[cctalk] KIM-1 stuck bits from $280 to $29f

Odd fault on my Rev D KIM-1 popped up while writing code this afternoon (initially I thought I had a bug in my paper tape transmitter) - between $0280 and $029f, the upper 5 bits are stuck at zero. The rest of the address range seems fine. In particular, $0080-$009f, $0180-$019f and $0380-$039f work correctly. This doesn't smell like a bad RAM chip to me or I would think there would be a bad bit throughout the entire 1K, so I suspect this is a data bus problem but I'm not sure where to start looking. Any guesses from the group? -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser(a)floodgap.com -- require "std_disclaimer.pl"; -----------------------------------------------