Technician Operating Early Computer System with Punched Paper Tape, San Francisco State College, November 1971 (Updated last week)

Information

• Identifier: TP-ATA-1923
• Date: Nov 1971
• Context: <p><strong>Computer Console (bottom center)</strong></p> <ul> <li>This is the <strong>operator control console</strong>, used to input commands and monitor system status.</li> <li>The console has <strong>toggle switches</strong> for manual data/program entry (likely hexadecimal or binary), and <strong>indicator lights</strong> for address, data, and status bits.</li> <li>The keyboard below is for typing commands</li> </ul> <div> <p><strong>Tape Drives (middle &amp; top center)</strong></p> <ul> <li>The two spools with white reels are <strong>magnetic tape drives</strong>, used for loading software, backing up data, or storing large datasets.</li> <li>These tape reels hold data on magnetic strips and are often used to transfer programs or log computational results.</li> </ul> </div> <p><strong>Main System: Control Data 6000 Series Console (likely CDC 6400/6600/7600)</strong></p> <ul> <li>The console interface with rows of toggle switches and status lights is typical of CDC&rsquo;s mid-to-late 1960s mainframes.</li> <li>The tape drives above are used for data storage, loading programs, or backup.</li> </ul> <p><strong>Teleprinter Terminal (Foreground, Right):</strong></p> <ul> <li>That machine is a Teletype Model 33 ASR (Automatic Send-Receive).</li> <ul> <li>It includes a keyboard and paper tape punch/reader.</li> <li>Used to communicate with the mainframe via command-line input and to produce hardcopy output.</li> </ul> </ul> <p><strong>Wired Panel (Far right side, upper section):</strong></p> <ul> <li>That densely packed, spaghetti-like module is most likely a wire-wrapped backplane, part of the computer&rsquo;s logic/control unit or memory array.</li> <ul> <li>Wire-wrapping was a common method of connecting logic circuits before printed circuit boards (PCBs) took over.</li> <li>This area might house core memory or custom programmable control logic (possibly peripheral or CPU micro-instructions).</li> </ul> </ul> <p style="caret-color: #000000; color: #000000; font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 11px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration: none;"><strong>Credits:</strong>&nbsp;</p> <p style="caret-color: #000000; color: #000000; font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 11px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration: none;">Some technical descriptions and historical interpretations were developed with the assistance of ChatGPT, an AI language model by OpenAI.</p>
• Geographic Coverage: San Francisco, CA
• Temporal Coverage: 1970s
• Type: Still Image
• Format: Negative
• Source: San Francisco State University Archives
• Rights: Public