Victorian teletypes can be hooked to a serial port with a trivial adapter, at least enough to use CP/M and most single-case OS'es.

Also, some programming languages have a setting to export code compatible with just Baudot characters: http://t3x.org/nmhbasic/index.html

So, you could feed it from paper tape and maybe Morse too.

> Victorian teletypes

Wait what? There were devices called teletypes in the Victorian era (ending in 1901)? What were they doing?

There's a recent steampunky hacked mashup called a Victorian teletype.

Of more interest, to myself at least, teleprinters have a long history:

* Early developments (1835–1846)

* Early teleprinters (1849–1897)

~ https://en.wikipedia.org/wiki/Teleprinter

Yeah speakers haven’t changed enough to make the 3.5mm connector obsolete.

Many new devices use a 2.5mm audio jack instead of the 3.5mm audio jack.

Yes, but that doesn’t obsolete the 3.5mm jack or the 1/4” jack. It’s just a different form factor of the same thing.