One interesting thing, the Minimig boot screen (the blue one) states the SPI clock is 7MHz, after booting the menu does not offer the ability to change the CPU speed (unlike the Minimig v1.1 - it remains "normal") and SysInfo reports the CPU speed as 32.30 MHz yet the speed comparisons with an A600 and B2000 are 1.67 and 1.26 respectively.
Thats exactly the point. I know out of a1k.org forum the TG68k core is fixed to 7.09MHz by now. But due to the IP core of the 68000 it is able to process many cpu commands much faster then the real cpu. Therefor sysinfo report a faster cpu then actually present and also some demo/game title show certain problem.
In fact the IP 68000 need a slow-down to match real cpu command cycle time. Its nice to have a "faster" cpu but its not always best especially for oldschool stuff.
Lets make a test with Red Sector megademo (the most familiar one).
If there also is some sound note skip present in most demo part, we have found the reason even for Alien Breed TA etc.
The sound problem appears to be across all software. I just gave Lemmings a go and I don't get the "let's go!" as they leap from the balloon and the sound is definately missing a channel. It really sounds like I'm getting one of the stero audio channels routed through both audio outs with the other stereo channel missing.
I tried "Battleships" which works perfectly on the Minimig v1.1 and that refuses to load past the crack intro... which locks up "upside down".
On a plus side, I reformatted one of the Transcend 2GB cards as FAT32 which wouldn't work before and it boots the new core (won't boot the old core which required FAT16).