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Posts by [email protected] |
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Post #AvJHZ4huAycWShvomm by [email protected] |
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Last week, the vintage IBM 1401 computer at the Computer History Museum started… |
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Post #AvJHZ5MJkiwkU2q5mC by [email protected] |
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The IBM 1401 computer lets you run code a single cycle at a time, so you can se… |
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Post #AvJHZ5k4KPwffhx3nU by [email protected] |
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I hooked up an oscilloscope and discovered that the computer wasn't running… |
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Post #AvJHZ66OzNoGmyOtbk by [email protected] |
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You push the green START button on the console to start the computer after a HA… |
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Post #AvJHZ6SNffOHt8gRrk by [email protected] |
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It turned out that the computer's START button had a strand of wire that sh… |
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Post #AvJHZ6pmGg6d3hd8Km by [email protected] |
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With the switch fixed, everything worked. At least until next time...I worked o… |
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Post #AvLF8InbrZQ4kycrI0 by [email protected] |
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@ahltorp The IBM 1401 lets you load memory from the toggle switches, which is c… |
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Post #AvLFHjPkHIvXuMxYoK by [email protected] |
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@TimWardCam It turns out that the debouncing is more complicated than that. The… |
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Post #AvUoPUrhV6Lbv674TY by [email protected] |
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In the 1960s, this absurdly large camera was used to make masks for integrated … |
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Post #AvUoPVZIszE46KVtRI by [email protected] |
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Source: "Semiconductor Integrated Circuits" by Gordon Moore in "… |
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Post #Aw0gichS0v0x96e5k8 by [email protected] |
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The Globus is a navigational instrument that uses a rotating globe to show the … |
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Post #Aw0gicpbWbXJYOSbS4 by [email protected] |
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This photo shows the Globus with its rotating globe and a crosshair showing the… |
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Post #Aw0gicwL7YvLtHbywy by [email protected] |
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Lumafield's scanner is very cool if you want three-dimensional scans of obj… |
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Post #Aw0gid3mfssYGN5vYO by [email protected] |
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And if you'd rather see inside the Globus visually, check out my blog post … |
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Post #Aw1yJn0sWaW4E306hE by [email protected] |
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@mattblaze Yes, old globes have that nice style. An interesting thing about the… |
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Post #Aw3nzxFi8RoaxslHg8 by [email protected] |
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NASA used this "Up-Data Link Test Set" to test one of the electronic … |
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Post #Aw3nzxVJCSI9kG3jzU by [email protected] |
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@azonenberg Not much. What's up with you?But seriously, the Up-Data Link (U… |
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Post #Aw3nzximON4EQ2MUzI by [email protected] |
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@csepp @azonenberg There was no encryption on the up-data link. The only part o… |
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Post #Aw3nzxyNSNXnCPexIe by [email protected] |
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Texas Instruments introduced LED-based opto-isolators in 1964. They used an inf… |
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Post #Aw3nzyK09yqEHTmE0O by [email protected] |
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Sources: Texas Instruments ad from Electronics, 1964: https://www.worldradiohis… |
