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PDP-4 Computer
The PDP-4 was 18-bit machine intended to be a slower, cheaper alternative to the PDP-1; it was not considered commercially successful. All later 18-bit PDP machines (7, 9 and 15) were based on a similar, but enlarged instruction set, more powerful,…
PDP-9 Core Memory Module (?)
A photo of what is possibly a PDP-9 4K magnetic core memory module / backplane assembly using coincident-current magnetic core memory (see COINC DUAL label)
The top panel shows: DATA ADDRESS Indicators labeled 2048 and 4096
A/B memory sections. …
The top panel shows: DATA ADDRESS Indicators labeled 2048 and 4096
A/B memory sections. …
