On Feb 2, 2012, at 10:44 AM, Electron wrote:

> I'm not using and I don't want to use the standard library routines to ma=
nage
> them, yet all the other <=3D6 levels work perfectly, just the 7 doesn't. =
Is there
> anything special for level7 I'm missing, like a call to enable shadow set=
, etc..?

So what are you using?  Don't you have to do something special to make sure=
 that the alternate registers have a valid stack pointer (either having a s=
eparate stack, or updating the alternate SP from the main SP in the ISR)?

Does it work if you DO use the standard library routines?

When I was looking at it, I found the MIPS ISR preamble to be "weird." (Two=
 "general purpose" registers reserved for the ISR to trash?  Really?)

BillW

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