> In the olden days, the interval timer at address 80 could > be updated with an MVC instruction. The new value was > stored at 84, and and 8 byte MVC move from 80 to 76 would > update the timer and return the previous value without > losing any counts.
I was never too sure about this. On the 360/50 under heavy channel load I'm sure I used to miss ticks. -- Phil Payne http://www.isham-research.com +44 7785 302 803
