Here's a little bit closer view of the AdRAM 540 with 560D daughter card attached. The daughter card covers up the top two rows and part of the third row of RAM chips on the main 540 board. In this configuration, the boards provide 6.5 Meg of RAM to the computer, of which 1 Meg is Chip RAM. The other 2 Meg of RAM that the A500 has is on the A2091 card (later pictures and descriptions in this series).