Notes
Remarks"VDAQ1-HR" stands for "Votem Data Acquisition - Hi-res." It was written originally for the "Votem", which was a simple voltage-to-frequency converter designed for single-channel analog data acquisition using the ZX81. My implementation allows multi-screen acquisition, variable scale and timebase, all that sort of thing. Even without a Votem it was useful for frequency measurement, via the tape input jack. It still could be used for such purposes with a real ZX81, but it's only "something pretty to look at" on an emulator. Although... I suppose you could sample your waveform with your PC, export it to emulator.... naw.. Ain't worth it.