:16 -03:00
Rekai Nyangadzayi Musuka 8006ca31e6 chore: remove unnecessary @as calls 2022-10-21 05:12:16 -03:00
Rekai Nyangadzayi Musuka 82b92b4733 feat: pass thumb.gba 2022-10-21 05:12:15 -03:00
Rekai Nyangadzayi Musuka bf42d3ae2f chore: account for empty rlist in THUMB LDM/STM 2022-10-21 05:12:15 -03:00
Rekai Nyangadzayi Musuka f63ae76931 fix(cpu): handle edge case in LDRSH 2022-10-21 05:12:15 -03:00
Rekai Nyangadzayi Musuka f046787523 chore: reorganize util.zig 2022-10-21 05:12:15 -03:00
Rekai Nyangadzayi Musuka bbd73550e8 fix: zero initialize all allocated memory 2022-10-21 05:12:15 -03:00
Rekai Nyangadzayi Musuka 4776dc0788 Revert "fix: allow for 32-bit reads to KEYINPUT" 
This reverts commit 3a51707280.
 2022-10-21 05:12:14 -03:00
Rekai Nyangadzayi Musuka d8bd6da563 fix: resolve decoding mixup in THUMB format 8 instructions 2022-10-21 05:12:14 -03:00
Rekai Nyangadzayi Musuka b569a32170 fix: allow for 32-bit reads to KEYINPUT 2022-10-21 05:12:14 -03:00
Rekai Nyangadzayi Musuka 06e20666bd chore: refactor ARMv4 decoding 2022-10-21 05:12:14 -03:00
Rekai Nyangadzayi Musuka 36687c5c67 chore: add more debug information to CPU panic method 2022-10-21 05:12:14 -03:00
Rekai Nyangadzayi Musuka dd9b20030a chore: give more descriptive panic messages when changing mode fails 2022-10-21 05:12:13 -03:00
Rekai Nyangadzayi Musuka c0db2a987b chore: clean up THUMB instruction decoding 2022-10-21 05:12:13 -03:00
Rekai Nyangadzayi Musuka c3ff2ed6c1 feat: parse cartridge header 2022-10-21 05:12:13 -03:00
Rekai Nyangadzayi Musuka 271f42cf0e feat: rename ARM and THUMB SWI functions 2022-10-21 05:12:13 -03:00
Rekai Nyangadzayi Musuka 01e15584da chore: group THUMB and select ARM instructions together (same file) 2022-10-21 05:12:13 -03:00
Rekai Nyangadzayi Musuka 17b91db2ef feat: integrate zig-clap with ZBA 2022-10-21 05:12:13 -03:00
Rekai Nyangadzayi Musuka 3e786d02ac fix(cpu): properly decode format 7 and 8 2022-10-21 05:12:12 -03:00
Rekai Nyangadzayi Musuka c8f2db69df fix(cpu): resolve edge cases in THUMB Format 5 2022-10-21 05:12:12 -03:00
Rekai Nyangadzayi Musuka b4e0682801 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
 2022-10-21 05:12:12 -03:00
Rekai Nyangadzayi Musuka af10c1b076 feat(cpu): implement format 13 
While bugs do exist, at this point all THUMB and ARMv4 instructions
have been implemented! Yay!
 2022-10-21 05:12:12 -03:00
Rekai Nyangadzayi Musuka e6a0eab667 feat(cpu): implement THUMB format 17 2022-10-21 05:12:12 -03:00
Rekai Nyangadzayi Musuka 523b9d2736 feat(cpu): implement THUMB format11 2022-10-21 05:12:12 -03:00
Rekai Nyangadzayi Musuka 011d2f2f2a chore: update to latest zig nightly 2022-10-21 05:12:11 -03:00
Rekai Nyangadzayi Musuka c37546d273 chore: progress towards passing ldr/str thumb in armwrestler 2022-10-21 05:12:11 -03:00
Rekai Nyangadzayi Musuka fbedebb938 fix(cpu): properly negate in NEG 2022-10-21 05:12:11 -03:00
Rekai Nyangadzayi Musuka 1773a3acc8 fix(cpu): reimplement THUMB offset shifts 2022-10-21 05:12:11 -03:00
Rekai Nyangadzayi Musuka 058c02150c fix(cpu): op == 0b00 decodes to add in format 5 2022-10-21 05:12:11 -03:00
Rekai Nyangadzayi Musuka 8d841ead50 fix(cpu): account for overflow in THUMB alu MUL 2022-10-21 05:12:10 -03:00
Rekai Nyangadzayi Musuka 152dafbdf7 chore: use if-else when decoding THUMB instructions 2022-10-21 05:12:10 -03:00
Rekai Nyangadzayi Musuka 7dbd2fc556 fix(cpu): account for rn in rlist in block data transfer 2022-10-21 05:12:10 -03:00
Rekai Nyangadzayi Musuka 85e0924669 feat: implement LDM/STM behaviour when S is set 2022-10-21 05:12:10 -03:00
Rekai Nyangadzayi Musuka 97919f646d feat(cpu): Pass all LDR/STR ARMwrestler tests 2022-10-21 05:12:10 -03:00
Rekai Nyangadzayi Musuka 696cc1b359 feat(cpu): decode and implement all necessary ARM CPU instructions 2022-10-21 05:12:10 -03:00
Rekai Nyangadzayi Musuka 151de2eab4 feat(cpu): implement ARM SWP and SWPB 2022-10-21 05:12:10 -03:00
Rekai Nyangadzayi Musuka e7f6464564 fix: resolve off by n * 2 when accessing Palette during BG Mode 4 2022-10-21 05:12:09 -03:00
Rekai Nyangadzayi Musuka da681c946e feat(cpu): Implement Multiply Long ARM instructions 2022-10-21 05:12:09 -03:00
Rekai Nyangadzayi Musuka e0e43eece5 fix: no buttons are pressed by default 2022-10-21 05:12:09 -03:00
Rekai Nyangadzayi Musuka 7013389288 feat(cpu): implement format 18 THUMB instructions 2022-10-21 05:12:09 -03:00
Rekai Nyangadzayi Musuka 443520ecae chore: more detailed panic message 2022-10-21 05:12:09 -03:00
Rekai Nyangadzayi Musuka 96d7285111 feat(cpu): implement format 10 THUMB instructions 2022-10-21 05:12:08 -03:00
Rekai Nyangadzayi Musuka 7e6fc44191 feat(cpu): implement SWP 2022-10-21 05:12:08 -03:00
Rekai Nyangadzayi Musuka 9cb4ebaa7f fix(cpu): perform MUL with u64s, throw away upper 32 bits 2022-10-21 05:12:08 -03:00
Rekai Nyangadzayi Musuka 3e4d7e7ed8 feat: implement keyboard input 2022-10-21 05:12:08 -03:00
Rekai Nyangadzayi Musuka 3a6951d93d chore: don't panic on unsupported BG mode 2022-10-21 05:12:08 -03:00
Rekai Nyangadzayi Musuka 391096872e chore: tempoarily disable fps counter 2022-10-21 05:12:08 -03:00
Rekai Nyangadzayi Musuka eebf6fcae4 chore: zero-initialize VRAM 2022-10-21 05:12:07 -03:00
Rekai Nyangadzayi Musuka 8b7223cf35 chore: stub KeyInput I/O register 2022-10-21 05:12:07 -03:00
Rekai Nyangadzayi Musuka e1fec48a0e fix(cpu): properly decode multiply instructions 2022-10-21 05:12:07 -03:00
Rekai Nyangadzayi Musuka 0778ee8dd7 feat(cpu): implement ARM multiply instructions 2022-10-21 05:12:07 -03:00
Rekai Nyangadzayi Musuka 14d5160674 fix: allow 32-bit writes to DISPCNT 2022-10-21 05:12:07 -03:00
Rekai Nyangadzayi Musuka eabf787305 fix(cpu): properly decode ldm stm thumb instructions 2022-10-21 05:12:07 -03:00
Rekai Nyangadzayi Musuka 980e4ff5dd fix(cpu): properly decode THUMB PUSH and POP at comptime 2022-10-21 05:12:06 -03:00
Rekai Nyangadzayi Musuka 1ac193c506 fix(cpu): don't ignore 11th bit of THUMB BL offset 2022-10-21 05:12:06 -03:00
Rekai Nyangadzayi Musuka d6ed071bc6 feat(cpu): implement thumb push / pop and stub format 13 thumb instrs 2022-10-21 05:12:06 -03:00