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32-bit acorn hardware • Re: Dead RiscPC #4 - resistors in VIDC20 control lines rotted near IOMD

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During the "coloured screens" phase, I can't get any signal on Vclk1. Then, when it switches to "no video signal" a steady 24MHz sine wave appears. Its peak to peak voltages are only 300mV to 800mV though.

I don't know what this signal is supposed to look like, but this feels wrong!

Statistics: Posted by jms2 — Sun May 18, 2025 11:11 pm



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