Re: Bus errors accessing VME with base 7.0.6.1 and latest synApps modules

[Kevin Peterson via Tech-talk <tech-talk at aps.anl.gov>]

I modified my python script to toggle the ao values between -0.5 and 5 
and the A32 address is always -0.5:

VME Bus Error accessing A32: 0xbfe00000
machine check
Exception next instruction address: 0x032dc280
Machine Status Register: 0x0008b032
Condition Register: 0x40000844
Task: 0x3576c20 "CAC-event"
0x3576c20 (CAC-event): task 0x3576c20 has had a failure and has been 
stopped.
0x3576c20 (CAC-event): The task has been terminated because it triggered 
an exception that raised the signal 10.

I can't run the Wind River workbench yet; I'm still waiting on IT to 
start the necessary license servers.

My VME has the VMETRO bus analyzer in it, but it has probably been a 
decade since I watched someone (Ron Sluiter) use it effectively.

Kevin

On 6/9/22 11:05, Mark Rivers via Tech-talk wrote:
> If the test program loops from -0.7 to -0.5 the VME bus error address is 
> 0xbfe66664.  That is -0.6999988555908203 when interpreted as a double 
> with that address as the most significant 32 bits.  That is within the 
> now more restricted range of the output values.