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realizing that probably the reason i know about interrupts is because of 1) the Commodore 641 and later 2) having to worry about manually allocating IRQ lines in the DOS/Windows 9X era, then one day in The Year 2000 i had a computer with onboard sound and usb 1.0 and an internal dialup modem and all that bluster just went away so that’s where my knowledge calcified. how far we’ve come


  1. The Commodore 64 used interrupts to implement certain features, but if I remember right it used polling to read the keyboard2 and talk on the external I/O bus so I really should have learned not to assume

  2. Except for the “restore” key, specifically, which generated an interrupt


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