If I disable the bank switching on the JIT core, the game works correctly, which is re-assuring.I think this is because I don't fully support bankswitching if it contains code as I don't think I flush the JITed code.
Looking at the code, it seems we don't actually reset the bank mapping table to their default values on reset. In this case, they are all getting set to &FF, so all point to the same page. I suspect this is the main reason things don't recover properly on reset.
Interestingly, I can actually provoke the same hang on core 0 with the following code:
Code:
10 P%=&300 20[ 30 .remap 40 LDA #&FF 50 STA &FEE7 60 STA &FEE6 70 STA &FEE5 80 STA &FEE4 90 STA &FEE3100 STA &FEE2110 STA &FEE1120 STA &FEE0130 RTS \\ never reached!140]150 CALL remapSo why doesn't the game also induce such a hang in Core 0? I think it's because it uses the indirect addressing mode, and only the absolute addressing mode is supported for writing to hardware registers. I don't think the JIT core has the same restriction.
I think we should probably restore the default mappings on every reset.
Dave
Statistics: Posted by hoglet — Thu Dec 12, 2024 12:04 pm