How to get retro computers online in 2025 using only a £12 cable (and a smartphone)
Rationale
There is a great deal of interest in connecting older (read pre-2000) computers to the internet. These computers would generally have come with an RS-232 serial interface which would connect to a modem and thence to a BBS or dial-up internet service.
Various solutions are available to solve this, including Pi-based modem emulators. I propose a simple solution, using only a £12 serial cable and an android phone. This is particularly helpful for portable computers such as my Psion 5mx and Netbook, as it is portable and needs no additional power sources
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