Atari 520ST with AERCO easiest Solderless Ram

[Alaskaman]

Does anyone have information on the memory expansion installed on my Atari 520ST.  The PCB is labeled 1987 V.2 AERCO easiest Solderless Ram.  The PCB is halfway populated with KM41C1000AP Chips.

I would like to fully populate the board and was looking for information.

 

Thanks,

 

[Colleton]

Other people have posted asbout this board in the past, you might ask Guitarman if he ever found any documentation: 

 

[ParanoidLittleMan]

Without docs may say: expansion is with 18 pin sockets, so for 1 Mbit DRAM chips with 1 bit data. When populate all sockets - so remaining 16 with compatible chips will have max RAM - 4 MB. But in that case must remove/deactivate existing original 512 KB RAM from mainboard.