Backplanes

I've made three different backplanes, two are buffered and replicas of the original Acorn 8-Slot and 14-Slot Backplanes which I have, the third is an unbuffered backplane for a System 5.

I haven't found an original Acorn schematic for the Backplane, there is a little information in the System 2 Technical Manual.

My 8-Slot Backplane is a good copy of the original Acorn 8-Slot Backplane, this was a single sided PCB and only tracked the Side A connections.  I have also tracked side-B on the top side of the PCB.  The 12-Slot Backplane is simply a stretched version of the 8-Slot.

The 10-Slot Unbuffered Backplane simply tracks both A and B sides across all 10-Slots, it is intended for use in a System 5 as the 6502A CPU Board already has on-board buffers.

Schematics

Bill Of Materials

Blank Backplane 8-Slot

Blank Backplane 8-Slot

 

Blank Backplane 12-Slot

Blank Backplane 12-Slot

 

Blank Backplane 10-Slot Unbuffered

Blank Backplane 10-Slot

 

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