Casio fx-9750GII calculator used as a webserver @Toble_Miner @Manawyrm
The web page http://fxip.as203478.net/ is hosted on a Casio fx-9750GII graphical calculator, running a SuperH SH4 processor.
The software is a port of the uIP TCP/IP stack, using SLIP over the 3pin 2.5mm serial port.
How is this done?
fxIP is a TCP/IP / IPv4-capable network stack for Casio fx-series (9750GII, 9860G) graphical calculators.
It connects to a network via the 2.5mm serial (5V UART) port on the calculators and
uses SLIP (similar to PPP) encapsulation to transmit IP packets over serial.
Example applications for fxIP include a graphical IRC client, a webserver and a small TCP hello world program. Other application can be built and tested against uIP/Protosockets. It (currently) requires calculators with a SuperH SH4a CPU, needs quite a bit of SRAM (32+ KiB). The older models are currently not supported (less RAM, different UART register offsets), but support is should be possible with a bit of careful tweaking.
You can see the calculator dialing in to a server as a terminal in the video here and as an IRC client here.
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