What exactly is the limiting speed factor of the hardfile implementation? We just finished an internal version of the Minimig core for the C-One with harddrive support, working on a real harddrive (in my case, on a DeLock IDE flash module). Without optimization, our performance is 545k per second (see pictures on
www.c64upgra.de/c-one ) - a good 20% faster than what's shown in the Youtube video.
There might be room for improvement as we speed up the CPU, but I don't expect much more, as the CPU is just a plain, 68000, sharing the bus with the chipset and another 68000 CPU.
Minimig on the C-One now has 11 megs of ram and a harddrive. An RTC might be an idea now :-)
Jens