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433 Commits

Author SHA1 Message Date
Rekai Nyangadzayi Musuka b76481b34c chore: don't assume 1cpi when stepping by a frame 2022-10-21 05:12:30 -03:00
Rekai Nyangadzayi Musuka 147f6ac9ec Revert "chore: tick on memory access instead of 1cpi" 
This reverts commit 7f555095f2.
 2022-10-21 05:12:30 -03:00
Rekai Nyangadzayi Musuka 84273cbdad chore: tick on memory access instead of 1cpi 2022-10-21 05:12:30 -03:00
Rekai Nyangadzayi Musuka 885f92beeb feat: implement Flash backup cartrige kinds 2022-10-21 05:12:30 -03:00
Rekai Nyangadzayi Musuka f12800f2d0 chore: stub more apu I/O addresses 2022-10-21 05:12:30 -03:00
Rekai Nyangadzayi Musuka a93b335dea fix: account for subset of disallowed chars in save file names 2022-10-21 05:12:29 -03:00
Rekai Nyangadzayi Musuka ad9463dcb9 feat: implement SRAM saving and loading 2022-10-21 05:12:29 -03:00
Rekai Nyangadzayi Musuka 242627199b chore: properly deallocate OAM buffer 2022-10-21 05:12:29 -03:00
Rekai Nyangadzayi Musuka 22a8f67d81 fix: speed percentage in title is now accurate 
We now properly account for full speed being 59.97Hz not, 59Hz or 60Hz
 2022-10-21 05:12:29 -03:00
Rekai Nyangadzayi Musuka 4ee0eed2e5 chore: make some variables const 2022-10-21 05:12:29 -03:00
Rekai Nyangadzayi Musuka 20f39176c6 feat: minor performance improvements 2022-10-21 05:12:29 -03:00
Rekai Nyangadzayi Musuka ed792d71d3 feat: switch from BGR555 to RGBA8888 2022-10-21 05:12:28 -03:00
Rekai Nyangadzayi Musuka c3ae727ed1 fix: improve perf of instructions w/ rotr 2022-10-21 05:12:28 -03:00
Rekai Nyangadzayi Musuka 0116dcdbe1 fix: improve frame limiting and fps counting 2022-10-21 05:12:28 -03:00
Rekai Nyangadzayi Musuka 5ecbcc9f33 fix: implement proper SRAM mirroring and stub Flash 2022-10-21 05:12:28 -03:00
Rekai Nyangadzayi Musuka 2d16e4a4e6 chore: move DMA and Timers from io to bus 2022-10-21 05:12:28 -03:00
Rekai Nyangadzayi Musuka bb9dc45e0c feat: define APU registers 2022-10-21 05:12:27 -03:00
Rekai Nyangadzayi Musuka 9dcecc0d58 fix: move code in scheduler to ppu 2022-10-21 05:12:27 -03:00
Rekai Nyangadzayi Musuka 92e63f5dd6 chore: create different types of emuloops 2022-10-21 05:12:27 -03:00
Rekai Nyangadzayi Musuka 74cda6a1d0 fix: resolve relative sprite priority issues 2022-10-21 05:12:27 -03:00
Rekai Nyangadzayi Musuka d7354cca33 chore: improve accuracy of frame limiter 2022-10-21 05:12:27 -03:00
Rekai Nyangadzayi Musuka 7684cf0f4a chore: improve accuracy of thread sleep in emu thread 2022-10-21 05:12:27 -03:00
Rekai Nyangadzayi Musuka 3994c2c7c8 feat: implement video sync 2022-10-21 05:12:26 -03:00
Rekai Nyangadzayi Musuka a768d28e7c chore: organize io switch statements 2022-10-21 05:12:26 -03:00
Rekai Nyangadzayi Musuka efd99f16e0 fix: mirror SRAM 
SRAM is mirrored in 64K chunks
TODO: According to GBATEK SRAM chips are 32K and mirrored
 2022-10-21 05:12:26 -03:00
Rekai Nyangadzayi Musuka 61d6288fec 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
 2022-10-21 05:12:26 -03:00
Rekai Nyangadzayi Musuka e3e45cd129 feat: implement Timers 2022-10-21 05:12:26 -03:00
Rekai Nyangadzayi Musuka 15191aedca fix: implement sprite coord overflow behaviour 2022-10-21 05:12:26 -03:00
Rekai Nyangadzayi Musuka 63486f13f2 fix: resolve issues with sprite mirroring 2022-10-21 05:12:25 -03:00
Rekai Nyangadzayi Musuka 17455e40d1 feat: Implement MVP of Mode 0 Sprites 2022-10-21 05:12:25 -03:00
Rekai Nyangadzayi Musuka d54e593276 chore: clean up io 2022-10-21 05:12:25 -03:00
Rekai Nyangadzayi Musuka c6a544a824 feat: fix tile flipping issue 2022-10-21 05:12:25 -03:00
Rekai Nyangadzayi Musuka e3ae3635bc chore: add some type definitions for sprites 2022-10-21 05:12:25 -03:00
Rekai Nyangadzayi Musuka 6723bfb364 feat: improve DMA Transfer support 2022-10-21 05:12:25 -03:00
Rekai Nyangadzayi Musuka 12c628e82c chore(ppu): resolve integer overflow regression 2022-10-21 05:12:24 -03:00
Rekai Nyangadzayi Musuka 5f9abf69d3 feat(ppu): implement bg priority and transparency 2022-10-21 05:12:24 -03:00
Rekai Nyangadzayi Musuka 351a687a2d chore: update README.md 2022-10-21 05:12:24 -03:00
Rekai Nyangadzayi Musuka 68b0601a42 chore: replace unnecessarily complex sign extension implementation 2022-10-21 05:12:24 -03:00
Rekai Nyangadzayi Musuka 9455ffe837 feat: pass beeg yoshi 2022-10-21 05:12:24 -03:00
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