A580 & A580 Plus Company 3-State, Germany   Date 1990   Amiga A500   Interface trapdoor slot, Gary socket, CPU slot   both versions use the same main board, they differ only in the adapter boards sixteen DIP sockets accept 2 MB RAM supports 256k×4 DIPs (514256), 70 - 80 ns accepts DIPs in groups of four giving 0.5, 1, 1.5 or 2 MB configurations battery backed up clock disable switch the main board connects to the trapdoor slot A580: the adaptor board connects to Gary's socket can use only 1.8 MB RAM of the main board A580 Plus: the adaptor board connects to the 68000's socket can use all 2 MB RAM of the main board requires Fat Agnus 8372A Chip RAM size can be switched between 512 kB and 1 MB Photo front side back side back side Manual A580.pdf (168 kB) user manual (german)