The Mem config disk lets you switch on the ChipMap feature, even if the card is disabled with the J2 jumper. It does nothing else.
ACA1230 owners should update with this menu:
Blizzard stuff is still not officially supported. If it works for you, it's nice and I'm happy for you. However, if you want to switch off the B1260 by holding "2" on startup and don't like the second reset until the action takes place, I can't do anything about it. We don't have further detail documentation about Blizzard cards, and finding out about these details by disassembling the ROM is way too tedious.
I hope I'll find the time to write a few words about all the options in the Wiki later this week. This Xmas business is crazy with orders flying in daily...