o Acorn 32K DRAM technical manual (issue 3, 1982) -
looks to be designed for
the 'system' machines or the Atom.
Yes, the expansion bus on the Atom is almost identical to the 'System'
bus, and most cards work in both machines. The Atom manual mentions that
one 'System' Eurocard can be fitted inside the Atom case. Normal choices
for this were the 32K DRAM card or one of the I/O cards (lab I/O, ADC, etc).
-tony