Moved away from using lazy_static for this one since every access to a
lazy_static reference adds a runtime check, Currently using a build.rs script to generate a const table instead.
Worked out the ARM decoding issues, seems to run fine now.
Though the dynamic decoding for ARM is broken now since I had to change things in Data Processing and MSR instructions
TODO use `const fn` when it becomes stable
Former-commit-id: ba09748ff74a403c7016adcbe0ca553b591f6855
Lookup tables are generally faster than matching in most architectures.
There is some trouble in decoding some arm data processing instructions
so this is non-default feature for now
* Crashes on armwrestler but many games seem to work
Former-commit-id: 3c06ea344ae0097947d8cd5bd05b1f882c7f743a
Initially I began implementing the gdb protocol on my own, but I then found a
nice work-in-progress crate on https://github.com/daniel5151/gdbstub
that suited my needs.
Former-commit-id: f77557cbbd8652c2ed05ac439efc1956d8e99729
Ran cargo-fix to automatically fix most of the build warnings,
Cleaned up dead code, and fix the rest manually
Former-commit-id: f35faba46b40eaf9c047efb8ab1e77ffa24d41b6
This change fixes#9 and emulates:
- Correct layer ordering
- Correct emulation of blending sfx
- Correct emulation of the object window (BIOS boot animation is now fixed)
Former-commit-id: caf46fe4b62cc54e6f2c02a8001da552f8e6b54a
Profiling GameBoyAdvance::frame shows that it spends way too much time idleing
on SoundController::update & Gpu::step waiting for the cycle count to
reach to the next event, Consuming cpu time for the Arm7tdmi core.
This commit changes the implementation of the main loop functions so
that the CPU will run as many cycles as possible and the peripherals
will only be updated when needed.
The is a performance improvement of roughly 50% in fps in some games!
Former-commit-id: 937e097f958423934c70b7face6b6b02926b7a51
This module is written purely and always breaks when changes are being
made into the 'core' module, so as long as I don't use it, I don't feel
like maintaining it.
Former-commit-id: f5b18ba54a27d22e8a195dd0912ec9c8f29fa830
Cleanup timer.rs
run cargo fmt
restore debugging continue&frame commands
Fix bug introduced in previous commit causing the bios animation to
hang
Former-commit-id: 188acaa1121503a97f2d3be816f6f57835e17fe1
Fix tons of bug and reimplemented some of the core code.
Add a neat feature for debug builds:
When the cpu "swi 0x55" instruction, a breakpoint is triggered on the
host.
Former-commit-id: 959249df4374327d90b2503d7a45f8d5d27995a6
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
Pipeline code was unreadable up until now, this also fixes a bug:
* Some roms have illegal instructions right after branch instructions, and
the cpu would error trying to decode them because of pipelining.
Former-commit-id: e3201c7b0d2adfc772231a3e2d5909f43c17b50f
