lightrec
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pcercuei
Support for other MIPS cpus
Considering adding support for other cpus? PSP cpu is quite similar for example
i thought you should ask. :D
I have a very basic psp emu with 1 demo working (using simple mips I instructions should be easy )
https://github.com/georgemoralis/pcsp-minifire-port
this is a WIP progress for my psp emulator on ( https://github.com/georgemoralis/pcsp)
I see several points that would need to be worked on:
- the PSP's CPU has more instructions to be emulated, but that won't be the bigger problem.
- the playstation's memory map is kind of assumed everywhere right now
- is CP0 behaving the exact same as in MIPS1?
- the CP2 interface (number of registers, size and behaviour) is assumed to be the playstation's GTE
- CP1 emulation would be completely new
- How would the MPU be emulated?
- Lightrec has no icache/dcache emulation, just so you know.
- Sure more instructions are needed but i guess that sample is to be more easier atm
- Memory maps (RAM,scratchpad,vram) already exist in memory class ( HW mapping won't be there since emu will be HLE atm)
- CP0 has MFC0,CFC0,MTC0,CTC0,ERET I think it is quire similar
- There isn't GTE , but vfpu
- CP1 exists but atm it is not neccesary
- icache is needed but from my knowledge it is not that critical atm
Maybe should be a different repo for it , since there might be a lot of different to coexist with psx rec
The memory map may exist in your memory class, but unless you want emulation to be a slide-show, the dynarec cannot exit at every I/O opcode to call your memory class functions.
And what would be the use case?
Several mips3 variants (R4600, R4300i, CXD8661R, ...) were used in various consoles and arcade boards, having a portable dynarec that support all/most of them would be interesting.
Closing this issue, as I have no plans of supporting anything else than PS1. If somebody really want this, send me a pull request.