The 8K RAM + 8K ROM Board 

"A Eurocard (measuring 100 x 160mm) of high quality fibre glass through hole plated PCB with solder resist and component identification. It has provision for 8K of RAM (2114) and 8K of EPROM (2532).

This card is available with memory options populated in 1K steps in the case of RAM and large variety of ROM or EPROM. This card is fully buffered for use with any system but has the advantage that the inputs of all cards except that being accessed are tri-stated and present no load to the bus. The Eurocard connector carries the bus and address selection by wire links on the card and allows RAM and ROM to be placed independently in any 8K block of memory. The memory card is a natural first step in expansion of the System 1 and provides storage and working memory for programs in the Acorn systems."

Schematics:

• 200.003 Issue 1 24-Mar-1979 [0]

• 200.003 Issue 1 2-May-1979

• 100.003 issue 3 13-Feb-1980 [1]

Documentation:

• 200.003 Technical Manual Issue 3a Mar-1980 [0]

• 200.003 Technical Manual Issue 3a Mar-1980 A5 Booklet [0]

• 200.003 Technical Manual Issue 3b Mar-1980 [2]

Photos:

200.003 Issue 1 [7]

200.003 Issue 3 #1 [0]

200.003 Issue 3 #2 [3 System 3]

200.003 Issue 3 #3 [3 System 3]

200.003 Issue 3 #4 [3 System 4]

Data sheets:

• 2114L

• 2716 Datasheet

• 2516 Datasheet

Replica Boards:

Details of two replica 8K RAM + 8K ROM boards can be found here:

• My replica 8K RAM + 8K ROM Board

• trev_ham replica of 8K RAM + 8K ROM Board

RAM Testing

I have written a suite of programs for testing RAM, RAMTest and also built a simple 2114 Tester using an Arduino.

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