There are several ZX Spectrum IP stacks, e.g. https://github.com/milankowww/ppp_tcpip_zxspectrum https://github.com/milankowww/ppp_tcpip_zxspectrum The more e

There are several ZX Spectrum IP stacks, e.g. https://github.com/milankowww/ppp_tcpip_zxspectrum https://github.com/milankowww/ppp_tcpip_zxspectrum The more elegant solution is probably a Spectranet interface, which does TCP offload: https://www.bytedelight.com/?page_id=3515 https://www.bytedelight.com/?page_id=3515