Service manual

Service Manual
Figure 2-6: Access collision cases PS* while LANCE is in T3
PS* while the LANCE is in T3
In this case READY is still active when the LANCE samples it at the end of T3 (
idle). This is the last time that the LANCE does this for the current cycle so the
LANCE cycle completes before the podule bus cycle starts. Note that the
LANCE is not active on the RAM bus during T4.
Figure 2-7: Access collision cases PS* while LANCE is in T4
PS* while the LANCE is in T4
Since the LANCE does not require the bus during T4 no further wait states are
inserted in the current cycle. However T1 of the next cycle could follow T4 and
one wait state will be inserted into this LANCE access.
Part 2 - Interface cards Issue 2, June 1991 2-9