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USB-To-Parallel adapter plausible!

A project log for sdramThingZero - 133MS/s 32-bit Logic Analyzer

Add an old SDRAM DIMM to your SBC for a 133MS/s 32-bit Logic Analyzer, add ADCs for a Scope...

eric-hertzEric Hertz 08/06/2016 at 21:492 Comments
https://hackaday.io/project/10512-potentially-usefulobscure-linux-stuff/log/43345-usb-parallel-port-adapter-low-level-coding-usblpcSet the thing in EPP/ECP-compatible mode, and the interface isn't that much different than, say, an HD44780 Character-LCD.

Discussions

James Newton wrote 08/17/2016 at 16:26 point

Yeah, I've run LCD panels from Parallel ports. That was a few thousand years ago. I seem to remember the setup was a pain, but once you got it going, it was cake. 

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Eric Hertz wrote 08/18/2016 at 04:01 point

Yeah, thing is, though, that USB-Parallel adapters are interfaced with entirely differently than a built-in parallel port... which is why we don't see those ol' parallel-port chip-programmers connected to USB dongles. Ironically, the same thing that makes them less-capable of working with those sorts of devices might be exactly what might make 'em work as the "bus" needed for sdramThingZero. So, am thinking of trying to keep its bus interface compatible with 'em. We'll see. So far it's freezing when trying to send data, so I may be entirely mistaken.

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