The AMRAM has two PCBs sitting on top of each other, joined with a rigid connector.
On the bottom is passthrough for other expansion connectors and a 3V square lithium battery. (The exact replacement battery (40LF220 SAFT Memoguard 3.0V Lithium Encapsulated Cell) is expensive@ £19.49 each. It *is* possible to fit a PC CMOS compatible lithium battery (CR2032) and holder, but it's not as neat and there is not a lot of space between the two pcb boards of the Amram)
On the top, 32K RAM (contents are held by lithium battery so can survive a reset or power off), which can be programmed like ROM and occupies two ROM positions (1 and 2) and also sockets for expansion ROMs up to ROM 7.
This came after the [[AMRAM]] which was 16K ram on a board which could be programmed and which occupied ROM slot 5. More details when I can find them in my documents.
Details of battery in AMRAM 2:
40LF220 SAFT Memoguard 3.0V Lithium Encapsulated Cell
Type: Lithium Manganese Dioxide.
Voltage: 3.0 V.
Height: 28 mm.
Width: 25.4 mm.
Thickness: 6.7 mm.
== Pictures ==