Amiga 1000 ROMoRAMa Expansion
From www.evillabs.net
Introduction
The Amiga 1000 ROMoRAMa board was a prototype that I was working on for my Amiga 1000.
Schematics and logic completed, even built a board, but I got an A1200 before I had a chance to test the board.
ROMORAMA Schematics and PLD code