todo:
                (c64)  rr-rom-integration (countzero)
                (c64)  d64 transfer
                (host) complete documentation
                (host) fix simulator mode
                (host) implement ice-breaker mode
                (host) pc64 support
                (c64)  swithlink/turbo232 support
                (host) PDS-system support
                (host) 65816 support
                (gba)  target stub (jihad)
                (host) reenable support for DDH
                (host) Commslink support

coming next:    (c64)  cbm-fileserver (host+target)
                (host) macos,linux,dos versions