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chiark · 31 January 2011, 21:12

indeed.

Changed the connector. Nothing.
Changed the transistors (3904s) for known good from another keyboard (C458) - that stopped the Amiga from booting... Not surprising, but interesting that different components are used!
Traced every connection on the 6570, and the two gates... All good.
Made a couple of extra wire connections to make sure of connectivity. No change.

I could change the two gates, but I don't suspect 'em given that the reset circuit works.

At a loss to know what to do. I'm starting to trace every connection...

31 January 2011, 21:12	#45
chiark Needs a life Join Date: Jan 2008 Location: England Posts: 1,707	indeed. Changed the connector. Nothing. Changed the transistors (3904s) for known good from another keyboard (C458) - that stopped the Amiga from booting... Not surprising, but interesting that different components are used! Traced every connection on the 6570, and the two gates... All good. Made a couple of extra wire connections to make sure of connectivity. No change. I could change the two gates, but I don't suspect 'em given that the reset circuit works. At a loss to know what to do. I'm starting to trace every connection...