Those of you using 68010 Cpu may be interested in the following 
potential pitfall.

Problem description. : The program goes out to lunch when 
returning from interrupt. (RTE instruntion)

Whats happening : The 68010  gets confused as to whether it is 
executing autovectored interrupts or not.

Solution : DTACK should not be asserted while VPA is asserted.

For some unknown reason, this bug has not shown up on System I.
However, on Gauntlet, using almost the same circuitry, the 
problem showed up immediately. System IV has had some occurances 
of the same problem.
     			Pat McC.