Mario RPG SA-1 HiRom issue

[Slyazku]

Well I have this bad identification of Super Mario RPG, it should be Lowrom. Dump works but CRC fails and I can't read rom file in an emulator. I use HWrev 5 and tried 2 diferent boards of SNES Cic and 2 different clock generators, one working perfectly on HW rev3

[sanni]

The OSCR dumps SA1 as if it was HiROM.

That being said, SA1 code is still far from perfect. One thing you can try is to lower the clocks. A real SNES seems to run at only 5.3MHz for EXT and 2.6MHz for CPU clock when reading SA1:

Change line 484

 if (i2c_found) {
    //Set clocks to standard or else SA-1 sram writing will fail
    clockgen.set_freq(2147727200ULL, SI5351_CLK0);
    clockgen.set_freq(357954500ULL, SI5351_CLK1);
    clockgen.set_freq(307200000ULL, SI5351_CLK2);
  }

to:

  if (i2c_found) {
    //Set clocks to standard or else SA-1 sram writing will fail
    clockgen.set_freq(536931800ULL, SI5351_CLK0);
    clockgen.set_freq(268465900ULL, SI5351_CLK1);
    clockgen.set_freq(307200000ULL, SI5351_CLK2);
  } 

Maybe it helps.

Also make sure you got Rev3 of the Six Slot Adapter or apply the fix for Rev1/Rev2.

[Slyazku]

Sorry for the late answer. Just wanted to let know the fix works perfectly, I can dump the Rom despite the CRC32 Error - Error Database Missing. Thanks !

[sanni]

Which fix you mean the hardware fix for Rev1/Rev2 or do you mean changing the code like shown above?

[sanni]

Duplicate of #734