fox33: A WIP fox32 emulator written in c3

Note

It is recommended to build in a nix environment:

$ nix develop --impure

Warning

Don't expect the code to be of great quality for now. I'll clean it up later

todo:

• Fix that 0x04000000 bug (so painful :()
• Run fox32rom successfully
• Initial Gui & see fox32rom framebuffer
• Implement Gui overlays
• I/O stuff:
  • mounting disks
  • mouse
  • keyboard
  • rtc
• Interrupts/Exceptions
• boot fox32os
• Get fox32rom functioning completely
• Get fox32os functioning completely
  • get all fox32os apps functioning (only missing some simple instructions)
• Implement all instructions fully
• MMU
• swap sp so I can run minita
• internal refactoring of error handling
• refactor convenience macros to be more convenient & less awfully hacky (they will bever be entirely hack free tho (cry about my overuse of macros lerno >:3))
• Any other things I can think of

building:

$ c3c build -D <build flag> -O5

build flags:

• DEBUG -> print almost too many debug logs
• PERF -> print the time taken to execute 30M instructions (target <= 1 second for 30Mhz)
• NOWARN -> silence runtime warnings, mostly unimplemented methods
• FOXLOG -> print debug logs in the exact same format as the fox32 reference emulator
• MORE_PERF -> inlines all instructions for a performance boost at the cost of compile-time

usage:

$ ./build/fox33 <boot rom> <disk0> <disk1> <disk2> <disk3> <index out of bounds error>