dillon@CORY.BERKELEY.EDU (Matt Dillon) (09/24/86)
The 6526's had problems when both T1 and T2 timed out within a clock or two of each other... When this happened, one of the interrupt status register bits (I think it was for T1) didn't get set. Caused all sorts of havoc with us poor programmers. Hope that was fixed when you modified them to 8520's. -Matt