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
90302d1c52
chore: update README.md
2022-03-01 21:30:29 -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
f9013cf9db
Merge branch 'main' of ssh://musuka.dev:2222/paoda/zba
2022-02-10 23:02:35 -04:00
