Math Overload

[yank38 0]

I have a system with a 505 processor. It has recently been locking up due to a math overload. Can anyone offer suggestions on how best to capture where in a scan this is happening?

[Ken Moore 23]

I use something like this, by placing this in the rung following all your math instruction, and using a different latch bit for each instance, you can see which math instruction is causing the overflow. By clearing the overflow S:5/0 as shown, you processor will not fault, but the overflow may cause unexpected actions, unlatch the overflow with caution.

[Guest]

Ken has you on the right track ... if you need more detail about the subject, then this thread might help ... and if you're using an STI setup, then this post might be of interest ...

[yank38 0]

Thanks for the suggestions.

[David Nelson 3]

was just browsing and seen this and thought i would check out Ron's post and i will say the link above is a really good post i cant thank you guys enough for taking the time to write out such long posts to help us inexperienced understand this stuff better.