The document discusses the Spectranet project, which aims to bring internet access to ZX Spectrum computers through the Wiznet W5100, a component designed for 8-bit systems. It covers the prototyping of the Spectranet, including breakout boards and software features like a network operating system, filesystem support, and C language support. The final product enables TCP/IP offloading, making it ideal for older hardware.

1. Going online with 48K and a rubber keyboard...
The Spectranet – A project to bring
the Internet to the ZX Spectrum

2. Inspiration

3. Inspiration

4. From Inspiration to Implementation
The Wiznet W5100
Released in 2007
Designed for 8 bit systems
Addressable as either memory or IO
Integrated ethernet MAC and PHY
100Mbit/sec
Offloads TCP/IP from main CPU
Perfect for old 8 bit systems!

5. Prototyping the Spectranet

6. Prototyping – The breakout boards
W5100 Ethernet breakout board
Xilinx XC9572XL
breakout board

7. Breadboard prototype of the entire Spectranet

8. The final product

9. The Software
* Network operating system
* Module support
- BASIC extensions
- ZX Channels and streams
- Snapshot manager
* Filesystem support
- TNFS (Tiny Network Filesystem)
* C language support
- C socket library
* Subset of utf-8 (Spanish, French,
German, Portugese)
* Flash configuration support
* Firmware upgrades over the network

10. Demonstration...
(Shamelessly stolen from Pudrete Flanders
www.pudreteflanders.com)