I would have tried 21 MHz as "safe speed" However, if it's all the same, then the source of your problem may be different. Further, are you running the computer with MapROM? Did you activate VBRmove? Are caches enabled/disabled in the WHDload prefs? Are you sure that no software requires an FPU
Yes, I tried that as well. 21MHz, MapROM, even the unprotected mode. When using ACATune -VBRmove it identifies the accelerator as a 1230 @ 28 MHz (!) (no matter the clock speed) and tries to add 62MB of fastmem, The A1200 freezes shortly, goes into Guru Meditation and then reboots. This is kind of weird since I have a 1221ec.
...so an unofficial compilation of files, not the true standard installatino as it comes from the installation disks. Granted, the emulation runs it, and if you really set the same chipset/CPU/FPU/RAM settings, it should work on the real machine as well.
I am going to format everything and try to run clean install of WB3.1 and clean install of WHDLoad, and then clean install of games through WHDLoad installers and only using no-intro ipf-files. But yeah, it will probably take a few days before I have time for that. xD I think this is easier since I have no way of transfering between the old IDE harddrive and my PC.
You might want to try a MaxTransferSize setting of 64k or less. The SD-card adapter is likely to have a very small buffer, so it probably can't handle anything larger than 64k.
Where do I set this up? I added it to WHDLoad.prefs. but yeah, problem still remains.
This can only be a comparison if you set the exact same emulation parameters: CPU, chipset, CPU/FPU and memory, and of course memory, including addressing "all within the lower 24-bit area".
It's kind of hard getting the exact same configuration since you don't have detailed control over clockspeed. just cycle exact or "fast as possible" or by multiplier.
I will try some further investigation down the road, thanks for the help Jens, let me know if the ACATune thing is weird, since it does not recognize my accelerator as the "right one".