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.

You can read more about how this is done on this blog post and on the Casio calculator hosted website http://fxip.as203478.net/

 


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