Inside a BBC Model-A with Econet upgrade.
Rear view of a basic BBC Model-A. Note the BBC Branded Power Supply.
The underside of a totally basic and un-expanded Model-A
Another view of an original un-expanded Model-A motherboard.
Rear view again with no extra ports added, just UHF and BNC Composite output.
Another underside view, with no expansion connectors or PSU Aux output.
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