I used SoftICE to debug a multitasking IVR application I'd written in C/C++ with a stack-switching kernel on top of MS-DOS :) Great project, but it would crash

I used SoftICE to debug a multitasking IVR application I'd written in C/C++ with a stack-switching kernel on top of MS-DOS :) Great project, but it would crash once or twice a day on both the test machines we had. Couldn't figure out why. Went through the code with a fine-tooth comb, still at a total loss. Enter Soft-ICE. Within a week I found that Soft ICE wouldn't interrupt in the hung state. That started making us suspicious that it might not be just our code. What do you know -- both test machines (though otherwise completely different) had the same cheap $5 ripoff network card. These were causing the crashes. Replaced those and the software worked perfectly -- ran 24/7 for 3 years without a hitch. The one time it did stop, was the NetWare stack crashing underneath. So that's my SoftICE story :)