4 May
2015
4 May
'15
5:38 a.m.
From: Seth Morabito
1. Halt the CPU and enter ODT
I'm too lazy to check to confirm this, but I strongly suspect DMA requests
don't get serviced while the machine is halted. If so, you could use the
following code fragment to avoid that:
0400 12737 MOV #400, @#174400
400
174400
777 BR .
Start at 0400, let it run for a couple of seconds, then halt the machine
and look at 01000 and up.
Noel