TRS-80 curiosity

Peter Cetinski pete at
Fri Apr 14 11:30:33 CDT 2017

> On Apr 14, 2017, at 11:15 AM, Fred Cisin via cctalk <cctalk at> wrote:
> On Fri, 14 Apr 2017, Peter Cetinski via cctalk wrote:
>> The EI expansion port was originally called the Screen Printer port because that was the only accessory that connected directly to the TRS-80 bus.
> Originally.
> Later, the Voice Output device (repackaged Votrax?) used the bus connector.
> Later, the Voice Input device used the bus connector.

Correct, originally.  

Lot’s of 3rd party devices that connected to the bus appeared soon thereafter.  A few interesting ones I have other than the Voice Synthesizer and the Vox Box are an Exatron Stringy Floppy and a Cryptext hardware encryption device.

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