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USB On-The-Go
>>> 2024-01-06 usb on the go (PDF) USB, the Universal Serial Bus, was first released in 1996. It did not achieve widespread adoption until some years later; for most of the '90s RS-232-ish serial and its awkward sibling the parallel port were the norm for external peripheral.
Back then, when the N770 was a new release, it was challenging to make work and my host explained that the software behind it usually crashed before he finished the demo, and sometimes it turned the output into a high pitched whine and he hadn't quite figured out why yet. A typical OTG cable, which were actually included in the package with enough Android phones of the era that I have a couple in a drawer without having ever purchased one, provides a micro-A connector on one end and a full-size A socket on the other. In fact you almost certainly want to do the latter, because even with Android's extremely half-assed print spooler it's probably a lot more usable than the file browser your printer vendor managed to offer on its 2" resistive touchscreen.
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