Commit graph

10 commits

Author SHA1 Message Date
Michel Heily 4f2fbc2af2 More memory map bug fixes (Wrong ROM masks and more)
Former-commit-id: 4149a16965d111fb95629e8381269eae4f84c0c4
2019-11-16 18:17:53 +02:00
Michel Heily c78a111ad4 Implement DMA, WIP
I have fought very hard against the rust ownership model,
In the end for DMA to play nice with my code, I had to resort to use
unsafe code for now..

The DMA implementation itself is not accurate to say the least, but will
have to do for now.

Tonc's dma_demo.gba plays but with a visual glitch.


Former-commit-id: 3b9cdcb2d09c78701290f2c48b77f9f3487e85c9
2019-11-09 19:44:55 +02:00
Michel Heily 3a1d5c10ce Fix many bugs, refactor many things..
Passing: Armwrestler, cpu_test by Dead_Body

Former-commit-id: 80d815d110c5341515dd01c476a0d7e25ecb66a8
2019-11-09 01:06:24 +02:00
Michel Heily acd0e4f338 cpu: Refactor instructions to use explicit cycle counting.
The way cycles were counted up untill now was not accurate enough,
I've avoided doing so because the instruction implementation looks
bloated this way, but I've had problems with cycle accuracy with tonc's
timer demo.

This is not entirely correct though, and I'm 100% sure there are some
mistakes, but works good enough for now.


Former-commit-id: 748faaf99fe2f42925c0a2110192c6a01e5d27d4
2019-08-08 20:05:09 +03:00
Michel Heily d86cc87c79 Add WAITCNT, and refactor cycle calculation
Former-commit-id: e1ee5c9ce1f1db549fddd80907467da51e63b676
2019-08-07 09:50:33 +03:00
Michel Heily c72bbb96fd [WIP] Timers
Seems to work, but the cycle's are not accurate so they run slowly


Former-commit-id: a0b80acb4b68ed64caa535a0ec9f75a081d3aed4
2019-08-05 09:53:41 +03:00
Michel Heily c7dd713605 The big ioregs refactoring.
This commit refactors the ioregs:
* Use bitfield crate to implement the GPU ioregs.
* IoRegs are stored in their own variables bindings (i.e, Gpu related ioregs are now fields of the Gpu struct)
  - This optimize performance quiet alot from my testings - since every scanline was accessing deseralizing ioregs from sysbus. (Getting constant 59fps now)
* For now, comment out DMA model

Also, cleaned the code up to eliminate rustc warnings.


Former-commit-id: 9077695c446ebd1a71783acfdd9819245aa02d7a
2019-08-03 00:24:15 +03:00
Michel Heily 9f0df9af06 optimization: Optimize VRAM accesses from within the gpu.
Not going through the memory mapping anymore.

Also, this commit wraps the gpu pixeldata with a struct


Former-commit-id: d7b706d9de61bac7909e10d6bbe092968e6acc9f
2019-08-02 18:04:35 +03:00
Michel Heily e962150aaf Start working on Interrupts.
it kinda works now, but needs testing.


Former-commit-id: 8510314cce248a737d492d935cf5b48f86d920ed
2019-07-29 01:28:22 +03:00
Michel Heily 53115a9a58 Refactor core functionality into a separate module
Former-commit-id: 5d55b9eb0b63ed7c61465b4e814782165caa5002
2019-07-20 16:46:00 +03:00
Renamed from src/sysbus.rs (Browse further)