4 ms·
GPIB, a bus system from the mid 60s, requires a response time of <100 ns to a particular signal. That's one of the reasons why it's still practically impossible
by blattimwind 7y ago
GPIB, a bus system from the mid 60s, requires a response time of <100 ns to a particular signal. That's one of the reasons why it's still practically impossible to implement in software only 50 years later.
- ddingus 7y agoAnd we hit that on tech of the era too. Damn cool.
- blattimwind 7y agoWe had discrete logic in the late 60s that achieved toggle rates of a couple hundred MHz (ECL), it was just kinda expensive and needed loads of power. It was (and afaik still is) however widely used in aerospace/military applications (high standing currents and low impedance transmission lines probably make for excellent radiation and interference immunity) and used to be common in high end high frequency test equipment (e.g. counter/timers, synthesizers). I've heard ECL was also very popular for implementing cryptographic devices due to its low noise / switching transients.