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March 2020

A USB Loader for the Cidco MailStation

posted to writings on mar 31st, 2020 with tags hardware, mailstation, and z80

Last year I wrote about the Cidco MailStation and how I was using it as a Z80 development platform. One of the biggest hurdles to running code on them is that it must be uploaded over the MailStation's parallel port with a LapLink cable and some custom software (although it's certainly easier than having to pull and flash a chip).

I recently created a USB data loader device that allows for easier development from a modern computer and implements the MailStation's custom data encoding routines in its firmware.

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May 2019

Cidco MailStation as a Z80 Development Platform

posted to writings on may 3rd, 2019 with tags hardware, mailstation, retro, and z80 and commented on seven times

The Cidco MailStation is a series of dedicated e-mail terminals sold in the 2000s as simple, standalone devices for people to use to send and receive e-mail over dialup modem. While their POP3 e-mail functionality is of little use today, the hardware is a neat Z80 development platform that integrates a 320x128 LCD, full QWERTY keyboard, and an internal modem.

After purchasing one (ok, four) on eBay some months ago, I've learned enough about the platform to write my own software that allows it to be a terminal for accessing BBSes via its modem or as a terminal for a Unix machine connected over parallel cable.

Continue reading 2,392 words...