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Robert
flatduckrecords.co.uk
did:plc:fmi5y56rlk5ok6ggsjrpindp
Here's a handy wee routine by Busy that you can use to enable USR 0 mode. It's a machine code routine but the archived TAP file can just be concatenated onto the front yours to make a universal 48/128 tape file. (Source available too).
https://spectrumcomputing.co.uk/entry/27522/ZX-Spectrum/Usr0x01
2025-09-01T19:23:16.909Z