[fitzsteve]

Originally Posted by Nikolaj_sofus

so meaning that you can load a kickstart 3.1 image from HD in early startup, and then load os 3.1 on the machine without a physical 3.1 rom?

Yep, thats one of the features of ACA tune.

From Amigakit Blub:

There are more optimizations under the hood that can be selected conveniently with the ACAtune software tool:

The MapRom function allows copying the kickstart-rom (256k, 512k or 1MB) to fastmem and use it like a normal ROM there. This speeds up most operations significantly, because large parts of the operating system are located in the kickstart ROM. The MapRom function is similar to the Fastrom-option that the Amiga OS CPU command offers. However, the ACA630 does not requrie the MMU for that. If you require the MMU for a different use, there will be no conflict.

Re-Kick:
Similar to MapRom, a Kickstart image is stored in Fastmem where it will apear just like a ream ROM chip to the user. The different is that the Re-Kick option does not use the Kickstart ROM as a source, but a file from your harddisk. After a re-boot, the new Kickstart is available, and it stays active until the next power cycle. The ACA acceperators are the first commercially available products that support true 1MB kickstarts!