I wasn't 100% from reading the documentation if it required 512KB base for some reason, so it's more than likely my misinterpretation of the jumper settings. It would make sense what with there being a Kickstart ROM! I will be ok with 2 1/4 MB, though I suppose that still depends on the software.
If the screen comes up yellow, it means that the front panel RAM expansion is missing when the Kickstart ROM option is selected (This is only included for completeness. In Kickstart RAM (disk) mode, a missing front panel RAM would cause a robin’s egg blue screen). Check to make sure that it is well connected to the A1000 motherboard.
The Amiga custom chip registers, nominally located at DFFXXXH, actually mirror (or tile) all the way down to C00000H or the end of C00000H RAM. The Kickstart ROM, at best, behaves erratically when there is a section in CXXXXXH that is not decoded at all. Usually, the result is a yellow screen. This will happen if the 256K front panel expansion is missing. Since there are two memory possibilities—512K, and 1024K (1 Meg)—two of the combinations of jumpers J101 and J102 ensure that there are no undecoded areas to cause a “Yellow” screen error.
phew that's awesome news since your board will soon be the grandfather of all new boards to come