RottenDog Williams 9211 MPU for High Speed

RottenDog Williams 9211 MPU for High Speed The board was said to have an issue reporting switches 15, 23, 31. Switch matrix issues caused by a fault on the board will affect an entire column or row. The most probably issue that caused the reported behavior is a break in the row 7 daisy chain of switches. Recall that switch wiring will almost never be in the same order as is shown in the switch matrix chart.